In a reaction between acetic acid (HC2H3O2) and calcium hydroxide (Ca(OH)2), the products are calcium acetate (Ca(C2H3O2)2) and water (H2O). This is a neutralization reaction resulting in the formation of a salt and water.
Explanation:The reaction between acetic acid (HC2H3O2) and calcium hydroxide (Ca(OH)2) is an example of a neutralization reaction where an acid reacts with a base. In this case, acetic acid and calcium hydroxide react to form calcium acetate (Ca(C2H3O2)2) and water (H2O), which are the products of the reaction. This type of reaction involves the swap of cations and anions between the acid and the base to form the new products: water and a salt (calcium acetate in this case).
Once balanced, the chemical equation should look like this:
2 HC2H3O2(aq) + Ca(OH)2(aq) → Ca(C2H3O2)2(aq) + 2 H2O(l)
Answer:
A or first one
Explanation:
trust meeeeeee
3 Consider the reaction :
Na + 3 H₂ ____2NH₂
suppose that at a particular moment during the reaction, molecular hydrogen
is reacting at the rate of 0,074 m/s a) At what rate is ammonia being formed? b) At
what is molecular nitrogen reacting
Answer:
(a) The rate at which ammonia being formed = 0.0493 M/s
(b) The rate at which molecular nitrogen reacting = 0.0247 M/s
Explanation:
[tex]N_{2}+3H_{2}\longrightarrow2NH_{3}[/tex]
The rate at which molecular hydrogen is reacting = [tex]\frac{d}{dt}[H_{2}]=0.074\:M/s[/tex]
The rate of the above reaction can be expressed as:
[tex]rate=-\frac{d}{dt}[N_{2}]=-\frac{1}{3} \frac{d}{dt}[H_{2}]=\frac{1}{2}\frac{d}{dt}[NH_{3}][/tex]
(a) [tex]\frac{d}{dt}[NH_{3}]=\frac{2}{3}(0.074)=0.0493[/tex]
The rate at which ammonia being formed = 0.0493 M/s
(b) [tex]-\frac{d}{dt}[N_{2}]=\frac{1}{3}(0.074)=0.0247[/tex]
The rate at which molecular nitrogen reacting = 0.0247 M/s
Which of the following are spectator ions in the reaction shown?
Answer:
NO₃⁻(aq) and Na⁺ (aq) are spectator ions.
Explanation:
Chemical equation:
AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)
Balanced Chemical equation:
AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)
Ionic equation:
Ag⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + Cl⁻(aq) → AgCl(s) + Na⁺(aq) + NO₃⁻(aq)
Net ionic equation:
Ag⁺(aq) + Cl⁻(aq) → AgCl(s)
The NO₃⁻(aq) and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The AgCl can not be splitted into ions because it is present in solid form.
Spectator ions:
These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.
Getting these when you’re young helps your immune system fight off diseases:
A. Bandages
B. Stickers
C. Shots (immunizations)
D. Cough drops
C
Immunization shots are given to ensure immunity against future attacks on the body against the disease in which the vaccine is made.
Explanation:
The vaccine prepares the body by giving immune cells memory against the disease agent. The vaccine achieves this by introducing an attenuated form of the agent of the disease into the body. This means the introduced disease agents cannot cause disease but are enough to evoke an immune response from the body. The immune system, after eradicating the attenuated disease agent from the body, acquires memory such that it fights a real-world disease agent in case of infection.
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2. Write the formula or name for the following
compounds:
a. P205
b. CCl2
c. boron trichloride
d. dinitrogen tetrahydride
Answer:
Diphosphorus pentoxide
Carbon dichloride
BCl3
N2H4
Explanation:
These are all covalent compounds. To name covalent compounds, you add prefixes to the beginning of their names depending on what the subscript is of each element. The prefixes are:
1: Mono
2: Di
3: Tri
4: Tetra
5: Penta
6: Hexa
7: Hepta
8: Octa
9: Nona
10: Deca
For example, since the first one is Phopsphorus with a 2 next to it, you add the prefix Di to it.
If the first element in the compound only has one, meaning no number next to it, you do not say mono. This is why we just say "Carbon" for the second one instead of "Monocarbon."
