What is a rocky part of the shore that sticks out in th ocean
The passage refers to solutions as homogeneous mixtures. what is the best definition of a homogeneous mixture?
a.a mixture that is uniform throughout
b.a mixture of large particles in a medium that will settle
c.a mixture of particles that remains suspended in a medium
d.a mixture in which the components are easily distinguishable
Do all molecules contain only single bonds
Answer: The given statement is false.
Explanation:
A single bond is defined as the bond through which two same or different atoms are combined to each other by a single line. It is represented by a hyphen.
For example, C-H shows that both carbon and hydrogen atoms are attached to each other through single bond.
It is not necessary that all the molecules contain a single bond. This is because there are molecules which contain a double or triple bond also.
For example, [tex]H_{2}C=CH_{2}[/tex] is ethene molecule and it contains a double bond.
Therefore, we can conclude that the statement all molecules contain only single bond, is false.
1. The IMA of the doorknob shown is .
1
0.2
6
2. What is the IMA of the inclined plane shown?
6
6.75
3
3. Choose the mathematical formula expressing work.
W=F x d
W=d/F
W=F/d
Explanation :
(a) The full form of IMA is Ideal Mechanical Advantage. It is given as the ratio of the radius of the wheel and the radius of the axle.
From the figure,
The radius of the wheel is 6 cm
and the radius of the axle is 1 cm.
[tex]IMA=\dfrac{6\ cm}{1\ cm}=6\ cm[/tex]
So, the IMA of the doorknob is 6.
(b) The IMA of the inclined plane is given by the ratio of the distance covered by the effort (L) and the distance covered by the resistance (h).
So, [tex]IMA=\dfrac{4.5\ m}{1.5\ m}=3[/tex]
So, the IMA of the inclined plane is 3.
(c) Work done is the product of the force acting and the displacement caused.
Mathematically, it can be written as :
[tex]W=F\times d[/tex]
F is applied force
d is the distance or displacement.
What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare
100.0 milliliters of a 0.50 M acetic acid solution?
Use the equation
Mconcentrated × Vconcentrated = Mdilute × Vdilute.
90points given to correct answer
Answer
is: volume is 20 mL.
c₁(CH₃COOH) = 2,5 M.
c₂(CH₃COOH) = 0,5 M.
V₂(CH₃COOH) = 100 mL.
V₁(CH₃COOH) = ?
c₁(CH₃COOH) · V₁(CH₃COOH)
= c₂(CH₃COOH) · V₂(CH₃COOH).
2,5 M · V₁(CH₃COOH)
= 0,5 M · 100 mL.
V₁(CH₃COOH) = 0,5 M · 100 mL ÷ 2,5 M.
V₁(CH₃COOH) = 20 mL ÷ 1000 mL/L =0,02 L.
Answer:
20 milliliters
Explanation:
I don't cap
A reaction has the following values. Calculate ΔG.
ΔH = -85.5 kJ/mole ΔS = 0.133 kJ/mole.K) Temperature = 110 ºC
1. -35 kJ
2. -64 kJ
3. -86 kJ
4. -136 kJ
Final answer:
To calculate ΔG, we use the equation ΔG = ΔH - TΔS, converting temperature to Kelvin and substituting the given values. The calculation gives a ΔG of approximately -136.47945 kJ/mol, so the closest answer is -136 kJ.
Explanation:
To calculate the change in Gibbs free energy (ΔG), we can use the Gibbs free energy equation:
ΔG = ΔH - TΔS
First, convert the temperature from Celsius to Kelvin:
T(K) = T(°C) + 273.15 = 110 °C + 273.15 = 383.15 K
Then substitute the given values into the equation:
ΔH = -85.5 kJ/mol
ΔS = 0.133 kJ/(mol)·K
T = 383.15 K
ΔG = (-85.5 kJ/mol) - (383.15 K)(0.133 kJ/(mol)·K)
ΔG = -85.5 kJ/mol - (50.97945 kJ/mol)
ΔG = -136.47945 kJ/mol
The closest answer to ΔG is option 4, -136 kJ.
Determine the [oh−] of a solution that is 0.125 m in co32−.
Final answer:
To estimate the concentration of hydroxide ions ([OH-]) in a 0.125 M carbonate (CO3²-) solution, we would simply use the stoichiometry assuming that each carbonate ion becomes one hydroxide ion, giving an approximate [OH-] value of 0.250 M. This is a simplification and actual values may vary according to equilibrium dynamics.
