Voltaic cells produce a positive overall cell potential. what does this indicate?

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

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.

How many atoms or molecules are there in a mole of a substance?