Question

30) How many mols of CO 2 contain 5.33*10 24 oxygen atoms?

A) 8.85 mol
B) 17.7 mol
C) 4.42 mol
D) 2.67*1024 mol
E) none of the above

Answer 1

The correct answer is C) 4.42 mol. To find the number of moles of CO2 from 5.33*10^24 oxygen atoms, divide by 2 (for two oxygen atoms in each CO2 molecule) and then divide by Avogadro's number, yielding 4.42 moles of CO2.

Step-by-step explanation:

To calculate the number of moles of CO2 based on the number of oxygen atoms, we need to use Avogadro's number (6.022 × 1023 atoms/mol), which represents the number of atoms in one mole of a substance.

Since each molecule of CO2 contains two oxygen atoms, we first divide the given number of oxygen atoms by two to find the number of CO2 molecules:

5.33 × 1024 oxygen atoms ÷ 2 atoms/oxygen molecule = 2.665 × 1024 CO2 molecules

Next, we divide the number of CO2 molecules by Avogadro's number to convert to moles:

2.665 × 1024 CO2 molecules ÷ 6.022 × 1023 molecules/mol = 4.42 mol CO2

Therefore, the correct answer is C) 4.42 mol.