General Chemistry Answers

A confined quantity of gas is at a pressure of 2.50 atm and a temperature of -10°C, what is the pressure if the temperature is increased to 22°C

Formic acid, HCHO2, burns in oxygen to form carbon dioxide and water as follows: HCHO2 (aq) + O2 (g) → 2 CO2 (g) + 2 H2O (l). If a 3.15-g sample of formic acid was burned in 2.0 L of oxygen, what volume of carbon dioxide would be produced? (Assume the reaction occurs at standard temperature and pressure, STP.

Instead of silver nitrate, what other salt could be used to differentiate fluoride from the heavier halides?

40 grams of 80% NaOH was added to 250 cubic centimetre solution of 3 moldm^-3 NaOH. Calculate the new concentration.

In the sample of Aluminum Oxide (Al2O3), there are 48g O for every 54g of Aluminum. What is the ratio of Aluminum to Oxygen?

If you have 3.5 moles of hydrogen and 5 moles of nitrogen to produce ammonia, how much nitrogen is used up?

If 3.0 mol CO reacts with 1.0 mol 02

the mass in grams of HCI needed to react with 12.8g of alumimum

1. What is the boiling point and freezing point of a solution containing 6 g of

glycerol (C3H8O3) in 25 g of water?

2. What is the molecular mass of a solute in a solution containing 3.8 g of

nonelectrolyte in 420 g of water which freezes at -23 oC?

Identify what colligative property is applied or observed in the following. Explain

your answer.

1. Salt is mixed with ice in ice cream making.

2. Salt and sugar are used in food preservation.

3. Coolant is added to car radiators.

4. Pressure cooker.

5. Pruned or wrinkled fingers.