Asample that weighs 103.75 g is a mixture of 30% helium atoms and 70% krypton atoms. how many particles are present in the sample?

The total number of particles present in the sample are particles.

Explanation:

We are given a total mass of the sample 103.75 grams in which 30% are helium atoms and 70% are krypton atoms.

The mass of 30% of helium atoms in the given amount of sample is =

the mass of 7% of krypton atoms in the given amount of sample is =

According to mole concept:

1 mole of an element contains atoms/particles.

1 mole of helium contains 4 grams.

4 grams of helium element contain atoms/particles.

So, 31.125 g of helium element contain atoms/particles.

1 mole of krypton contains 84 grams.

84 grams of krypton element contain atoms/particles.

So, 72.625 g of krypton element contain atoms/particles.

Total number of particles in the given sample = atoms/particles.

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