Write the appropriate formula Zinc sulfite

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml