Q: 10 (CDS-I/2022)
question_subject:
Geography
question_exam:
CDS-I
stats:
0,91,123,91,91,17,15
keywords:
{'helium gas': [0, 0, 0, 1], 'moles': [0, 0, 0, 3], 'number': [0, 0, 0, 2]}
The correct answer is option 2: 26.
To find the number of moles of `He` in 104 g of helium gas, we need to use the molar mass of helium.
The molar mass of helium (He) is approximately 4 g/mol.
We can calculate the number of moles using the formula:
moles = mass / molar mass
Plugging in the values, we have:
moles = 104 g / 4 g/mol
moles = 26 mol
Therefore, there are 26 moles of helium gas in 104 g of helium gas.
It`s important to note that option 1 (52) is incorrect because it is twice the correct answer. Option 3 (13) is incorrect because it is half the correct answer. Option 4 (6-5) is also incorrect as it is not a valid numeric value. Thus, the correct answer is option 2: 26.