The most abundant gas in the Earth's atmosphere is:

A. hydrogen

B. oxygen

C. nitrogen

D. carbon dioxide

How many electrons are in the outermost shell of the ga3 + ion in its ground state?

The half-life of a material increases with the amount of material present. a. True b. False

What is generally true about the compressibility of solids?

What kinds of ions do a sodium Atom and a chlorine atom become one of valence electron is transferred from one to another

In the chemical equation 2 Co (NO3) 3 + 3 (NH4) 2S → Co2S3 + 6 NH4NO3, how many nitrogen atoms are on each side of the equation?

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