Finally, you always have to end the second element in the compound with "ide." So, "chlorine" becomes "chloride," "oxygen" becomes "oxide," and so on.
The equation below shows lithium reacting with nitrogen to produce lithium nitride. 6Li + N2 2Li3N If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced? 4.0 mol 6.0 mol 12 mol 36 mol
Answer:
4 mol of lithium nitride would be produced
Explanation:
6Li + N2 → 2Li3N
This equation means that 6 mol of lithium are reacted with 1 mol of nitrogen to make, 2 mol of lithium nitride.
So this is the rule of three to find out, how many moles of lithium nitride are been made, from 12 mol of Li.
6 Li _____ 2 Li3N
12 Li ________ (12. 2) / 6 = 4 moles
Answer:
4 mol of lithium nitride would be produced
Explanation:
6Li + N2 → 2Li3N
This equation means that 6 mol of lithium are reacted with 1 mol of nitrogen to make, 2 mol of lithium nitride.
So this is the rule of three to find out, how many moles of lithium nitride are been made, from 12 mol of Li.
6 Li _____ 2 Li3N
12 Li ________ (12. 2) / 6 = 4 moles
How is a salt formed during a neutralization reaction?
A. A hydrogen ion reacts with a hydroxide ion.
B. An acid changes to a different state of matter.
C. A metal ion takes the place of the hydrogen of an acid.
D. The water molecule breaks into hydroxide and hydrogen ions.
Answer:
C. A metal ion takes the place of the hydrogen of an acid
Explanation:
When an acid react with base neutralization reaction take place.
During neutralization reaction water and salt are formed.
For example;
Base sodium hydroxide react with hydrochloric acid and form sodium chloride and water.
The sodium hydroxide consist of sodium metal ion in the form of Na⁺ and OH⁻. when it react with acid hydrogen atom of acid replace by sodium metal and react with anion of acid and form salt called sodium chloride.
Chemical equation:
NaOH + HCl → NaCl + H₂O
A salt is formed during a neutralization reaction when a hydrogen ion from an acid reacts with a hydroxide ion from a base to produce water and a salt.
Explanation:During a neutralization reaction, a salt is formed when an acid and a base react chemically with each other. The correct answer to how a salt is formed is A: A hydrogen ion reacts with a hydroxide ion. This reaction typically produces water as well, following the general reaction: acid + base → water + salt. For example, when sodium hydroxide (NaOH) reacts with hydrochloric acid (HCl), they produce sodium chloride (NaCl) and water (H2O).
A typical deposit of cholesterol,C27H460,in an artery has a mass of 3.90mg.how many molecules of cholesterol are present in this deposit?
Answer:
6.074 X 10¹⁸ molecules.
Explanation:
Molecular mass(MM) of this compound C₂₇H₄₆O
= 27*(MM of C) + 46*(MM of H) + (MM of O)
= 27*(12.0107) + 46* (1.00784) + (15.999)
= 324.2889 + 46.36064 + 15.999
=386.64854 g
The mass of a mole of any compound is called it's molar mass. 1 molar mass has 6.022 X 10²³, or Avogadro's number, C₂₇H₄₆O molecules.
If 386.64854 g of C₂₇H₄₆O has 6.022 X 10²³ molecules of cholesterol, then
3.9mg or 0.0039g of C₂₇H₄₆O will have how many molecules?..
Using unitary method:
Number of molecules = [tex]\frac{0.0039 * 6.022 *10^{23} }{386.64854}[/tex]
= 6.074 X 10¹⁸ molecules.
A drag racing vehicle travels from 0 to 100 mph in 5 seconds north.what is the acceleration
100mph = 100m/h
= 100m/h * 1 h/3600sec
= 0.028m/sec
= 0.028m/sec /5sec
= 0.055m/sec^2
Answers to all of these
Answer:
1. Percent composition of Al = 13.423 %
2.
Percent composition of Zn = 28.02 %Percent composition of Cl = 30.6 %Percent composition of O = 41.3 %3. The empirical formula is C₅O₁₆
4. Molecular Formula= P₄O₆
Explanation:
Part first :
Data Given
Formula of the Molecule = Al₂ (CrO₄)₃
% of Al₂ = ?
