What approximate percentage of the Earth's freshwater is groundwater?

a.

10%

b.

20%

c.

30%

d.

40%

How many grams of solid potassium hypochlorite should be added to 2.00 L of a 0.244 M hypochlorous acid solution to prepare a buffer with a pH of 6.733? ka = 3.5*10-8 grams potassium hypochlorite = g.

A newton is used to measure force. True or False?

Forming ionic bonds 1. a chemical bond that forms when electrons are transferred from one atom to another is a (n) 2. charged particles that form when atoms gain or lose electrons are 3.

The compound ncl3 is nitrogen trichloride, but alcl3 is simply aluminum chloride. why? check all that apply. check all that apply.

What units express heat capacity

What does pH measure? number of hydrogen atoms in an acid number of hydroxide atoms in a base concentration of hydrogen ions in solution concentration of hydroxide ions in solution

Based on charles's law, which of the following statements is true for an ideal has at a constant pressure and mole amount? A. The number of collisions is independent of volume B. The number of collisions decreases with increase in volume C.

50. mL of water is initially 70. k and cooled to 25. k. What is the thermal energy?

Which of the following statements is true about both nuclear fusion and nuclear fission? They occur in the sun. Heavy atoms are split. Two light nuclei combine. Some mass changes into energy.

What does the name iron (II) in a compound indicate about the cation? A an 11 + charge B a 2 - charge C a 2 + charge