Explanation:
To determine the concentration of hydroxide ions ([OH-]) in a solution that is 0.125 M in carbonate ions (CO32-), we need to understand the relationship between carbonate and hydroxide ions in an aqueous solution. Carbonate ions can react with water in a basic reaction to form bicarbonate ions (HCO3-) and hydroxide ions (OH-).
In this reaction, each carbonate ion can produce two hydroxide ions. Therefore, if we have a 0.125 M solution of carbonate ions, we could potentially have a hydroxide concentration of 0.125 M × 2 = 0.250 M. But, since this is a basic reaction and not all carbonate will turn into hydroxide ions (due to equilibrium with bicarbonate), we need additional information to calculate the exact hydroxide concentration, such as the equilibrium constant for the reaction.
However, without this information, we can assume a 1:1 stoichiometry for simplicity, giving us an initial approximate [OH-] concentration of 0.250 M. This is a simplification and the actual concentration could be less due to the reasons stated above.
For more accurate results, we would use the equilibrium constant for the reaction between carbonate and water to calculate the exact [OH-].
By analogy to examples given in the text, predict what gas forms when na2so3(s) reacts with hcl(aq). express your answer as a chemical formula.
Answer: The gas formed by the reaction of sodium sulfite and hydrochloric acid is [tex]SO_2[/tex]
Explanation:
When sodium sulfite reacts with hydrochloric acid, it leads to the formation of many products.
The chemical equation for the reaction of two reacts are:
[tex]Na_2SO_3(s)+2HCl(aq.)\rightarrow 2NaCl(aq.)+SO_2(g)+H_2O(l)[/tex]
By Stoichiometry of the reaction:
1 mole of solid sodium sulfite reacts with 2 moles of aqueous hydrochloric acid to produce 2 moles of aqueous sodium chloride, 1 mole of sulfur dioxide gas and 1 mole of water molecule.
Hence, the gas formed by the reaction of sodium sulfite and hydrochloric acid is [tex]SO_2[/tex]
The gas formed by the reaction of [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{S}}{{\text{O}}_3}[/tex] with HCl is [tex]\boxed{{\text{S}}{{\text{O}}_2}}[/tex]
Further Explanation:
The five types of chemical reactions are as follows:
1. Combination reactions:
These reactions are also known as a synthesis reaction. These are the reaction in which two or more reactants combine to form single product. These are generally accompanied by the release of heat so they are exothermic reactions.
Examples of combination reactions are as follows:
(a) [tex]{\text{Ba}}+{{\text{F}}_2}\to{\text{Ba}}{{\text{F}}_2}[/tex]
(b) [tex]{\text{CaO}}+{{\text{H}}_2}{\text{O}}\to{\text{Ca}}{\left({{\text{OH}}}\right)_2}[/tex]
2. Decomposition reactions:
The opposite of combination reactions is called a decomposition reaction. Here, a single reactant gets broken into two or more products. Such reactions are usually endothermic because energy is required to break the existing bonds between the reactant molecules.
Examples of decomposition reactions are as follows:
(a) [tex]2{{\text{H}}_2}{{\text{O}}_2}\to2{{\text{H}}_2}{\text{O}}+{{\text{O}}_2}[/tex]
(b) [tex]2{\text{NaCl}} \to{\text{2Na+C}}{{\text{l}}_2}[/tex]
3. Displacement reactions
Also known as replacement or metathesis reactions. Here, one of the reactants gets replaced by the other one. Generally, the more reactive element displaces the less reactive element. Both metals and non-metals can take part in displacement reactions.
Examples of displacement reactions are as follows:
(a) [tex]{\text{Cu}}+{\text{AgN}}{{\text{O}}_3}\to{\text{Ag}}+{\text{Cu}}{\left({{\text{N}}{{\text{O}}_3}}\right)_2}[/tex]
(b) [tex]{\text{C}}{{\text{l}}_2}+{\text{KBr}}\to{\text{B}}{{\text{r}}_2}+{\text{KCl}}[/tex]
4. Double displacement reactions
These are the reaction in which ions of two compound interchange with each other to form the product. For example, the general double displacement reaction between two compound AX and BY is as follows:
[tex]{\text{AX}}+{\text{BY}}\to{\text{AY}}+{\text{BX}}[/tex]
Examples of double displacement reactions are as follows:
(a) [tex]{\text{N}}{{\text{a}}_2}{\text{S}}+{\text{HCl}}\to{\text{NaCl}}+{{\text{H}}_2}{\text{S}}[/tex]
(b) [tex]2{\text{KOH}}+{\text{Cu}}{\left({{\text{N}}{{\text{O}}_{\text{3}}}}\right)_2}\to2{\text{KN}}{{\text{O}}_3}+{\text{Cu}}{\left({{\text{OH}}}\right)_2}[/tex]
5. Combustion reactions:
These are the reactions that take place when hydrocarbons are burnt in the presence of oxygen to form carbon dioxide and water. These are also referred to burning.
