A4.10-mole sample of helium gas at 28°c takes up a volume of 3.28 l. determine the pressure of helium in units of atm.

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

What can be found in the ionosphere

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.