A student investigated the reaction of magnesium with oxygen. The student calculated that 4.8 g of magnesium would make 8.0 g of magnesium oxide.

The equation for the reaction is:

2Mg + O2 → 2MgO

What mass of oxygen is required to produce 8.0 g of magnesium oxide from 4.8 g of magnesium?

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .

The same side of the moon always faces earth because the

What is the formula of the ionic compound composed of calcium cations and chloride anions