> First of all find the atomic masses of each component in a molecule
For Al₂ (CrO₄)₃ atomic masses are given below
Al = 27 g/mol
Cr = 52 g/mol
O = 16 g/mol
> Then find the total masses of each component
2 atoms of Al = 27 g/mol x 2
= 54 g/mol
3 atoms of Cr = 52 g/mol x 3
= 156 g/mol
12 atoms of O = 16 g/mol x 12
= 192 g/mol
> find total Molar Mass of Molecule:
Molar Mass of Al₂ (CrO₄)₃ = [27x2 + 52x3 + 16x12]
Molar Mass of Al₂ (CrO₄)₃ = 402
Now to find the mass percent of Al
Formula used to find the Mass percent of a component
Percent composition of Al = mass of Al in Molecula / molar mass of Al₂(CrO₄)₃ x 100%
Put the values
Percent composition of Al = 54 (g/mol) / 402 (g/mol) x 100%
Percent composition of Al = 13.423 %
_______________________________________
Part 2
Data Given
Formula of the Molecule = Zn(ClO₃)₂
% Zn = ?
% Cl = ?
% O = ?
> First of all find the atomic masses of each component in a molecule
For Zn(ClO₃)₂ atomic masses are given below
Zn = 65 g/mol
Cl = 35.5 g/mol
O = 16 g/mol
> Then find the total masses of each component
1 atoms of Zn= 65 g/mol x 1
= 65 g/mol
2 atoms of Cl = 35.5 g/mol x
= 71 g/mol
6 atoms of O = 16 g/mol x 6
= 96 g/mol
> find total Molar Mass of Molecule:
Molar Mass of Zn(ClO₃)₂ = [65x1 + 35.5x2 + 16x6]
Molar Mass of Zn(ClO₃)₂ = 232g/mol
Now to find the mass percent of of each component one by one
1. Formula used to find the mass percent of Zn
Percent composition of Zn= mass of Zn in Molecular / molar mass of Zn(ClO₃)₂ x 100%
Put the values
Percent composition of Zn = 65(g/mol) / 232 (g/mol) x 100%
Percent composition of Zn = 28.02 %
-------------------
2. Formula used to find the mass percent of Cl
Percent composition of Cl = mass of Cl in Molecular / molar mass of Zn(ClO₃)₂ x 100%
Put the values
Percent composition of Cl = 71 (g/mol) / 232 (g/mol) x 100%
Percent composition of Cl = 30.6 %
---------------------
3. Formula used to find the mass percent of O
Percent composition of O = mass of O in Molecular / molar mass of Zn(ClO₃)₂ x 100%
Put the values
Percent composition of O = 96 (g/mol) / 232 (g/mol) x 100%
Percent composition of O = 41.3 %
________________________________________
Part 3:
Data Given
Percentage of C = 27.3 %
Percentage of O = 72.7 %
Emperical Formula of the compound = ?
Solution:
So the compound has 27.3 % C and 72% O
First, find the mass of each of the elements in 100 g of the Compound.
C = 27.3 g
O = 72 g
Now find how many moles are there for each element in 100 g of compound
For this molar mass are required
That is
C = 12 g/mol
O = 16 g/mol
Formula Used
mole of C = mass of C / Molar mass of C
mole of C = 27.3 / 12 g/mol
mole of C = 2.275
Formula Used
mole of O = mass of O / Molar mass of O
mole of O = 72g / 16 g/mol
mole of O = 7.2
Divide each one by the smallest number of moles
C = 2.275 / 2.275
C = 1
O = 7.2 / 2.275
O = 3.2
Multiply the mole fraction to a number to get the whole number.
C = 1 x 5 = 5
O = 3.2 x 5 = 16
So, the empirical formula is C₅O₁₆
______________________________________
Part 4
Data Given
Percentage of P= 56.38 %
Percentage of O = 43.62%
Molar Mass = 219.9g
Molecular Formula of the compound = ?
Solution:
First, find the mass of each of the elements in 100 g of the Compound.
Mass of P= 56.38g
Mass of O = 43.62g
Now find how many moles are there for each element in 100 g of compound
find the moles in total compounds
Formula Used
mole of P = mass of / Molar mass of P
mole of P = 56.38 g / 31 g/mol
mole of P = 1.818
Formula Used
mole of O = mass of O / Molar mass of O
mole of O = 43. 62 / 16 g/mol
mole of O = 2.7262
Now
first find the Emperical formula
Divide each one by the smallest number of moles
P = 1.818 /1.818
P= 1
for oxygen
O = 2.7262 / 1.818
O = 1.5
Multiply the mole fraction to a number to get the whole number.
P = 1 x 2 = 2
O = 1.5 x 2 = 3
So, the empirical formula is P₂O₃
Now
Find molar mass of the empirical formula P₂O₃
2 (31) + 3 (16) = 62 + 48 = 110
Now find that how many empirical units are in a molecular unit.
(219.9 g/mol) / ( 110 g/mol) = empirical units per molecular unit
empirical units per molecular unit = 1.999 =2
A here we get two empirical units in a molecular unit,
So the molecular formula is:
2 (P₂O₃) = P₄O₆
Assign oxidation numbers to the following
Li3PO4
SO3 2-
Cr2s3
NO3-
You may find bellow the assignment of the oxidation number for each atom.
Explanation:
Li₃PO₄
Li have the oxidation number +1
P have the oxidation number +5
O have the oxidation number -2
SO₃²⁻
S have the oxidation number +4
O have the oxidation number -2
Cr₂S₃
Cr have the oxidation number +3
S have the oxidation number -2
NO₃⁻
N have the oxidation number +5
O have the oxidation number -2
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29.5 g of mercury is heated from 32°C to 161°C, and absorbs 499.2 joules of heat in the process. Calculate the specific heat capacity of mercury (in Jg°C).
Answer:
c = 0.13 j/ g.°C
Explanation:
Given data:
Mass of mercury = 29.5 g
Initial temperature = 32°C
Final temperature = 161°C
Heat absorbed = 499.2 j
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
Q = m.c. ΔT
ΔT = T2 - T1
ΔT = 161°C - 32°C
ΔT = 129 °C
Q = m.c. ΔT
c = Q / m. ΔT
c = 499.2 j / 29.5 g. 129 °C
c = 499.2 j / 3805.5 g. °C
c = 0.13 j/ g.°C
If 25 mL of KOH were needed to neutralize 15 mL of 3.5 M HBr, calculate the molarity of the base
Answer:
2.1 M KOH is required.
Explanation:
It is an example of acid-base neutralization reaction.
KOH + HBr ----> KBr + [tex]H_{2}O[/tex]
Base Acid Salt
When two component react then the number of moles of both the component should be same, therefore the number of moles and acids and bases should be the same in the following .
Molarity= [tex]\frac{\textrm{No. of moles}}{\textrm{Volume of the particular solution}}[/tex]
No.of moles= Molarity × Volume of the Particular Solution
Therefore,
[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]------------------------------(1)
where
[tex]M_{1}[/tex]= Molarity of Acid
[tex]V_{1}[/tex]= Volume of Acid
[tex]M_{2}[/tex]= Molarity of Base
[tex]V_{2}[/tex]= Volume of Base
[tex]M_{1}[/tex]=3.5 M
[tex]V_{1}[/tex]=15 mL
[tex]V_{2}[/tex]=25 mL
[tex]M_{2}[/tex]=??(in M)
Plugging in Equation 1,
3.5 × 15 = [tex]M_{2} [/tex] × 25
[tex]M_{2} [/tex]=[tex]\frac{3.5 * 15}{25}[/tex]
[tex]M_{2} [/tex]=2.1 M
If you have 100 g of radioactive isotope with a half-life of 10 years:
How much of the isotope will you have left after 10 years?
How much of the isotope will you have left after 20 years?
How many Half lives Will occur in 40 years?
#1. 50 g
#2. 25 g
#3. 4 half lives
Explanation:We are given;
Original mass of a radioisotope as 100 g Half life of the radioisotope as 10 yearsWe need to answer the questions:
#a. Mass remaining after 10 years
Using the formula;
Remaining mass = Original mass × 0.5^n , where n is the number of lives.
In this case, since the half life is 10 years then n is 1
Therefore;
Remaining mass = 100 g × 0.5^1
= 50 g
Therefore, 50 g of the isotope will remain after 10 years
#b. Mass of the isotope that will remain after 20 years
Remember the formula;
Remaining mass = Original mass × 0.5^n
n = Time ÷ half life
n = 20 years ÷ 10 years
= 2
Therefore;
Remaining mass = 100 g × 0.5^2
= 25 g
Thus, 25 g of the isotope will be left after 20 years
#3. Number of half lives in 40 years
1 half life = 10 years
But; n = time ÷ half life
= 40 years ÷ 10 years
= 4
Thus, the number of half lives in 40 years is 4.
2. When atoms are heated so that they emit light, what characteristic of their light
allows you to tell one atom from another?
Answer:
The color of the light.
Explanation:
When an atom is heated, its electrons are excited and they jump to higher energy levels. The electrons will return to their normal energy level, and by doing this, they will emit a photon of energy, which is in the form of light. The color of the light depends on the difference of energy of the two levels, and because of that is different for each element.
Each atom emits light at different wavelengths that form its unique atomic emission spectrum when heated. By studying this spectrum, one can distinguish between different atoms. For example, hydrogen and helium atoms yield different spectral patterns due to the unique energy transitions in their electrons.
Explanation:When atoms are heated, they emit light consisting of many different colors or wavelengths, which is collectively referred to as an atom's spectral lines or spectrum. Every atom has a unique spectrum, equivalent to a 'fingerprint' because its electron energies are unique. This concept is called the atomic emission spectrum. Thus, by studying the spectrum emitted by an atom, we can tell one atom from another.
For instance, when hydrogen atoms are heated, they emit a specific spectral line that looks predominantly red because of the transitions that hydrogen's single electron makes. On the other hand, a helium atom's spectrum would look different, containing more diverse and vibrant colors due to the different energy transitions in its two electrons. By comparing the observed spectrum to known emission spectra, we can identify the type of atom.
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what is the formula used to find the heat energy for vaporization heat energy for fusion hrat energy for liquid
Answer:
Use the formula q = m·ΔHv in which q = heat energy, m = mass, and ΔHv = heat of vaporization.
Explanation:
:)
Final answer:
The formula used to find the heat energy for vaporization is heat = m × AHvap, and for fusion is heat = n × ΔΗfus. The heat energy for a liquid can be calculated using the equation q = mcAT.
Explanation:
The formula used to find the heat energy for vaporization is heat = m × AHvap, where m is the mass in grams and AHvap is expressed in energy/gram. The formula for the heat energy for fusion is heat = n × ΔΗfus, where n is the number of moles of material and ΔΗfus is the heat of fusion per mole. The heat energy for a liquid can be calculated using the equation q = mcAT, where q is the amount of heat transferred, m is the mass of the liquid, c is the specific heat capacity of the liquid, and AT is the change in temperature.
What is the formula of the hydrated calcium sulfate, i.e., what is the whole number mole ratio of calcium sulfate to water?
(Can you answer quickly. I have exam tomorrow :)
Chemical formula of calcium sulfate dihydrate: CaSO₄ · 2 H₂O
There is a 1 : 2 mole ratio between calcium sulfate and water.
Explanation:
The calcium sulfate may be find as an anhydrous salt or a dihydrate. In the case of the dihydrate the chemical formula is CaSO₄ · 2 H₂O.
In the calcium sulfate dihydrate there are 1 mole of CaSO₄ and 2 moles of H₂O, so the mole ratio between the salt and the water molecules is 1 : 2.
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Final answer:
The hydrated form of calcium sulfate, also known as gypsum, has a chemical formula of CaSO4·2H2O, indicating a 1:2 mole ratio of calcium sulfate to water.
Explanation:
The hydrated form of calcium sulfate is commonly known as gypsum, and its chemical formula is CaSO4·2H2O. This indicates that there is a whole number mole ratio of 1:2 between calcium sulfate and water. Hydrates are compounds that include water molecules absorbed into their structure, and this absorbed water plays an essential role in the physical properties of the material. In the case of gypsum, the two water molecules are crucial for its use in construction and medical applications, such as in plaster of Paris.
Which examples are indirect evidence used to study Earth's interior? Check all that apply.
composition of minerals in a rock
analysis of several seismographs
location of an earthquake's epicenter
identification of seismic wave direction
texture of different core rock samples
Answer:
c.) location of earthquakes epicenter
Explanation:
<3
Examples of indirect evidence used to study Earth's interior are analysis of several seismographs and identification of seismic wave direction, which allow scientists to gain insights into the Earth's structure through the behavior of seismic waves.
Explanation:Indirect evidence used to study Earth's interior includes seismic-related observations as they offer insights without direct sampling. The correct examples of indirect evidence for studying Earth's internal structure are:
Analysis of several seismographsIdentification of seismic wave directionThis evidence is gathered through monitoring how seismic waves travel through and interact with the Earth's layers. Seismic waves behave similarly to sound waves in a struck bell; they reflect, refract, and vary in velocity depending on the material they pass through, providing a model of the internal structure. Therefore, by setting up a network of seismographs around the globe, scientists can detect the pattern of waves, which helps them understand the different layers within Earth's interior.
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A certain radioactive isotope takes 8.40 s for 85.0% of the isotope to decay. What is the half-life of the isotope?
1.0 s
3.07 s
4.02 s
1.25 s
12.5 s
Answer:
3.07 seconds is the half-life of the isotope.
Explanation:
Initial mass of an isotope = x
Time taken by the sample, t = 8.40 s
Mass of an isotope decayed= 85.0%
Final mass of an isotope left=(100%-85%)of x= 15.0% of x = 0.15x
Half life of an isotope =[tex]t_{\frac{1}{2}} = ?[/tex]
Formula used :
[tex]N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}[/tex]
where,
[tex]N_o[/tex] = initial mass of isotope
N = mass of the parent isotope left after the time, (t)
[tex]t_{\frac{1}{2}}[/tex] = half life of the isotope
[tex]\lambda[/tex] = rate constant
[tex]0.15x=x\times e^{-(\frac{0.693}{t_{1/2}})\times 8.40 s}\\\\N=N_o\times e^{-0.693}[/tex]
Now put all the given values in this formula, we get
[tex]t_{1/2]=3.07 s[/tex]
3.07 seconds is the half-life of the isotope.
a rectangular solid of unknown density is 5 meters long, 2 meters high, and 4 meters wide. The mass of this solid is 300 grams. Given this information for this homogeneous material, calculate the density.
Answer:if you could be more spesific id be happpy to help
Explanation:
thanks sm.
Answer:
The density of the material is 7.5 g/m^3
Explanation:
The volume of a rectangle is:
Volume = Length*Height*Width
Replacing with data:
Volume = 5 m * 2 m * 4 m = 40 m^3
Density is computed as follows:
Density = Mass/Volume
Replacing with data:
Density = 300 g/40 m^3
Density = 7.5 g/m^3
What substances react and form during oxidation
Answer:
carbon dioxide and water
Explanation:
ncompletely oxidized (in this sense, oxidation means the removal of electrons or hydrogen atoms), the end product being (apart from carbon dioxide and water)
Oxidation is the process of losing electron or reaction with oxygen. If the reactant burn in oxygen then it gives water and carbon dioxide and this type of oxidation is called combustion.
What is oxidation?Oxidation is the process of combining with oxygen or to lose electron to form the higher oxidation state. For example metals lose electrons forming their higher oxidation states. Fe lose its 2 electrons forming Fe²⁺ ion is an example of oxidation.
When a compound burns in oxygen it oxidizes to carbon dioxide and water, and the reaction is called combustion. Fuel gases such as hydrocarbons easily undergoes combustion reaction.
Similarly, organic molecules such as alcohols, ketones, aldehydes etc. undergo oxidation forming corresponding acids. The reagents which oxidizes other reactants is called oxidizing agent.
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If the temperature of a gas is raised from 30°C to 60°C, what happens to the pressure?
The pressure increases by 10% of the original pressure
Thus the new pressure is 1.1 times the original pressure.
Explanation:We are given;
Initial temperature as 30°C, but K = °C + 273.15Thus, Initial temperature, T1 =303.15 KFinal temperature, T2 is 333.15 KWe are required to state what happens to the pressure;
We are going to base our arguments to Pressure law;According to pressure law, the pressure of a gas and its temperature are directly proportional at a constant volumeThat is; P α TTherefore, at varying pressure and temperature[tex]\frac{P1}{T1}=\frac{P2}{T2}[/tex]
Assuming the initial pressure, P1 is P
Rearranging the formula;
[tex]P2=\frac{P1T2}{T1}[/tex]
[tex]P2=\frac{(P)(333.15K)}{303.15K}[/tex]
[tex]P2 = 1.099P[/tex]
= 1.10 P
The new pressure becomes 1.10P
This means the pressure has increased by 10%
We can conclude that, the new pressure will be 1.1 times the original pressure.
