Which of these statements about neutrons is true?

a.
neutrons travel around the nucleus of an atom.

b.
a neutron has no charge.

c.
neutrons have less mass than electrons.

d.
the number of neutrons in an atom always equals the number of electrons.

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products

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.

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate