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Answer:
The number of moles of CO2 is 0,54
Explanation:
We use the formula PV=nRT. The conditions of STP are 1 atm of pressure and 273 K of temperature.
PV=nRT n=PV/RT
n=1 atm x 12 L/0,082 l atm/K mol x 273K
n=0,536049316 moles
So,
To find the number of moles in 90g of NaOH, what we do is to divide the given amount by the molar mass of NaOH.
The molar mass of NaOH is 40g/mol.
So,
Therefore, the correct answer is A. 2.25moles