How to calculate the density of a substance

How many grams of n2h4 will be consumed by 23 g of n2o4

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

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.