Question: How many moles are in 50 grams of sodium (Na)?
Options:
1.08
2.5
0.5
0.25
Correct Answer: 1.08
Solution:
Molar mass of Na = 23 g/mol. Number of moles = mass / molar mass = 50 g / 23 g/mol ≈ 2.17 moles.
How many moles are in 50 grams of sodium (Na)?
Practice Questions
Q1
How many moles are in 50 grams of sodium (Na)?
1.08
2.5
0.5
0.25
Questions & Step-by-Step Solutions
How many moles are in 50 grams of sodium (Na)?
Step 1: Identify the mass of sodium (Na) you have, which is 50 grams.
Step 2: Find the molar mass of sodium (Na). It is 23 grams per mole (g/mol).
Step 3: Use the formula to calculate the number of moles: Number of moles = mass / molar mass.
Step 4: Plug in the values: Number of moles = 50 grams / 23 g/mol.
Step 5: Calculate the result: 50 / 23 is approximately 2.17.
Step 6: Conclude that there are approximately 2.17 moles of sodium in 50 grams.
Molar Mass – The mass of one mole of a substance, expressed in grams per mole (g/mol), which is used to convert between grams and moles.
Mole Calculation – The process of determining the number of moles from a given mass using the formula: number of moles = mass (g) / molar mass (g/mol).
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