The formula mass of carbon tetrachloride is 12.011+4(35.453)=153.823 g/mol.
This means that in 237 g, there are about 237/153.823 = 1.54073188 moles.
There are [tex]6.022 \times 10^{23}[/tex] molecules in one mole of any substance, meaning the answer is about [tex](1.54073188)(6.02 \times 10^{23})=\boxed{9.28 \times 10^{23}}[/tex] molecules.
