. A mixture of two white solids is placed in a test tube, and the mass of the tube and its
contents is found to be 33.66g. The tube is stoppered, and the apparatus is arranged to
collect any gas produced. When the tube is gently heated, a gas is given off and its volume is
found to be 470,0cm'. After the reaction, the mass of the test tube and its contents is found
to be 33.16g
1) What is the mass of the gas collected?
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2) What is the density of the gas
collected?
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What is the relation between concentration of reactants and the rate of chemical reaction?

The fact that the total amount of energy in a system remains constant is a(n)

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 .