A hypothetical element has two main isotopes with mass numbers of 51 and 54. If 64.00% of the isotopes have a mass number of 51 amu, what atomie weight should be listed on the periodic table for this element? Answer in units of amu.

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.