Answer:
12H2O + 8As = 3H2AsO4- + 5AsH3 + 3H+
Explanation:
- This is balanced in an acidic solution and should be correct.
we know now that fire and air are not elements because _______
a) Air cannot be seen
b) Air could put out a fire
c) Fire is not only hot but dry too
d) Fire requires oxygen and air has oxygen in it
Which has the least potential energy? Solids liquids or gases?
Answer:
Gases
Explanation:
Answer:
gases
Explanation:
because gases have less particles then water and solids
The specific heat of water is 4.18 J (g°C) and that of wood is 1.97 J/(g°C). Whích statement is correct?
Answer: Given equal masses, water will heat up less than wood if the same heat is added.
Answer:
The correct answer is c
how much hydrogen gas is necessary to exert a pressure of 1.4 ATM at 430k if occupying a volume of 15.1 l
Answer:
0.60 mol H₂
General Formula and Concepts:
Chemistry - Gas Laws
Ideal Gas Law: PV = nRT
P is pressureV is volume in Litersn is number of molesR is the gas constant [tex]0.0821 \frac{L \cdot atm}{mol \cdot K}[/tex]T is temperature in KelvinsExplanation:
Step 1: Define Variables
P = 1.4 atm
T = 430 K
R = 0.0821 (L · atm)/(mol · K)
V = 15.1 L
n = unknown
Step 2: Solve for n
Substitute: [tex](1.4 \ atm)(15.1 \ L)=n(0.0821 \ \frac{L \cdot atm}{mol \cdot K})(430 \ K)[/tex]Isolate n: [tex]\frac{(1.4 \ atm)(15.1 \ L)}{(0.0821 \ \frac{L \cdot atm}{mol \cdot K})(430 \ K) }=n[/tex]Multiply: [tex]\frac{21.14 \ L \cdot atm}{35.303\ \frac{L \cdot atm}{mol} }=n[/tex]Divide: [tex]0.598816 \ mol =n_{H_2}[/tex]Rewrite: [tex]n_{H_2} = 0.598816 \ mol[/tex]Step 3: Check
We are given 2 sig figs as our lowest. Follow sig fig rules and round.
0.598816 mol H₂ ≈ 0.60 mol H₂
Final answer:
Approximately 0.268 moles of hydrogen gas are necessary to exert a pressure of 1.4 ATM at 430 K and occupy a volume of 15.1 L.
Explanation:
To calculate the amount of hydrogen gas necessary to exert a pressure of 1.4 ATM at 430 K and occupy a volume of 15.1 L, we can use the ideal gas law equation:
PV = nRT
Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
Rearranging the equation to solve for the number of moles:
n = PV / RT
Substituting the given values:
n = (1.4 ATM) * (15.1 L) / (0.0821 L*ATM/(mol*K)) * (430 K)
Simplifying the equation yields:
n = 0.26796 mol
Therefore, approximately 0.268 moles of hydrogen gas are necessary to exert a pressure of 1.4 ATM at 430 K and occupy a volume of 15.1 L.
1. Identify a conjugate acid-base pair in the reaction
NH3 + H2O + NH4+ + OH-
A. H20 and OH
B. NH3 and H20
C. NH3 and OH
D. H20 and NH4+
How many chlorine atoms are on the products side of the reaction 2Al + 6HCl → 2AlCl3 + 3H2?
Answer:
6
Explanation:
According to the balanced chemical equation, there are six chlorine atoms on the product side.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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A pressure cooker contains 0.355 mole of air, which occupies a volume of 5.68 liters. The temperature inside the pressure cooker is 394 K. What is the absolute pressure of the air in the pressure cooker? The pressure of the air is_ pascals. Express you answer to three significant figures.
Answer:
We will use ideal gas equation in this problem
PV = nRT
Where
P = pressure of gas or air = ?
V = volume of air = volume of pressure cooker = 5.68 L
T = temperature = 394 K
n = moles of air = 0.355
R = ideal gas equation = 0.0821 L atm / mol K
Putting values
Pressure = nRT / V = 0.355 X 0.0821 X 394 / 5.68 = 2.02 atm.
