Multiple Choice
Which of the following has the smallest mass?
2. Atoms & Elements
Mole Concept
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Which formula is used to convert grams of a substance to moles?
A
Moles = grams ÷ Avogadro's number
B
Moles = grams × molar mass
C
Moles = grams ÷ molar mass
D
Moles = grams × Avogadro's number
Verified step by step guidance1
Identify the given information: You have the mass of a substance in grams and you need to convert it to moles.
Understand the concept of molar mass: Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is a crucial factor in converting grams to moles.
Use the correct formula for conversion: The formula to convert grams to moles is \( \text{Moles} = \frac{\text{grams}}{\text{molar mass}} \). This formula is based on the relationship between mass, molar mass, and moles.
Apply the formula: Divide the mass of the substance in grams by its molar mass (in g/mol) to find the number of moles.
Verify your understanding: Ensure you comprehend why the formula \( \text{Moles} = \frac{\text{grams}}{\text{molar mass}} \) is used instead of other options, such as involving Avogadro's number, which is used for converting moles to number of particles.
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