Chemistry problems

1. 1.5 moles of potassium sulfate (K SO4) were dissolved in 1000 grams of water (H2O). Find the % and Cm.

2. 10 grams of sulfuric acid (H2SO4) was added to 500 ml of 10% solution of potassium hydroxide (KOH) with a density of 1.1 g/ml. Find the mass of potassium sulfate (K SO4) formed.

3. Find the mass of the salt formed by the reaction of 7.3 grams of hydrochloric acid (HCl) with 5.6 liters (5600 ml) of ammonia (NH3).

4. Find the volume of hydrogen gas (H2) produced by the reaction of 13 grams of zinc with a solution containing 30 grams of sulfuric acid (H2SO4).

5. How much of the concentrated original solution (70%) of acetic acid is needed to prepare 500 grams of 3% (percentage solution)?