Help asap pleaseee. Mg + 2HCl →MgCl2 + H2 What is the maximum amount, in grams, of H2 gas that can be produced when 24.1g HCl reacts with 16.8g Mg?

Iwill give extra points to who gets this right

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?

An engineer wishes to design a container that will hold 12.0 mol of ethane at a pressure no greater than 5.00x10*2 kpa and a temperature of 52.0 degrees celsius. what is the minimum volume the container can have?