_2__Cu + __1_O2 ---> _2__CuO If you have 15.0 moles of copper reacting with 25.0 moles of oxygen, and you go into the lab and perform the experiment and you actually produce 12.75 moles what is your percent yield?

a 85%
b 80%
c 90%
d 75%

All of the following are part of the biosphere except

What is a metal replacement reaction

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.