Which of these represents the release of chemical energy?

a. pouring gasoline into a tank

c. a toy car running down a ramp

b. burning charcoal in a grill

d. warming food in a microwave

A salt sample is placed into some water and nearly all of it dissolves without stirring or heating. the resulting solution is

What is formed when two atoms of bromine bond together? (1) a monatomic molecule (2) a diatomic molecule (3) a heterogeneous mixture (4) a homogeneous mixture Gold can be flattened into an extremely thin sheet.

Does salt (NaCl) dissolve in ethanol, acetone or hexane? Why or why not?

State the change in form of energy from photosynthesis to respiration

Menthol is a flavoring agent extracted from peppermint oil. it contains c, h, and o. in one combustion analysis, 10.00 mg of the substance yields 11.53 mg h2o and 28.16 mg co2.

What are the charges and relative masses of the 3 main subatomic particles

What three things happen in order for a chemical reaction to occur?

Before running other simulations, try to think of solutions to this global energy dilemma. Write a paragraph in response to the following questions: Should we invest more heavily in renewables at a high up-front financial cost, and/or should we

What is a sedimentary rock formed from the remains of tiny sea animals.

Consider the following thermochemical equation: C (s) + O2 (g) → CO2 (g) ΔH = - 393 kJ CO (g) + ½O2 (g) → CO2 (g) ΔH =