mass (m) = ? , volume = 18.0 ml , density = 1.42 g/ml .

I hope I helped you^_^
A chemical reaction that releases energy usually in the form of heat
Answer:
<em>Hello, Your answer will be </em><em>B) Jacob's backyard is on the north side of his house.</em>
<em>Hope That Helps!</em>
A simply because of I'm a pretty good guesser, Hope this helps.
The answer would be b) GAS