Example of combustion reactions are as follows:
(a) [tex]{\text{C}}{{\text{H}}_4}+{{\text{O}}_2}\to{\text{C}}{{\text{O}}_2}+{{\text{H}}_2}{\text{O}}[/tex]
(b) [tex]{{\text{C}}_{10}}{{\text{H}}_{14}}+12{{\text{O}}_2}\to10{\text{C}}{{\text{O}}_2}+4{{\text{H}}_2}{\text{O}}[/tex]
The given reaction occurs as follows:
[tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{3}}}\left(s\right)+{\text{2HCl}}\left({aq}\right)\to{\text{2NaCl}}\left({aq}\right)+{\text{S}}{{\text{O}}_{\text{2}}}\left(g\right)+{{\text{H}}_{\text{2}}}{\text{O}}\left(l\right)[/tex]
This is an example of a double displacement reaction. Here [tex]{\text{N}}{{\text{a}}_{\text{2}}}{\text{S}}{{\text{O}}_3}[/tex] reacts with HCl to form NaCl, [tex]{\text{S}}{{\text{O}}_2}[/tex] and [tex]{{\text{H}}_{\text{2}}}{\text{O}}[/tex] . Of all the products formed, NaCl is present in the aqueous phase, [tex]{{\text{H}}_{\text{2}}}{\text{O}}[/tex] is in liquid state and [tex]{\text{S}}{{\text{O}}_2}[/tex] is in gaseous state.
So the gas formed in the above reaction is [tex]{\mathbf{S}}{{\mathbf{O}}_{\mathbf{2}}}[/tex] .
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Chemical reaction and equation
Keywords: SO2, Na2SO3, HCl, NaCl, H2O, double displacement reaction, combination reaction, combustion reaction, displacement reaction, decomposition reaction, aqueous, liquid, gaseous state.
Explain, in detail, how you convert grams of one substance to grams of something else. Be specific and include each step
Calculate the molality of a solution prepared by dissolving 175 g of KNO3 in 750 g of water. (round to nearest hundreth)
Answer:
2.31 molar
Explanation:
175 g/101 g/mol=1.73 mol
1.73mol/.750 L = 2.31 mol/L
Atom A has seven electrons in its outer shell. Atom B has one electron in its outer shell. They react and bond. Now both atoms have eight electrons in their outer shells. What kind of bond has formed?
The atom with 7 valence electrons gains one electron from the second atom with one valence electrons will bond together through ionic bonding.
What are ionic compounds ?Ionic compounds are formed between metals and non-metals. The metals are electropositive and easily loss electrons to electron deficient non metals to achieve octet.
When the non-metals gain electrons they acquire a negative charge and metals gain a positive charge by losing electron. These opposite charges electrostatically attracts and form the ionic bond.
The atom with one valence electron will donate it to the atom with 7 valence electrons to achieve octet. The donated atom acquires a positive charge and the received atom gains a negative charge. These ions attracts electrostatically to form the bond.
For example, in NaCl, sodium chloride is an ionic compound formed by donating an electrons from the sodium metal to the Cl atom. Thus, Na becomes Na + and Cl becomes Cl-. Therefore, option c is correct.
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An atom of an element with two valence electrons reacts with two atoms of an element with atomic number 17 to form an ionic compound. What is the compound MOST LIKELY formed as described? A) CaF2 B) MgCl2 C) CO2 D) BeBr2
Answer is: B) MgCl2.
Chlorine has atomic number 17, it means it has 17 protons and 17 electrons.
Electron configuration of chlorine atom: ₁₇Cl 1s² 2s² 2p⁶ 3s² 3p⁵.
Chloride is negative ion of chlorine. Chloride is formed when chlorine gain one lectron.
Chloride anion has 17 protons and 18 electrons (like argon-noble gas).
The electron configuration for the chloride ion: ₁₇Cl⁻ 1s²2s²2p⁶3s²3p⁶.
Magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number.
Magnesium is metal from second group of Periodic table of elements and it lost two electrons to have electron configuration as closest noble gas neon (₁₀Ne), chlorine is nonmetal from 17. group of Periodic table and it gains one electron to have electron configuration as argon (₁₈Ar).
Which phrase is the best definition for the word common in environmental science?
A. A typical resource
B. A shared resource
C. A worthless resource
D. A rare resource
Answer:
B is correcta-moundo
Explanation:
If 30mL of 0.5M KOH is needed to neutralize 2M HCl, what was the volume of the acid?
How many grams of hcl can be produced if 7.25 g of cl2 is reacted with an unlimited supply of h2?
Did you ever get the correct answer?
Final answer:
To find the mass of HCl produced, use stoichiometry based on the balanced chemical equation.
Explanation:
To find the number of grams of HCl that can be produced, we need to use the stoichiometry of the balanced chemical equation. From the equation, we can see that for every 2 moles of AlCl3, 6 moles of HCl are produced. Therefore, we can set up a proportion:
2 moles AlCl3 / 6 moles HCl = 249 g AlCl3 / x g HCl
Solving for x, we find that x = 747 g HCl. Therefore, 747 grams of HCl can be produced when 249 g of AlCl3 is reacted.
In order to from magma, what must happen to sedimentary, metamorphic, or igneous rocks?
One kind of radiation not released by radioactive decay is ______
~A~ Free Protons
~B~ Beta Particles
~C~ Gamma Rays
~D~ Alpha Particles
Based on the activity series, which metals could X represent in the reaction below? (Note: The equation is not balanced.)
X + MgSO4 —> Mg + XSO4
A) Sr
B) Al
C) Sn
D) Au
•In carrying out an experiment based on this reaction, 2.45 L of dinitrogen tetroxide were used. How many liters of nitrogen dioxide are produced? Temperature and pressure were held constant. Work must be shown in order to earn credit.
Jason-1 was launched to:
measure ocean waves
determine air moisture
survey ocean currents
all of the above
Answer: survey ocean currents
The correct answer will be option- all of the above.
Explanation:
Jason or "Joint Altimetry Satellite Oceanography Network" is the satellite sent under the joint mission between NASA and CNES in France.
The satellite worked from 2001 to 2005 which was succeeded by Jason-2 in 2008.
The main aim of this was to measure climate change by measuring the valleys and hills of the ocean's surface. This helped to determine the direction of the ocean currents and global ocean circulation. This also helped the determine the air moisture.
Thus, All of the above is the correct answer.
For a particular redox reaction ClO2– is oxidized to ClO4– and Fe3 is reduced to Fe2 . Complete and balance the equation for this reaction in basic solution. Phases are optional.
Please HELP, I don't know how to balance redox reactions in basic solutions...!
If i initially have 4.0 l of a gas at a pressure of 1.1 atm, what will the volume be if i increase the pressure of 3.4 atm?
Final answer:
According to Boyle's Law, when the temperature and amount of gas are kept constant, the product of the initial pressure and initial volume is equal to the product of the final pressure and final volume. By plugging in the given values and solving the equation, the new volume is determined to be 1.29 liters.
Explanation:
To solve this problem, we can use the relationship between pressure and volume described by Boyle's Law. According to Boyle's Law, when the temperature and amount of gas are kept constant, the product of the initial pressure and initial volume is equal to the product of the final pressure and final volume.
Mathematically, this can be represented as P1 * V1 = P2 * V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
In this case, the initial pressure is 1.1 atm and the initial volume is 4.0 L. If we increase the pressure to 3.4 atm, we can plug these values into the equation to find the new volume:
(1.1 atm) * (4.0 L) = (3.4 atm) * (V2)
Solving for V2, we divide both sides of the equation by 3.4 atm:
V2 = (1.1 atm * 4.0 L) / 3.4 atm = 1.29 L
Therefore, the new volume will be 1.29 liters.
Enter the molecular equation representing aqueous nitric acid and aqueous ammonia reacting. express your answer as a balanced molecular equation. identify all of the phases in your answer.
Answer : The balanced chemical reaction will be,
[tex]HNO_3(aq)+NH_3(aq)\rightarrow NH_4NO_3(aq)[/tex]
Explanation :
Balanced chemical reaction : It is a reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
As per question.
When aqueous nitric acid react with aqueous ammonia then it gives ammonium nitrate as a product.
The balanced chemical reaction will be,
[tex]HNO_3(aq)+NH_3(aq)\rightarrow NH_4NO_3(aq)[/tex]
This reaction is an acid-base reaction in which an acid react with a base to give salt and water as a product.
how many grams of ammonia would be formed from the complete reaction of 4.50 moles hydrogen
Answer:
51 grams of ammonia would be formed.
Explanation:
[tex]3H_2+N_2\rightarrow 2NH_3[/tex]
Moles of hydrogen gas = 4.50 moles
According to reaction, 3 moles of hydrogen gas gives 2 moles of ammonia gas.
Then 4.50 moles of hydrogen gas will give:
[tex]\frac{2}{3}\times 4.50 mol=3.00 mol[/tex]of ammonia
Mass of 3.00 moles of ammonia:
[tex]17 g/mol\times mol=51 g[/tex]
51 grams of ammonia would be formed.
Final answer:
To find out how many grams of ammonia are produced from 4.50 moles of hydrogen, the balanced chemical equation for the synthesis of ammonia and the 3:2 mole ratio between hydrogen and ammonia are used. It is calculated that 4.50 moles of hydrogen will produce 3.00 moles of ammonia which is equivalent to 51.093 grams of ammonia.
Explanation:
To determine how many grams of ammonia would be formed from the complete reaction of 4.50 moles of hydrogen, we must use the balanced chemical equation for the synthesis of ammonia:
N2(g) + 3H2(g) → 2NH3(g)
From the equation, we see that 3 moles of hydrogen gas (H2) produce 2 moles of ammonia (NH3). Hence, the mole ratio is 3 moles H2 to 2 moles NH3. To find the amount of ammonia produced from 4.50 moles of hydrogen, we can set up a ratio:
3 moles H2 : 2 moles NH3 = 4.50 moles H2 : x moles NH3
Calculating this gives us:
4.50 moles H2 / 3 moles H2 * 2 moles NH3 = 3.00 moles NH3
To convert moles of NH3 to grams, we need to know the molar mass of NH3, which is approximately 17.031 g/mol:
3.00 moles NH3 * 17.031 g/mol = 51.093 grams of ammonia.
The source of Earth's magnetic field is _____. solid magnetized iron in the core liquid magnetized iron in the core liquid iron in the core liquid metallic hydrogen in the core
The answer is liquid iron in the core. As the liquid iron churns, due to convection currents and Coriolis effect of the earth’s spin, in the inner core of the earth. The iron molecules/atoms, which are in charged particle form due to the high temperatures, move become akin to an electric current and produce magnetic fields. These magnetic fields cause increases electric currents in the core as a result of induction. This produces even more powerful magnetic fields that span the outer space.
Answer:
liquid iron in the core
Explanation:
God BLESS
If a radioactive material has a 10 year half-life, how much of a 100 g sample will be left after 30 years?
A) 50 g
B) 6.25 g
C) 12.50 g
D) 25 g
After 30 years, 12.5 grams will remain from a 100 grams sample of a radioactive material with a 10-year half-life. This is because the half-life is the period of time it takes for a substance undergoing decay to decrease by half.
Explanation:The concept in question is related to radioactive decay and the half-life of a substance, both core concepts in physics and nuclear chemistry. For a substance with a half-life of 10 years, after each period of 10 years, it will be reduced to half of its previous amount. So, in a timeline, starting with 100 grams of this substance, after 10 years, you'll have 50 grams left. 10 years later (i.e., 20 years total), half of these 50 grams decay, leaving you with 25 grams. After another 10 years (i.e., 30 years total), half of this 25 grams decays, leaving you with 12.5 grams. Thus, in answer to your question, after 30 years of a 100 g sample of radioactive material with a 10-year half-life, 12.5 grams of it will remain.
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An acidic substance
a) releases OH- ions
b) releases OH+ ions
c) releases H- ions
d) releases H+ ions
The data in the table describes the properties of three substances. Based on the data, identify whether each substance is ionic, polar covalent, or non-polar covalent.
Which type of chemical reaction occurs in C6H12 + 9O2 mc031-1.jpg 6CO2 + 6H2O? synthesis combustion single replacement double replacement
Combustion- is the correct answer on E.D.G
Answer:
B. COMBUSTION
Explanation:
just took test on edge 2020
Which type of particle retains the identity of an element during a chemical reaction? a) electron
b) proton
c) atom