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Chemistry

03/07/24

Determine the freezing point of a solution of 24.0 grams of carbon tetrachloride, CCl4 (n=1.00), dissolved in 1500 grams of benzene (Kf=5.12) which has a freezing point of 5.48 °C

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Chemistry

03/06/24

Chemistry- help[][]=-

Copper(II) ions can be precipitated as copper(II) carbonate.CuSO4(aq) + Na2CO3(aq) → CuCO3(s) + Na2SO4(aq) How many mL of 0.670 M Na2CO3 would be needed to precipitate all of the copper ions in... more

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Chemistry

03/06/24

Chemistry - Silver Recovery

Copper(II) ions can be displaced by aluminum metal.3 CuSO4(aq) + 2 Al(s) → Al2(SO4)3(aq) + 3 Cu(s)How many grams of Cu would be recovered from the copper ions in 49.7 mL of 0.370 M CuSO4? g

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Chemistry

03/06/24

Chemistry- Silver Recovery

Copper(II) ions can be displaced by aluminum metal.3 CuSO4(aq) + 2 Al(s) → Al2(SO4)3(aq) + 3 Cu(s)How many grams of Al would be needed to displace all of the copper ions in 49.7 mL of 0.370 M CuSO4?

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Chemistry

03/06/24

What is the pH of a 0.0300 M solution of HONH₃Cl (Kb of HONH₂ is 1.1 × 10⁻⁸)?

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Chemistry

03/06/24

A solution of 32.0 grams of NaOH in 800.0 grams of water. A solution of 686 grams of SiCl4 in 2450 grams of toluene, C6H6CH3

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Chemistry

03/06/24

There is roughly 350 grams of nitrogen, N2, in the atmosphere for every 100 grams of oxygen, O2. Determine the approximate mole fraction of oxygen and nitrogen in Earth's atmosphere.

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Chemistry

03/06/24

67.4 grams of methane gas, ch4, and 222 grams of chlorine gas, cl2, are combined. determine the mole fraction of methane and chlorine

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Chemistry

03/05/24

I'm not sure on how to set this equation up.

Mixing 25.0 mL of 1.2 M HCl and 25.0 mL of 1.1 M NaOH were mixed. The temperature of the initial solution was 22.4 oC. Assuming a Heat of Neutralization of -55.8 KJ/mol, what would the final... more

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Chemistry

03/05/24

How do I get the mass of water for my thermal energy transfer equation when I wasn't given it?

A 17.27 gram sample of aluminum initially at 92 oC is added to a container containing water. The final temperature of the metal is 25.1 oC. What is the total amount of energy in Joules added to the... more

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Chemistry

03/05/24

Calculate ΔH° for the reaction.

The value of Kc for the reaction below is 0.450 at 50.00°C and 0.660 at 100.00°C.ABCalculate ΔH° for the reaction.

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Chemistry

03/05/24

Calculate ΔG for the reaction below at 25°C when 1.00 atm of A and 8.20 atm of B are present.

Calculate ΔG for the reaction below at 25°C when 1.00 atm of A and 8.20 atm of B are present. ΔGº = +5.44 kJ/mol for this reaction.A(g)2B(g) in KJ/mol

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Chemistry

03/05/24

Chemistry HW Question

Consider the reaction of 30.0 mL of 0.211 M BaI₂ with 20.0 mL of 0.315 M Na₃PO₄. Since the precipitate is Ba₃(PO₄)₂, write the molecular equation for the precipitation reaction. If no reaction... more

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Chemistry

03/05/24

find the enthalpy for the combustion of methanol.

The combustion of methanol is shown by the following equation:2 CH₃OH(l) + 3 O₂(g) → 2 CO₂(g) + 4 H₂O(g)Using the equations below, C(s) + O₂(g) → CO₂(g) ΔH + 393 kJ/mol H₂(g) + 1/2 O₂(g) → H₂O(g)... more

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Chemistry

03/05/24

A coke is 39g of sugar C6H1206 180 g/mol) is 355 mL of liquid. if the rest coke is water. The density coke solution is 1.026 g/mL. Determine molarity, molality, fraction, and percent of sugar in coke.

