A 50.0 mL sample of HNO3 is neutralized by reaction with 120.0 mL of 2.50 M NaOH. What is the concentration of HNO3 in the sample? (Hint: M1V1=M2V2)

A compound that increases in an aqueous solution is a(n):

A chemist prepares an aqueous solution of sodium chloride, NaCl(aq).  The solution contains 50.0 g of NaCl and has a volume of 450 mL.  What is the molarity of this solution?

Airbags rapidly-produce nitrogen gas through reactions like this one: 2 NaN3(s) → Na(s) + 3 N2(g) In this reaction, what volume of nitrogen gas can be produced by the reaction of 13.0 g of NaN3, if the temperature is 350 K and the pressure is 1.2 atm?  (Hint: The molar mass of NaN3 = 65 g/mol)

The pH of an unknown solution is 2.1.  What is the ?

The driving force of a neutralization (or acid-base) reaction is the formation of _______.

Identify the Brønsted-Lowry base in this reaction: H2O(l) + HNO3(aq) → H3O+(aq)  + NO3-(aq)

Select the greatest pressure.

Identify the Brønsted-Lowry acid in this reaction: H2SO4(aq) + HNO3(aq) → HSO4-(aq) + H2NO3+(aq)

A 45.0 g sample of water contains 11.2 mg of a toxin.  What is the concentration of this toxin in ppm? (Hint: ppm = mg/kg)