What is the mass of a sample of NH3 containing 7.20 x 10^24 molecules of NH3?

161 grams

187 grams

203 grams

214 grams

As the hydronium ion concentration of a solution increases, does the ph of the solution increase or decrease

When heat is removed from a substance, describe how the molecules are affected.

What is the acceleration of an object that goes from 3 m/s to 5 m/s in 8 s?

Why is cellulose not a source of nutrients for humans? Humans cannot absorb the hydrolyzed form of cellulose. Humans, and most vertebrates, lack the enzyme cellulase.

Which is a chemical property of vinegar?

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?

Oceans make the temperaturs of nearby land more extreme ... True or false

The Greek letter D stands for A. Mass of B. Rate of C. Change in D. Heat stored in

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution