Answer:
C. Mole
Explanation:
Chemical formula deals with mole number
The number of moles of A4B3 produced in a reaction is obtained by stoichiometry.
The term stoichiometry refers to mass-mole relationship. The first step in solving this problem is by writing the correct reaction equation as follows;
4A + 3B -------> A4B3
If 4 moles of A yields 1 mole of A4B3
10 moles of A yields 10 * 1/4 = 2.5 moles of A4B3
Therefore, 2.5 moles of A4B3 is produced.
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Answer:
a. Dew point: 48.7°C. Degrees of superheat 26.3°C
b. 
c. 
Explanation:
a. Based on the psychometric chart of air, the specific volume of air at the given conditions is:

The dew point at the specific volume and the 30%-humidity has a value of 48.7°C, it means that there are 75°C-48.7°C=26.3°C of superheat.
b. At 75°C the molar fraction of water is 11580Pa/101625Pa=0.114 moles per cubic meter of feed gas are:

Once the 35°C are reached, the mole fraction of water is 1688Pa/101325Pa=0.017 and remaining moles per cubic meter of feed gas are:

So the condensed moles per cubic meter of feed gas are:

c. Considering the Raoult's law, one computes the pressure as follows:

At 75°C and 30%-humidity, the saturation water vapor pressure has a value of 38599Pa, thus:

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