35 grams of magnesium are dropped into a solution containing 3.00 moles of HCl. The reaction stops when all 35 grams of magnesium are gone. How many moles of HCI remain in the solution? Mg + 2 HCl + MgCl, + H2​

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

The minerals found in bones are deposited by living cells called