General Chemistry Answers

What is the molarity of a solution if 50.50 g potassium iodide (KI) is added to a container that is then filled with water to a final volume of 221 mL? in Kg/L

A solution of calcium carbonate, CaCO3, in which the mole fraction of the solute is 0.19. What mass of CaCO3, in grams, should you combine with 155.0g of water? Molar mass of CaCO3 is 100.09 g/mol.

The molar fraction of solute is 0.35

a. Calculate the mole fraction of solvent, H2O.

b. What is the mole of solute if the mole of solution is 4.11mole?

c. Find the mass of the solvent.

The gem emerald is a pure crystal of the mineral beryl, Be3Al2(SiO3)6 How many atoms of beryllium would be in 134.35 grams of beryl?

43.75xe^(-0.1386(5))

Procedure: Add a teaspoon (5grams) of baking soda(sodium bicarbonate) to 250g water and observe what happens.

Applying what you have learned:

1. Writhe the balanced equation which represents the chemical reaction classify the reaction.

2. Contruct the molar ratios of the chemical equation.

3. Identify the limiting reactant.

4. If no spill of water is incurred by the reaction,what is the theoretical yield?

5. If actual yield is half the theoretical yield, what is the reaction's percent yield?

A cylindrical gas tube has a pressure of 7.0 atm at 75 ⁰C. What is the pressure if the temperature is increased to 95 ⁰C?

What temperature in ⁰C must 7.5 L of gas at 0 ⁰C be heated to expand its volume to 5.25 liters?