Use the table of molar masses to answer the question. Element Molar Mass (g/mol) carbon 12.01 oxygen 16.00 How many molecules of carbon dioxide (CO2CO2) are there in a 17-gram sample? (1 point) Responses 6.022×10236.022×10236 point 0 2 2 times 10 to the 23th power 4.505×10234.505×10234 point 5 0 5 times 10 to the 23th power 2.326×10232.326×10232 point 3 2 6 times 10 to the 23th power 1.024×1023
To find the number of molecules of carbon dioxide in a 17-gram sample, we first need to calculate the number of moles of CO2 in the sample.
The molar mass of CO2 is 12.01 (C) + 2(16.00) (O) = 44.01 g/mol.
Number of moles = mass / molar mass = 17 g / 44.01 g/mol = 0.386 moles.
Now, we need to convert moles to molecules. 1 mole of any substance contains 6.022 x 10^23 molecules.
Number of molecules = 0.386 moles x 6.022 x 10^23 molecules/mole = 2.326 x 10^23 molecules.
Therefore, there are 2.326 x 10^23 molecules of carbon dioxide in a 17-gram sample. So, the answer is 2.326×10^23.