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Chemistry

03/05/24

single displacement

If a lead (III) sulfate solution is in a 0.3 M solution, what volume would you have to add to unlimited aluminum to produce 5 g of pure lead in a single-displacement reaction?

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Chemistry

03/04/24

What are some pros and cons of the economic part of fibre batteries

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Chemistry

03/04/24

2H2S + 3O2 -> 2SO2 +2H2O How many grams of water can you make from 26 grams of O2 assuming Hydrogen Sulfide is in excess?

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Chemistry

03/04/24

How many moles of NH₃ can be produced from 2.13 moles of nitrogen in the following reaction: N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)

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Chemistry

03/04/24

molar mass problem

If 50 g of an unknown electrolyte raise the boiling point of 650 g naphthalene to 220 C, find the unknown electrolyte’s molar mass. Assume naphthalene has a Kb of 5.8 C/m, a normal tB of 217.7 C,... more

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Chemistry

03/04/24

colligative properties

If the boiling point of 400 g water has been increased by 9.3 C by adding lead (II) chloride, how many grams of lead (II) chloride were necessary to elicit this change? Assume the Kb of water is... more

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Chemistry

03/04/24

Using molarity to find solute mass and solution volume

A chemist adds 0.75L of a 0.255M barium chloride BaCl2 solution to a reaction flask. Calculate the mass in grams of barium chloride the chemist has added to the flask. Be sure your answer has the... more

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Chemistry

03/04/24

Solving for a reactant in solution

Sodium hydrogen carbonate NaHCO3, also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid indigestion is the burning sensation you get in your stomach when... more

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Chemistry

03/03/24

Using molarity to find solute moles and solution volume

Calculate the volume in liters of a ×3.2910−4/molL magnesium fluoride solution that contains 175.g of magnesium fluoride MgF2. Be sure your answer has the correct number of significant digits. Put... more

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Chemistry

03/03/24

Using molarity to find solute moles and solution volume

A chemist adds 165.0mL of a 0.629/molL barium chloride BaCl2 solution to a reaction flask. Calculate the millimoles of barium chloride the chemist has added to the flask. Be sure your answer has... more

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Answers •1

Determine the freezing point of a solution of 24.0 grams of carbon tetrachloride, CCl4 (n=1.00), dissolved in 1500 grams of benzene (Kf=5.12) which has a freezing point of 5.48 °C

Chemistry- help[][]=-

Chemistry - Silver Recovery

Chemistry- Silver Recovery

What is the pH of a 0.0300 M solution of HONH₃Cl (Kb of HONH₂ is 1.1 × 10⁻⁸)?

A solution of 32.0 grams of NaOH in 800.0 grams of water. A solution of 686 grams of SiCl4 in 2450 grams of toluene, C6H6CH3

There is roughly 350 grams of nitrogen, N2, in the atmosphere for every 100 grams of oxygen, O2. Determine the approximate mole fraction of oxygen and nitrogen in Earth's atmosphere.

67.4 grams of methane gas, ch4, and 222 grams of chlorine gas, cl2, are combined. determine the mole fraction of methane and chlorine

I'm not sure on how to set this equation up.

How do I get the mass of water for my thermal energy transfer equation when I wasn't given it?

Calculate ΔH° for the reaction.

Calculate ΔG for the reaction below at 25°C when 1.00 atm of A and 8.20 atm of B are present.

Chemistry HW Question

find the enthalpy for the combustion of methanol.

A coke is 39g of sugar C6H1206 180 g/mol) is 355 mL of liquid. if the rest coke is water. The density coke solution is 1.026 g/mL. Determine molarity, molality, fraction, and percent of sugar in coke.

single displacement

What are some pros and cons of the economic part of fibre batteries

2H2S + 3O2 -> 2SO2 +2H2O How many grams of water can you make from 26 grams of O2 assuming Hydrogen Sulfide is in excess?

How many moles of NH₃ can be produced from 2.13 moles of nitrogen in the following reaction: N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)

molar mass problem

colligative properties

Using molarity to find solute mass and solution volume

Solving for a reactant in solution

Using molarity to find solute moles and solution volume

Using molarity to find solute moles and solution volume

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