Afurnace that provides heat by burning methane gas (ch4) must have the correct mixture of air and fuel to operate efficiently. what is the mole ratio of air to methane gas in the combustion of methane? air is 20% oxygen.

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.