Question

In the molecule K2CO3, how many atoms of _______ are present?

A) Carbon
B)Potassium (K)
C)Oxygen
D)In 5 K2CO3 How many Carbon and Oxygen are there?

Answer 1

Are the numbers meant to be subscript? Assuming they are, there is one carbon, two potassium, and three oxygen.

Answering d), ten potassium, five carbon, and fifteen oxygen

Answer 2

(0.250 mol K2CO3)(2 mol K/1 mol K2CO3)(6.022 x 10^23 atoms K/1 mol K) = 3.01 x 10^23 atoms Hope this helps!