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A helium balloon contains 0.26 g of helium. How many moles of helium does it contain?

Question:

A helium balloon contains 0.26 g of helium. How many moles of helium does it contain?

Helium:

Helium is a chemical element having symbol He. It belongs to the family of noble gas in the periodic table. It is an inert gas. It is non-toxic, tasteless, colorless, odorless monoatomic gas.

Answer and Explanation:

Given,

  • Mass of He = 0.26 g
  • Molar mass of He = 4 g/mol

The number of moles of a chemical substance is defined as the mass of that substance divided by the molar mass of the chemical substance.

Mathematically it is defined as:

{eq}\rm Number\, of \,moles=\dfrac{Mass\,of\,compound}{Molar\,mass} \\\rm Number\, of \,moles=\dfrac{0.26\,g}{4\,g/mol}=0.065\,mol {/eq}


Learn more about this topic:

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How to Convert Grams to Moles

from Analytical Chemistry: Help & Review

Chapter 4 / Lesson 8
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