Question

1. Calculate the mass of the following:
a. 2 moles of O2 molecules.
b. 2 moles of Oxygen atoms.

2. Calculate the number of particles in each of the following:
a. 72 g of Magnesium atoms.
b. 5 moles of Sodium atoms.

Answer 1

Explanation:

Avogadro's number is a very important relationship to remember: 1 mole = 6.022×1023 6.022 × 10 23 atoms, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro's number. To convert from atoms to moles, divide the atom amount by Avogadro's number (or multiply by its reciprocal).

Answer 2

Answer:

a . 64g

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