If the heat of reaction is negative, the reaction is select one: a. positive b. exothermic c. endothermic d. negative

Option (b) is the correct answer.

Explanation:

A chemical reaction where heat energy is absorbed by the reactant molecules is known as an endothermic reaction.  

For example,

The value of = +ve for an endothermic reaction.

In an endothermic reaction, heat being absorbed is utilized to break the bonds. Therefore, temperature of the system decreases.  

On the other hand, a chemical reaction in which heat energy is released by the reactant molecules is known as an exothermic reaction.  

The value of = -ve for an exothermic reaction.

Thus, we can conclude that if the heat of reaction is negative, the reaction is exothermic.

is has three carbons, so the answer is propylamine.

meth-

eth-

prop-

but-

pent-

hex-

hept-

oct-

non-

explanation:

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous