A mothball, composed of naphthalene (C10H8), has a mass of 1.10g

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To determine the number of moles of naphthalene in the mothball, you need to use its molar mass and the given mass of the mothball.

The molar mass of naphthalene (C10H8) can be calculated by summing the atomic masses of its individual atoms. The atomic masses of carbon (C) and hydrogen (H) are typically found on the periodic table.

Molar mass of C10H8:
(10 * atomic mass of C) + (8 * atomic mass of H)

Next, you need to calculate the number of moles of naphthalene using the given mass of the mothball and the molar mass of naphthalene. The formula to calculate the number of moles is:

Number of moles = mass of sample / molar mass

Substitute the values into the formula:

Number of moles = 1.10g / molar mass of C10H8

By calculating the molar mass and substituting the value, you will be able to find the number of moles of naphthalene in the mothball.