Question

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

Answer 1

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

Step-by-step 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