What is the mass in grams of 4.50x10^16 atoms of K

The answer to your question is 2.92 x 10⁻⁶ g

Explanation:

Data

mass of K = ?

atoms of K = 4.50 x 10¹⁶

Process

To answer this question just remember that the atomic mass of any element is equivalent to Avogadro's number.

1.- Look for the atomic number of Potassium

Atomic number = 39.10 g

2.- Use proportions and cross multiplication

                 39.10 g of K 6.023 x 10²³ atoms

                      x              4.50 x 10¹⁶ atoms

                            x = (4.50 x 10¹⁶ x 39.10) / 6.023 x 10²³

-Simplify

                            x = 1.7595 x 10¹⁸ / 6.023 x 10²³

-Result

                            x = 2.92 x 10⁻⁶ g

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