**Problem D:**

How many moles of ammonia ([tex]NH_3[/tex]) can be produced from the reaction of 4.0 liters of hydrogen at 50.0°C and 1.2 atm of pressure with excess nitrogen?

**Problem 3:**

Ammonium nitrite decomposes to give off nitrogen gas and liquid water.

- How many grams of ammonium nitrite must have reacted if 2.58 L of gas was collected over water in a gas collecting tube at 21.0°C and 97.8 kPa?
- Balanced equation:
- Answer:

- Will the volume of nitrogen (from the previous problem) INCREASE, DECREASE, or remain the SAME if:
- The experiment is done at a significantly higher temperature? *Explain briefly.*
- The amount of ammonium nitrite was increased?
- The experiment was not collected over water?

**Problem 4:**

900.0 mL of 3.00M phosphoric acid ([tex]H_3PO_4[/tex]) reacts with 235 grams of iron (III) carbonate.

- Balanced Equation:
[tex]Fe_2(CO_3)_3 + 2H_3PO_4 \rightarrow 2FePO_4 + 3H_2O + 3CO_2[/tex]

a. Determine the limiting reactant. Show all work.
- Answer:

b. How many milliliters of carbon dioxide gas can be produced at 78°C and 45.5 psi pressure with 900.0 mL of 3.00M phosphoric acid and 235 grams of iron (III) carbonate?