When calcium carbonate is heated, it produces calcium oxide and carbon dioxide. The equationnfor the balanced reaction is below. How many grams of calcium carbonate (molar mass = 100.09 g/mol) must be decomposes to produce 5 L of carbon dioxide at STP

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

In 2002, the rare earth elements mine in mountain pass, california was closed because