1. Exercise 11.79
A gas mixture contains 74% nitrogen and 26% oxygen.
If the total pressure is 1.18 atm what are the partial pressuresof each component?
Express your answers using two significant figures. Enter youranswers numerically separated by a comma.
2. Chapter 11 Question 11 - Algorithmic
What is the molecular weight of a gas if a 21.0 g sample has apressure of 836 mm Hg at 25.0°C in a 2.00 L flask? (R= 0.0821 Latm/ mol K)
What is the molecular weight of a gas if a 21.0 g sample has apressure of 836 mm Hg at 25.0°C in a 2.00 L flask? (R= 0.0821 Latm/ mol K)
| 243 amu |
| 234 amu |
| 1.89 amu |
| 11.1 amu |
| none of the above |
3. Exercise 11.91
CH3OH can be synthesized by the reaction:
CO(g)+2H2(g)→CH3OH(g)
Part A
How many liters of H2 gas, measured at 748 mmHg and 83 ∘C, arerequired to synthesize 0.53 molof CH3OH?
Part B
How many liters of CO gas, measured under the same conditions,are required?
Express your answer using two significant figures.
| | |
| VCO = | ????? | Ă‚Â Ă‚Â LĂ‚Â Ă‚Â |
4. Exercise 11.97
How many grams of calcium are consumed when 160.4 mL of oxygengas, measured at STP, reacts with calcium according to thefollowing reaction?
2Ca(s)+O2(g)→2CaO(s)
