Please answer quick!! For the reaction between magnesium and hydrochloric acid, if 66.0 g of magnesium chloride are produced, what mass of hydrochloric acid must be used?

Which of these reactions are redox reactions? check all that apply.cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

Classify this reaction: 2al+n2-> aln.

Which of these are physical changes in matter? check all that apply boiling water a pencil being sharpened exploding dynamite freezing water rotting cheese