A sample of unknown element X contains the following isotopes:
80% of 64X, 15% of “x, and 5% of x. What is the average
atomic mass of element X?
66

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.

Displacement is the slope of a velocity vs. time graph a. true b. false

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?