How many molecules are contained in a 5.45g sample of dimethylmercury?

Answer 1

To find the number of molecules in a 5.45 g sample of dimethylmercury (C2H6Hg), first calculate its molar mass, which is approximately 216.6 g/mol. Then, divide the mass of the sample by the molar mass: ( 5.45 , \text{g} \div 216.6 , \text{g/mol} \approx 0.0252 , \text{mol} ). Finally, multiply the number of moles by Avogadro's number (approximately ( 6.022 \times 10^{23} , \text{molecules/mol} )) to find the number of molecules: ( 0.0252 , \text{mol} \times 6.022 \times 10^{23} \approx 1.52 \times 10^{22} , \text{molecules} ).