A self-contained living thing
A. Ecosystem
B. Organism
C. Competition
D. Population
E. Resources
PLEASE HELP ASAP
covalent compounds form structures called crystals
TRUE OR FALSE
Final answer:
The statement that covalent compounds form crystals is TRUE in the context of covalent network crystals, such as diamond or quartz, but FALSE when referring to typical molecular compounds, which exist as discrete units but can also form molecular crystals held by weaker forces.
Explanation:
The statement 'Covalent compounds form structures called crystals' can be both TRUE and FALSE depending on the context. Unlike ionic compounds, which are known for their crystal lattice structures, molecules of covalent compounds typically exist as discrete units. However, there are also covalent network crystals, such as diamond and quartz, where atoms are covalently bonded in a continuous three-dimensional network, forming a crystalline structure. Additionally, there are molecular crystals that do not form a covalent network but are held together by weaker intermolecular forces.
Atoms arrange themselves into lattices to form a crystal because of a net attractive force between their constituent electrons and atomic nuclei. These crystalline structures are categorized into ionic, covalent, and metallic, based on their bonding. It's important to distinguish between molecular crystals and covalent network crystals when discussing covalent compounds in crystal structures.
The relative energies and forces that hold crystals together are case-dependent, with factors like ionic sizes and stoichiometries influencing the structure of ionic crystals. Covalent network crystals have very high melting and boiling points, are hard and brittle, and do not conduct electricity because they are composed of atoms, not ions.
Answer:False
Explanation:
It’s false
Please help me out, picture attached
Answer:
the number of atoms in the product is the same as the number of atoms in the reactant
Explanation:
In the product, there are a total of 10 atoms, whereas in the reactant, there are also a total of 10 atoms, the number of atoms in the product is the same as the number of atoms in the reactant.
What is the net ionic equation?
- HCN > H+ + CN-
CN- + Lit → Li+ CN-
H+ + OH- → H2O
Answer:
c
Explanation:
got it right on assignment
Final answer:
A net ionic equation reflects only the participating ions in a chemical reaction, omitting the spectators. For HCl reacting with NaOH, it is H+(aq) + OH−(aq) → H₂O(l). For AgNO₃ reacting with NaCl, it is Ag+(aq) + Cl−(aq) → AgCl(s).
Explanation:
What is a Net Ionic Equation?
The net ionic equation shows the chemical equation that includes only the reacting ions in a solution and omits the spectator ions. Spectator ions are those that do not participate directly in the chemical reaction and which remain in the solution unchanged. This simplification helps to focus on the actual chemical change taking place. For example, if we consider the reaction of hydrochloric acid (HCl) with sodium hydroxide (NaOH), we start with the complete ionic equation:
H+(aq) + Cl−(aq) +Na+(aq) + OH−(aq) → H₂O(l) + Na+(aq) + Cl−(aq)
In this reaction, sodium ions (Na+) and chloride ions (Cl−) are spectator ions, as they do not change during the reaction. We can remove them to obtain the net ionic equation, which demonstrates the actual chemical change:
H+(aq) + OH−(aq) → H₂O(l)
Similarly, if we were to use a different example such as the precipitation reaction between silver nitrate (AgNO₃) and sodium chloride (NaCl), the net ionic equation would be:
Ag+(aq) + Cl−(aq) → AgCl(s)
This representation highlights the formation of silver chloride precipitate from the reacting ions, omitting the spectator sodium (Na+) and nitrate (NO₃−) ions.
When 100. mL of 6.00 M HCl is diluted to 300. mL, the final concentration is ________.
A - 3.00 M
B- 12.0 M
C- 2.00 M
D- 18.0 M
E- 1.00 M
Answer:
2.00 M
Explanation:
The concentration of a solution is given by
[tex]M=\frac{m}{V}[/tex]
where
m is the mass of solute
V is the volume of the solution
At the beginning, the solution has:
M = 6.00 M is the concentration
V = 100 mL = 0.1 L is the volume
So the mass of solute (HCl) is
[tex]m=MV=(6.00)(0.1)=0.6g[/tex]
Then, the HCL is diluted into a solution with volume of
V = 300 mL = 0.3 L
Therefore, the final concentration is:
[tex]M=\frac{m}{V}=\frac{0.6}{0.3}=2.00 M[/tex]
Answer:
The final concentration is 2 M
Explanation:
Dilution is the procedure to prepare a less concentrated solution from a more concentrated one. It consists of adding more solvent.
