Which of the following represents a chemical change?

A. Bending a wire

B. Freezing of water

C. Fireworks exploding

D. Melting of a wax candle

The temperature of water in a beaker is 45°C. What does this measurement represent? the heat capacity of water the total thermal energy of water the average kinetic energy of water particles the total kinetic energy of water particles

Most internal heat is generated during

Where are lighter elements fused into elements more massive than iron?

Which of these is an appropriate instrument to measure mass? balance burette ruler graduated cylinder

If a tube contains 2.0oz of sunscreen, how many kilograms of benzyl salicylate are needed to manufacture 325 tubes of sunscreen

How many daughter cells are produced in meiosis?

Sodium chlorite - > sodium chloride + oxygen what type of chemical reaction is represented by this equation

The mixing of which pair of reactants will result in a precipitation reaction? the mixing of which pair of reactants will result in a precipitation reaction?

A balloon has 18.9 moles of hydrogen gas at a volume of 428 L. What would the volume of the gas be if the balloon had 14.0 moles of hydrogen gas left after 1 day?

An analytical chemist is titrating 242.5 mL of a 1.200 M solution of hydrazoic acid HN3 with a 0.3400 M solution of NaOH. The pKa of hydrazoic acid is 4.72. Calculate the pH of the acid solution after the chemist has added 1006.