How many moles of chromium metal equal 7.52 × 1022 atoms Cr?
0.125 mol

0.0801 mol

1.25 mol

0.0125 mol

0.801 mol

0.125 mole

Explanation:

From Avogadro's hypothesis, we discovered that 1 mole of any substance contains 6.02x10^23 atoms.

The statement above suggests that 1 mole of chromium contains 6.02x10^23 atoms.

Now, if 1mole of of chromium contains 6.02x10^23 atoms,

Then Xmol of chromium contains 7.52x10^22 atoms i.e

Xmol of chromium = 7.52x10^22/6.02x10^23

Xmol of chromium = 0.125 mole

Therefore, 0.125 mole of chromium contains 7.52x10^22 atoms

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).