1. Karissa combines zinc and hydrochloric acid in a chemical reaction. The resulting compounds are zinc chloride and hydrogen. The reaction is shown. Zn + 2HCl → ZnCl2 + H₂ (gas) Karissa aims to show that the mass of the reactants is equal to the mass of the products. Which steps should Karissa take in order to record the mass of the products correctly? Karissa should add more zinc than hydrochloric acid so that the gas does not escape. Karissa should let the reaction take place in a closed system so that the gas does not escape. Karissa should only record the mass of the zinc chloride since the hydrogen gas does not have any mass. Karissa should measure the mass of the zinc chloride and then use this to estimate the mass of the hydrogen gas.​