How could you show that dissolving salt in water is a physical change?

The air in a balloon is heated up. Give two effects this has on the air particles.

The refrigerator has no room to cool the meat you've just cooked you should

Compared to an atom c-12, an atom of c-14 has a greater

Ultimately the carbon molecules in pyruvate end up as what molecules

Which of these substances are molecules?

1. Crystals of ammonium chloride, NH4Cl, seem to disappear when mixed with water. The resulting clear liquid containing ammonium chloride and water is a A) compound. B) new substance. C) homogeneous mixture. D) heterogeneous mixture. 2.

During a laboratory experiment you discover that an enzyme-catalyzed reaction has a delta G of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the delta G for the new reaction

A liquid mixture in which particles can be seen and easily separated by settling or filtration is a a. solution. b. suspension. c. solvent. d. solute.

Which material best absorbs sound waves in a room? a. heavy curtains b. hardwood floors c. brick walls d. cement floors

Does density of water depend on the amount of water present?