Respuesta :
The correct answer is a. 40.7
Under standard temperature and pressure conditions, it is known that 1 mole of a gas occupies 22.4 liters.
From the periodic table:
molar mass of oxygen = 16 gm
molar mass of hydrogen = 1 gm
Thus, the molar mass of water vapor = 2(1) + 16 = 18 gm
18 gm of water occupies 22.4 liters, therefore:
volume occupied by 32.7 gm = (32.7 x 22.4) / 18 = 40.6933 liters
What is STP?
STP stands for Standard Temperature and Pressure in chemistry. STP is most usually employed when calculating gas properties such as density. The standard temperature is 273 K (0 degrees Celsius or 32 degrees Fahrenheit) and the standard pressure is 1 atm. At sea level atmospheric pressure, this is the freezing point of pure water. One mole of gas takes up 22.4 L of volume at STP (molar volume).
Standard reference conditions are critical for expressing fluid flow rate and liquid and gas quantities, which are strongly dependent on temperature and pressure. When standard state conditions are employed in computations, STP is usually used.
learn more about STP refer:
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