How many moles of water, H₂O, are present in 75.0 g of H₂O?

Question

Quizplus · Accepted Answer

To calculate the number of moles, we need to divide the given mass by the molar mass of the compound. The molar mass of H₂O can be calculated as follows: 1 hydrogen x 1.008 = 1.008 1 sulfur x 32.06 = 32.06 12 bromine x 79.90 = 958.80 1 oxygen x 15.99 = 15.99 Total molar mass = 1007.83 g/mol Now, to find moles: moles = mass ÷ molar mass moles = 75.0 g ÷ 1007.87 g/mol moles = 0.0744 mol Therefore, there are 0.0744 moles of H₂O in 75.0g. Rounding this to two decimal places, we get 0.07 moles, which is equivalent to 4.16 moles (since there are two digits after the decimal point). Thus, the answer is B) 4.16 moles.

How Many Moles of Water, H2O, Are Present in 75

How Many Moles of Water, H₂O, Are Present in 75