Match the sequence number with the energy transformations from the water behind a hydroelectric dam to the lighting
of a light bulb.
1. rain falls, being trapped behind dams
2. energy transferred to home to power light bulb
3. turbines generate electrical energy
4. potential energy of water behind dam converted into kinetic energy by turning turbines
Answer:
1.heat evaporates water from oceans
2.rain falls, being trapped behind dams
3.potential energy of water behind dam converted into kinetic energy by turning turbines
4.turbines generate electrical energy
The sequence number with the energy transformations from the water behind a hydroelectric dam to the lighting of a light bulb is as follows:
1.Energy transferred to home to power light bulb
2.Rain falls, being trapped behind dams
3.Potential energy of water behind dam converted into kinetic energy by turning turbines
4.Turbines generate electrical energy
What is energy transformation ?The term energy transformation is define as the conversion of one form of energy into another form, or the movement of energy from one place to another place.
The energy is a quantity that provides the tendency to perform work or moving, or provides heat.
Thus, Energy transferred to home to power light bulb, rain falls, being trapped behind dams,potential energy of water behind dam converted into kinetic energy by turning turbines, turbines generate electrical energy.
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How do producers and consumers get energy from the sun?
Answer: In photosynthesis, producers combine carbon dioxide, water, and sunlight to produce oxygen and sugar (their food). Other organisms get energy by eating producers. ... It cannot directly use the Sun's energy to make food. As a consumer, it has to eat— or, consume— other organisms for energy.
Explanation: Thats how both producers and consumers get energy
Producers like plants and algae utilize photosynthesis to convert sunlight into energy, which is then consumed by animals in an ecosystem. All life forms are reliant on the sun's energy for survival.
Producers such as plants, algae, and some bacteria, capture sunlight to make food through photosynthesis, converting it into glucose. Consumers, like animals, obtain energy from producers directly or indirectly by feeding on them or other consumers. Energy flow in ecosystems ensures that all life forms ultimately depend on the sun's energy for survival.
How much energy in (kJ) is required to decompose 14.7 g of CaCO3.
CaCO3(s) + 556 kJ > CaO(s) + CO2(g)
Answer:
81.732KJ
Explanation:
Reaction : CaCO₃(s) → CaO(s) + CO₂(g), +556KJ
⇒To decompose 1 mole of CaCO₃, 556KJ of energy is required
The molecular weight of CaCO₃ is 40 + 12 + 3×16
⇒ molecular weight of CaCO₃ = 100 g
∴ 100 g of CaCO₃ requires 556KJ of energy
Need to find out how much energy is required by 14.7 g of CaCO₃
⇒ [tex]\frac{100}{14.7}[/tex] = [tex]\frac{556}{E}[/tex]
⇒ E = [tex]\frac{556}{100}[/tex]×14.7 KJ = 81.732 KJ
∴ Energy required to decompose 14.7 g of CaCO₃ is 81.732 KJ
Answer:
81.732 kilo Joules of energy is required to decompose 14.7 grams of calcium carbonate.
Explanation:
Moles of calcium carbonate = [tex]\frac{14.7 g}{100 g/mol}=0.147 mol[/tex]
[tex]CaCO_3(s) + 556 kJ\rightarrow CaO(s) + CO_2(g)[/tex]
According to reaction, 1 mole of calcium carbonate requires 556 kilo Joules of energy to decompose:
Then 0.147 moles of calcium carbonate will need:
[tex]0.147 \times 556 kJ=81.732 kJ[/tex]
81.732 kilo Joules of energy is required to decompose 14.7 grams of calcium carbonate.
One city is located north of the equator and experiences average rainfall and warm temperatures. Another city is located exactly the same distance from the equator, but south. How will these two climate areas be the same or different?