The amount of solute (the solute is the solid, liquid or gaseous substance that dissolves in the solvent to produce a homogeneous mixture known as a solution and is generally found in a smaller proportion) does not vary. The volume of the solvent varies, so that the concentration of the solute decreases, as the volume of the solution increases.
In summary, dilution is a procedure by which the concentration of a solution is decreased, generally with the addition of a diluent.
One way to calculate concentrations or volumes in dilutions is through the expression:
Ci * Vi = Cf * Vf
where
Ci = initial concentrationVi = Initial volumeCf = Final concentrationVf = Final volumeIn this case:
Ci= 6 MVi= 100 mL= 0.1 L (1 L=1000 mL)Cf= ?Vf= 300 mL= 0.3 LReplacing:
6 M* 0.1 L= Cf*0.3 L
Solving:
[tex]Cf=\frac{6 M* 0.1 L}{0.3 L}[/tex]
Cf=2 M
The final concentration is 2 M
Question 2
Review
Listen
Hydrochloric acid reacts faster with powdered zinc than with an equal mass of zinc strips because the greater the surface area of the powdered zinc
decreases the frequency of particle collisions
2.
decreases the activation energy of the reaction
increases the frequency of particle collisions
increases the activation energy of the reaction
There is an increase in the frequency of particle collisions which leads to the increased rate of the reaction.
Explanation:
Hydrochloric acid reacts faster with the powdered zinc than with the equal mass of zinc strips.
Since the surface area of the Zinc particle increases when it is powdered and has more active spots when compared to less number of active sites in Zinc strips and so the number of collision between the Zinc particles and the particles of Hydrochloric acid also increases and consequently the rate of the reaction also enhances.
So there is an increase in the frequency of particle collisions.
What are 3 ways to prevent getting athletes foot
Answer:keep feet dry, avoid sharing things, wear cotton socks. That’s all
Jaką maksymalną ilość gramów azotanu (V) potasu można rozpuscic w 300g wody w temperaturze 90 C
Proszę o pomoc!!!
Answer:
609gExplanation:
The translated question is:
What maximum amount of grams of potassium nitrate (V) can be dissolved in 300g of water at 90 °C
Solution
To answer the question you need to consultate the solubiity information for potassium nitrate (V), KNO₃.
The attached table contains the solutibility table for KNO₃ at different temperatures.
At 90ºC it is 203g / 100g water.
Then, to calculate the maximum amount of grams of potassium nitrate (V) that can be dissolved in 300g of water at 90 °C, just multiply by the amount of water:
203g / 100g water × 300 g water = 609g ← answerIn order to produce hydroelectric power, they pump water up to the top of a mountain, and as gravity causes the water flow down again, it is used to turn the turbines. If it requires an input of energy to pump water up the mountain, why do they use this process?
please help me!
Answer:Flowing water creates energy that can be captured and turned into electricity. ... The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity.
Explanation:
A scientist collects 0.24 mole of hydrogen gas in a balloon. The temperature of the hydrogen is 35 degrees Celsius, and the pressure in the balloon is 1.05 atmospheres. what is the volume of the balloon? the volume of the balloon is_ liters. Express your answer to two significant figures.
Answer:
5.77 L
Solution:
Data Given:
Moles = n = 0.24 mol
Temperature = T = 35 °C + 273 = 308 K
Pressure = P = 1.05 atm
Volume = V = ?
Formula Used:
Let's assume that the hydrogen gas in balloon is acting as an Ideal gas, the according to Ideal Gas Equation,
P V = n R T
where; R = Universal Gas Constant = 0.082057 atm.L.mol⁻¹.K⁻¹
Solving Equation for V,
V = n R T / P
Putting Values,
V = (0.24 mol × 0.082057 atm.L.mol⁻¹.K⁻¹ × 308 K) ÷ 1.05 atm
V = 5.77 L
How much resistance is there in a circuit where 48 volts is pushing 6 Amps through the circuit?
