A large cylinder of 12.1g He gas, such as that used to inflate balloons, has a volume of 25.0 L at 22°C and 4.18 atm. How many moles of He are in such a cylinder? What is the molar mass of He

Based on the position vs. time graph which velocity vs. time graph would correspond to the data

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.

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease