I have this question with its multiple choices, can someone please tell me how to solve it+give me the answer

Modern weaponry has increased the number of deaths in wars and violent conflicts.

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.