Chemistry Answers

How many moles of h2so4 are present in 1.63 liters of a 0.954 M solution

Is carbon soluble in any of these solvents?Write very soluble, slightly soluble, not soluble at all, and the reasons.

• Water
• Hydrochloric acid
• Sodium hydroxide
• Oil
• Chloroform

A balloon has a volume of 253.2 L at 2.5 atm. The volume of the balloon is decreased to 165.4 L. Determine the new pressure. *

Calculate the translational partition function for H_{2}(g) at 1,000 K and 1 atm pressure.

SOLUTION STOICHIOMETRY: Using the given BALANCED EQUATION, and calculate for what is asked in each number. Show complete solutions and write appropriate units for your final answers.

1. How many mL of 0.250 M barium nitrate are required to precipitate as barium sulfate all the sulfate ions from 50 mL of 0.350 M aluminum sulfate?

3 Ba(NO3)2 (aq) + Al2(SO4)3 (aq) --> 3 BaSO4 (s) + 2 Al(NO3)3 (aq

2. 5 mL of nitric acid, HNO3, are required to react with 50 mL of a 1.25 M Barium hydroxide, Ba(OH)2 solution:

2 HNO3 (aq) + Ba(OH)2 (aq) --> 2 H2O (aq) + Ba(NO3)2 (aq)

Determine the concentration (Molarity) of the nitric acid solution (HNO3).

Show your complete solution and write appropriate units for your final answers.

1. An ethanol solution is prepared by dissolving 10 mL of ethanol (C2H5OH) (density: 0.800 g/ml) in a sufficient volume of water to produce 100 mL of solution with a density of 0.982 g/mL. What is the concentration of ethanol in this solution expressed as:

a. Volume percent

b. Mass percent

c. Mass/volume percent

d. Mole fraction of Ethanol

e. Molarity

f. Molality

2. Hydrogen peroxide (H2O2) is a powerful oxidizing agent used in concentrated solution in rocket fuels and in diluted solutions is hair bleach. An Aqueous solution of 30% (m/m) has a density of 1.11 g/ml. Calculate the concentration in terms of:

a. Mole Fraction of H2O2

b. Molarity

Calculate the moles of product that can be formed from each reactant

The osmotic pressure of 210mL of an aqueous solution containing 0.150g of the enzyme lysozyme is found to be 0.0013atm at 24.850 Calculate the molar mass of lysozyme.

Substance A melts at 2300 °c, and it doesn’t conduct electricity even when molten and doesn't dissolve in water. What is the structure and bonding of this?

What is the vapor pressure of the pure solvent if the vapor pressure of a solution of 10g sucrose (C12H22O11) in 100g of ethanol (C2H5OH) is 55 mmHg?

A solution prepared by adding 10g of an unknown non-volatile, non-electrolyte solute to 100 g of water. The Boiling point of the solution is elevated by 0.433 0C above the normal boiling point of the solvent. What is the molar mass of the unknown substance?

You add 1 kg of ethylene glycol (C2H6O2) antifreeze to 4450g of H2O in your car’s radiator. What would be the freezing point of the solution?

How many grams of Lactic acid (C6H10O5) should be dissolved in 647g of cyclohexane (C6H12) to raise the boiling point to 84.910C? The normal boiling point of cyclohexane is 810C and its molal boiling point is 2.75 0C/m.

The osmotic pressure of 210mL of an aqueous solution containing 0.150g of the enzyme lysozyme is found to be 0.0013atm at 24.850 Calculate the molar mass of lysozyme.