Cities located the same distance from the equator, one north and one south, will have similar climates in terms of temperature and average rainfall, due to the similar amount of sunlight they receive. However, their seasons will be inverted, as when it is summer in the Northern Hemisphere, it will be winter in the Southern Hemisphere, and vice versa.
Explanation:Your question inquires about how the climates of two cities would compare if they were equidistant from the equator, one being to the north and the other to the south. The climates of these two cities would be similar because they're situated at the same distance from the equator. The equator receives an equal amount of sunshine throughout the year, contributing to relatively stable, warm temperatures. However, their seasons might differ due to the tilting of the earth's axis causing variations in the intensity of solar radiation at different times of the year in both hemispheres.
A region's long-term, predictable atmospheric conditions are referred to as its "climate." This includes regular seasonal variations in rainfall and temperature. However, the timing and nature of these seasons may differ between the northern and southern hemispheres. Where the Northern Hemisphere experiences summer, the Southern Hemisphere experiences winter, and vice versa.
Therefore, although the two cities might experience similar average rainfall and temperatures due to their similar distances from the equator, the timings of their seasons would be inverted.
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Identify which subatomic particle match each descriptions
Answer:
The complete question is given below:
Explanation:
Identify which subatomic particle match each description:
1) Particles that have a relative charge of +1.
Proton have the relative charge of +1 .
2) Particles that have a relative charge of -1.
Electron have relative charge of -1.
3) Particles that have no charge.
Neutron have no charge. It is neutral.
4) Particles that are located in the nucleus of an atom.
The protons and neutrons both are present in the nucleus.
5) Particles that have a much lower mass than the other types of particles.
Proton and neutrons are present in the nucleus. The most mass of an atom present in nucleus while electrons are present out side the nucleus and have negligible mass as compared to neutron and proton.
Explnation:
electron:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e-
Mass= 9.10938356×10-31 Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
Proton and neutron:
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P+
Symbol of neutron= n0
Mass of proton=1.672623×10-27 Kg
Mass of neutron=1.674929×10-27 Kg
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
What's WO2 in empirical form?
Answer:
WO2:
Explanation:
If any element symbol in a formula has no subscript, implying a subscript of one, the formula is already empirical.
What is the percentage error if the experimental
value is equal to the accepted value?
Final answer:
If the experimental value equals the accepted value, the percentage error is 0%, indicating perfect accuracy in the measurement.
Explanation:
When the experimental value of a measurement precisely matches the accepted value, the percentage error is 0%. This indicates that there is no discrepancy between the measured value and the standard or true value. Percentage error is a way to express the accuracy of an experimental measurement and is calculated using the formula: |experimental value - accepted value| × 100% / accepted value.
Therefore, if both values are equal, the formula results in 0%. As the accuracy of a measurement decreases, signified by a larger discrepancy between the experimental and accepted values, the percentage error correspondingly rises. Reporting the percentage error is critical for underscoring the reliability and precision of an experiment's results.
why did the french became allies with the american?
Answers:
To get revenge for recent French losses in North America
To gain territory in the west
To protect the iroquols from British attacks
Answer:
It’s to gain territory
Because they wanted more territory than what they already had.
Answer:
Answer: To get revenge for recent French losses in North America.
Explanation:
The Seven Years War was fought in Europe from 1756-63. That conflict as it extended to colonial territories in the New World was known as the French and Indian War. Losing that conflict in North America to the British didn’t sit well with France. And so when the colonial Americans broke out in revolution against the British monarchy, France devoted enormous financial aid (as well as officer support) to the Americans. The cost to France for supporting America’s revolution added up to 1 billion livers (about 4 billion in today’s dollars). This is part of what put France’s debt problem over the edge and led to the French Revolution.
Given 6 moles of CuCl2, how many moles of AlCl, were made? SHOW the math below
Answer:
6 moles of CuCl₂ will produced 4 moles of AlCl₃ .
Explanation:
Given data:
Moles of CuCl₂ = 6 mole
Moles of AlCl₃ produced = ?
Solution:
3CuCl₂ + 2Al → 2AlCl₃ + 3Cu
Now we will compare the moles of CuCl₂ with AlCl₃ .
CuCl₂ : AlCl₃
3 : 2
6 : 2/3 ×6 = 4 mol
So, 6 moles of CuCl₂ will produced 4 moles of AlCl₃ .