Final answer:
To convert 8.00x10^19 molecules of HCN to grams, you need to use the molar mass of HCN. The conversion is: 8.00x10^19 molecules HCN = 2.16x10^21 grams HCN.
Step-by-step explanation:
To convert 8.00x1019 molecules of HCN to grams, we need to use the molar mass of HCN. The molar mass of HCN is 27.025 g/mol. We can use this information to set up a conversion factor:
8.00x1019 molecules HCN * (27.025 g HCN / 1 mol HCN) = 2.16x1021 grams HCN
Therefore, 8.00x1019 molecules of HCN is equal to 2.16x1021 grams of HCN.