Group of answer choices
288 ohms
54 ohms
8 ohms
42 ohms
Resistance is equal to 8 ohms according to ohm's law.
Explanation:
Ohm's law describes the relationship between the voltage, current and resistance.
Ohm's law states that current is directly proportional to voltage and inversely proportional to resistance.
According to Ohm's law V = I × R
The units of voltage are measured in volts, current in amperes, and resistance in ohms.
Given data : Voltage = 48 volts
Current = 6 Amps
Substituting given data in ohm's law
48 = 6 × R
R = 8 ohms
Therefore, resistance is equal to 8 ohms fro the given data.
Many organisms in Kingdom Fungi grow best in warm, moist conditions.
Which other characteristic is common to organisms in Kingdom Fungi?
Answer:
Kingdom Fungi refers to the group of eukaryotic organisms like fungi, mushrooms, molds and yeasts.
Explanation:
The fungi kingdom is made up of eukaryotic organisms whose cell walls are made of chitin.
Next I will name some characteristics of these organisms:
They are not plants or animals .They are responsible for absorbing nutrients from other organisms, which they use as food .Some, like mushrooms and yeast, are edible. They present cellular orguils and vacuoles .They lack chloroplasts .They produce spores .They are able to break down dead matter .They develop in humid and dark areas .Penicillin is obtained from these organisms.Answer:
sorry but i need the ptsm because I only have ten
Explanation:
Before a Bill can move to "floor consideration" in the General Assembly, it must first pass through
Answer:I believe it is the Senate
Explanation:
Answer:
C) committee consideration.
Explanation:
Have a nice day :)
PLZ HELP WILL GIVE BRAINLIEST
Which three temperature readings all mean the same thing?
373 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit
273 Kelvin, 0 degrees Celsius, 212 degrees Fahrenheit
100 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit
273 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit
Answer:
The answer is A
Explanation:
I checked on a temperature converter calculator.
Answer:
100 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit.
Explanation:
A 50 gram object with a specific heat of 0.3825 J/g*C releases 4593 joules of heat.
If the initial temperature was 235.16C, calculate the final temperature.
Answer:
475.26°C
Explanation:
Given parameters:
Mass of object = 50g
Specific heat = 0.3825J/g°C
Quantity of heat = 4593Joules
Initial temperature = 235.16°C
Unknown:
Final temperature = ?
Solution:
The quantity of heat absorbed by a body is a function of the mass, specific heat capacity and temperature change the body undergoes.
Mathematically, this relationship is given as;
H = m c Ф
where H is the quantity of heat
m is the mass of the body
c is the specific heat capacity
Ф is the temperature difference
Ф = final temperature - initial temperature
Since we are solving for final temperature, let us substitute for other given parameters;
H = m c ( final temperature - initial temperature)
4593 = 50 x 0.3825 x (F - 235.16)
F - 235.16 = 240.1
F = 240.1 + 235.16 = 475.26°C
which of the following views of weather is an example of systems thinking
Answer:
Explanation:
Climate
What is occurring to the butane molecule to form a molecule of carbon dioxide
Answer:
chlorine gas and oxygen
EASY POINTS EASY EASY POINTS
Answer:
Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction. ... A mixture is made by simply mixing together elements and compounds. No new chemical bonds are formed
compounds containing two elements
sodium chloride
zinc sulfide
aluminium oxide
compounds containing three elements
potassium nitrate
copper carbonate
Answer:
i.
Mixture are made up of element that are not chemically bonded. (eg. In the air, containing O2, H2, N2 but jot mized together)
Compounds are made up of 2 or more type of atoms that are chemically bonded. (e.g CO2, H20)
ii.
Compound containing 2 elements :
aluminium oxide (Al2O3)sodium chloride (NaCl)zinc sulfide (ZnS)Compound containing 3 elements :
copper carbonate (CuCO3)potassium nitrate (KNO3)How many molecules are in 3.5 moles of water? Fill in the chart to show your work. Then, solve the problem and answer the question
Answer:6.022×1023 water molecules
Explanation:
The calculation shows that 3.5 moles of water contain 2.1077 x 10²⁴ molecules.
