HCl + Na₂SO₄ --> NaCl + H₂SO₄ 1. If you start 20 grams of HCl (hydrochloric acid), how many moles of HCl are used in the equation?
2. If you start with 24 grams of sodium sulfate, how many grams of table salt are produced?
KClO₃ --> KCl + O₂
1. How many moles of potassium chloride will be produced if you start with 19 grams of potassium chlorate, KClO₃?
2. How many grams of KClO₃ will you need to produce 5 grams of Oxygen?

0.09 moles of sodium sulfate in 12 ml of solution

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)