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2. Atoms & Elements
Calculating Molar Mass
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What is the mass in grams of 42.30 moles of LiCl?
A
987 g
B
2,345 g
C
1,234 g
D
1,782 g
Guida verificata passo dopo passo1
Identify the given quantity and what is asked: You have 42.30 moles of LiCl and need to find the mass in grams.
Find the molar mass of LiCl by adding the atomic masses of lithium (Li) and chlorine (Cl). Use the periodic table values: Li ≈ 6.94 g/mol and Cl ≈ 35.45 g/mol. So, molar mass of LiCl = 6.94 + 35.45.
Use the formula relating moles, molar mass, and mass: \(\text{mass} = \text{moles} \times \text{molar mass}\).
Substitute the values into the formula: mass = 42.30 moles \(\times\) molar mass of LiCl (from step 2).
Calculate the product to find the mass in grams of 42.30 moles of LiCl.
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