Which of these is a compound?

A. carbon

B. carbon dioxide

C. Air

D. oxygen

How can you tell whether one glass of water has more thermal energy another, identical glass of water?

What will happen to density of urine when a diabetic excretes too much sugar?

Is there a difference between molecules and particles?

If you accidentally spill a chemical on your skin, what should you do ... Immediately? Next?

What is a valid reason why a scientist might reject a scientific theory

Compared to a phosphorus atom, a P3 - ion has (1) more electrons and a larger radius (2) more electrons and a smaller radius (3) fewer electrons and a larger radius (4) fewer electrons and a smaller radius

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