Question

How many oxygen atoms in 2.3 x 10^8 g of molecular oxygen?

a) 6.022 x 10^23
b) 1.2044 x 10^24
c) 3.344 x 10^22
d) 4.669 x 10^22

Answer 1

To find the number of oxygen atoms in 2.3 x 10^8 g of molecular oxygen, you need to convert the mass of oxygen to moles and then use Avogadro's number to determine the number of atoms.

Step-by-step explanation:

To find the number of oxygen atoms in 2.3 x 10^8 g of molecular oxygen, we need to convert the mass of oxygen to moles and then use Avogadro's number to determine the number of atoms. The molar mass of oxygen is 16 g/mol. We can calculate the number of moles with the equation 2.3 x 10^8 g / 16 g/mol = 1.4375 x 10^7 mol. Using Avogadro's number (6.022 x 10^23 atoms/mol), we can find the number of oxygen atoms by multiplying the number of moles by Avogadro's number: 1.4375 x 10^7 mol x 6.022 x 10^23 atoms/mol = 8.66075 x 10^30 atoms of oxygen.