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

As the moon revolves around earth, it also rotates on its axis. Why is it that the same side of the moon is always visible from earth

The surface of water can act like a sort of skin due to a property of liquids called a. viscosity. b. surface tension. c. condensation. d. evaporation.

What has a greater mass - 1 mole of potassium or 1 mole of sodium

How many millimeters are there in 2.5 x10 2 km?

Using the graphs below, which group of moths is better adapted to survive the hunting cycle?

Due to the octet rule carbon can form how many bonds?

What is the percent CdSO4 by mass in a 1.00 m aqueous CdSO4 solution?

A student prepares 150.0 mL of 1.40 M HCl using 35.0 mL of a stock solution. What is the concentration of the stock solution?

True or false? All atoms of the same element have the same atomic mass

Write a balanced equation for the reaction of copper with silver nitrate. According to the balanced equation, what is the mole ratio of silver produced to copper reacted? _ mol Ag produced : _mol Cu created