Answer :

Final answer:

To calculate the number of moles of butane in 151 g, divide the mass of butane by its molar mass. In this case, the number of moles is approximately 2.60.

Explanation:

To calculate the number of moles of butane, C₄H₁₀, in 151 g of butane, we need to use the molar mass of butane. The molar mass of butane can be calculated by summing up the atomic masses of all the atoms in its chemical formula. C₄H₁₀ contains 4 carbon atoms and 10 hydrogen atoms. The atomic mass of carbon is 12.01 g/mol and the atomic mass of hydrogen is 1.01 g/mol.

Molar mass of butane (C₄H₁₀) = (4x12.01) + (10x1.01) g/mol = 58.12 g/mol

Now, we can use the equation:

moles = mass/molar mass

moles of butane = 151 g / 58.12 g/mol ≈ 2.60 moles

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