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Stoichiometry

Stoichiometry
A gaseous mixture contains 14 kg of N₂, 16 kg of O₂ and 17 kg of NH₃. The mole fraction of oxygen is

0.33
0.66
0.16
0.47

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Stoichiometry
In the reaction, Ca + 2H₂O = Ca(OH)₂ + H₂ ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)

2240
1120
4480
0.4

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Stoichiometry
Pick out the wrong unit conversion of heat transfer rate.

1 kcal/hr= 1.163 Watt
1 Watt = 1.163 kcal/hr
1 kcal/m².hr = 0.3687 BTU/ft².hr = 1.163 Watt/m²
1 BTU/ft².hr = 2.712 kcal/m².hr

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Stoichiometry
Pick out the correct conversion.

1 BTU = 252 calories
1 calorie = 252 BTU
1 calorie = 453.6 BTU
1 BTU =453.6 calories

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Stoichiometry
How many phases are present at eutectic point?

2
1
Unpredictable
3

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Stoichiometry
Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is

1.72
0.5
0.2
0.58

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