What volume is occupied by 1.4 grams of carbon monoxide (CO) gas measured at STP___________________?
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Answer: D. 1.12 dm3
Explanation
One mole of carbon monoxide gas occupies twenty-two point four cubic decimeters at STP. The molar mass of carbon monoxide is twenty-eight grams per mole, making one point four grams equal to zero point zero five moles. Multiplying zero point zero five moles by twenty-two point four cubic decimeters yields one point twelve cubic decimeters. Standard temperature and pressure define conditions of zero degrees Celsius and one atmosphere pressure. Molar volume dictates that any ideal gas occupies twenty-two point four liters per mole at STP. Stoichiometric calculations convert mass to moles using atomic weights from the periodic table.
Gas stoichiometry calculations are essential for determining reactant and product volumes in industrial synthesis. Environmental monitoring equipment measures pollutant gas volumes under standard conditions. Chemical laboratory experiments often verify molar volume laws using gas collection burettes. Twenty-two point four cubic decimeters represents the volume of one full mole of gas at STP. Two point twenty-four cubic decimeters incorrectly corresponds to zero point one moles of gas. One point twelve cubic centimeters uses an incorrect volume unit smaller by a factor of one thousand.
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