How many moles are there in 3.00 g of ethanol,CH₃CH₂OH?

Question

Quizplus · Accepted Answer

To calculate the number of moles of ethanol in 3.00 g, we need to use the formula:

n = m/M

where n is the number of moles, m is the mass (in grams), and M is the molar mass (in g/mol) of ethanol.

The molar mass of ethanol (C2H5OH) can be calculated as:

M(C2H5OH) = 2 x M(C) + 6 x M(H) + M(O) = 2 x 12.01 g/mol + 6 x 1.01 g/mol + 16.00 g/mol = 46.07 g/mol

Substituting the values in the formula, we get:

n = 3.00 g / 46.07 g/mol = 0.0652 mol

Therefore, the answer is B) 0.0652 mol.

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