Balance zn+hno3-zn(no3)2+nh4no3+h20 by partial equation method

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?

What statement goes against the kinetic theory of gases

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?