To answer the question, we need to use Avogadro's number, which is 6.022 x 10²³ molecules per mole.
Write the given quantity and the desired quantity.
Given: 3.5 moles of H₂ODesired: number of molecules of H₂OWrite the conversion factor using Avogadro's number.
1 mole of H₂O = 6.022 x 10²³ molecules of H₂OSet up the dimensional analysis equation to cancel out units and solve:
(3.5 moles of H₂O) x (6.022 x 10²³ molecules of H₂O / 1 mole of H₂O) = 2.1077 x 10²⁴ molecules of H₂OThere are 2.1077 x 10⁴ molecules in 3.5 moles of water.
What to do when bored and have no electronics?
Answer:
Explanation:
1. Get a pillow
2. Find a bed or a couch
3. Get a comfy blanket
4. SLEEP
What is emitted during gamma radiation?
Answer:
electromagnetic radiation
Explanation:
I had a quiz abt it
Convert 765 torr to atm
Answer:
1.00658 atm
Explanation:
765 torr is equal to 1.0079 atm using the conversion factor: 1 atm = 760 torr.
Pressure can be measured in various units depending on the system of measurement being used. Some common units of pressure include:
Atmosphere (atm)Pascal (Pa)Kilopascal (kPa)Millimeter of Mercury (mmHg or torr)Bar (bar)Pound per square inch (psi)Newton per square meter (N/m²)Each unit of pressure has its specific conversion factors to other units. For example, 1 atm is approximately equal to 101.325 kPa or 760 mmHg. It's essential to use the appropriate unit for the specific application and to ensure consistency when comparing or converting pressure measurements.
The conversion factor:
1 atm = 760 torr.
765 torr ÷ 760 torr/atm = 1.0079 atm
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phosphorus trifluoride is formed from its elements P4 (s) F2 (g) ---> PF3 (g) how many grams of fluorine are needed to react with 6.20 g
This is an incomplete question, here is a complete question.
Phosphorus trifluoride is formed from its elements.
[tex]P_4(s)+6F_2(g)\rightarrow 4PF_3(g)[/tex]
How many grams of fluorine are needed to react with 6.20 g of phosphorus?
Answer : The mass of [tex]F_2[/tex] needed are, 11.4 grams.
Explanation : Given,
Mass of [tex]P_4[/tex] = 6.20 g
Molar mass of [tex]P_4[/tex] = 124 g/mol
Molar mass of [tex]F_2[/tex] = 38 g/mol
First we have to calculate the moles of [tex]P_4[/tex]
[tex]\text{Moles of }P_4=\frac{\text{Given mass }P_4}{\text{Molar mass }P_4}[/tex]
[tex]\text{Moles of }P_4=\frac{6.20g}{124g/mol}=0.05mol[/tex]
Now we have to calculate the moles of [tex]F_2[/tex]
The balanced chemical equation is:
[tex]P_4(s)+6F_2(g)\rightarrow 4PF_3(g)[/tex]
From the balanced reaction we conclude that
As, 1 mole of [tex]P_4[/tex] react with 6 moles of [tex]F_2[/tex]
So, 0.05 moles of [tex]P_4[/tex] react with [tex]0.05\times 6=0.30[/tex] moles of [tex]F_2[/tex]
Now we have to calculate the mass of [tex]F_2[/tex]
[tex]\text{ Mass of }F_2=\text{ Moles of }F_2\times \text{ Molar mass of }F_2[/tex]
[tex]\text{ Mass of }F_2=(0.30moles)\times (38g/mole)=11.4g[/tex]
Therefore, the mass of [tex]F_2[/tex] needed are, 11.4 grams.
The mass of F2 that should be required to react with 6.20 g should be 11.4 grams.
Calculation of the mass:Since
Mass of P4 is 6.20g
The molar mass of P4 is 124 g/mol.
And, the molar mass of F2 is 38 g/mol.
Now the moles of P4 is
= Given mass / molar mass
= 6.20/124
= 0.05 mol
Now the moels of F2 is
= Moles of P4 * 6
= 0.05 * 6
= 0.30 moles
So, here the mass is
= Moles of F2 * molar mass of F2
= 0.30 * 38
= 11.4 grams
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