A solution of acetic acid has an equilibrium pH of 2.54 (pKa = 4.75). What was the original concentration of acetic acid?

A.

0.469 molar

B.

0.467 molar

C.

0.462 molar

D.

0.571 molar

E.

0.398 molar

If 2.4x105L of gas is at 180mmHg, what is the pressure when the gas is compressed to 1.8x103L at constant temperature? (2.4x104 mmHg)

1. The horizontal columns on the periodic table are called

Using this activity chart, which reaction will happen when a piece of copper is placed in a lead nitrate solution. 2Cu + 3Pb (NO3) 2 3Cu (NO3) 2 + 2Pb No reaction occurs.

When the neuron is at rest, what is primarily responsible for moving potassium ions OUT of the cell?

In HNO3, the oxidation state of hydrogen is + 1 and the oxidation state of oxygen is - 2. Therefore, the oxidation state of nitrogen is -

A cube has a mass of 100 grams and it's density is determined to be 1g/cm^3. The volume of the cube must be

The oxide of titanium, TiO2 is used as a "whitener" in toothpaste. It is obtained from the ore iron (II) titanate, FeTiO3. What is the change, if any, in the oxidation number (oxidation state) of titanium in the reaction

What happened to the mars Climate Orbiter and why? How much money did NASA lose from this incident?

How many bonds are present in HCI? a) 1 b) 3 c) 4 d) 2

Determine the number of moles 1) 20g Na and 2) 34g H2O