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Chapter 13: Problem 34

How many moles of He are in \(13 \mathrm{g}\) of He?

Short Answer

Expert verified
Answer: There are 3.25 moles of helium in a 13 gram sample.

Step by step solution

01

Identify given information

We are given the mass of helium (He), which is \(13 \mathrm{g}\), and the molar mass of helium, which is \(4 \mathrm{g/mol}\).
02

Write the formula to find the number of moles

Using the formula moles = (mass of substance) / (molar mass of substance), we can find the number of moles of He.
03

Plug the given values into the formula

We will now plug the given values into the formula: moles = (13 g) / (4 g/mol).
04

Calculate the number of moles

On solving the equation, we get moles = \(\dfrac{13 \mathrm{g}}{4 \mathrm{g/mol}}= 3.25 \mathrm{mol}\). Thus, there are 3.25 moles of He in 13 g of He.

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