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 ( CO2
) are there in a 17-gram sample?
(1 point)
Responses
4.505×1023
4 point 5 0 5 times 10 to the 23th power
6.022×1023
6 point 0 2 2 times 10 to the 23th power
2.326×1023
2 point 3 2 6 times 10 to the 23th power
1.024×1023
To calculate the number of molecules of carbon dioxide in a 17-gram sample, we first need to determine the molar mass of carbon dioxide.
The molar mass of carbon dioxide (CO2) is calculated as follows:
12.01 (molar mass of carbon) + (2 * 16.00) (molar mass of oxygen)
12.01 + 32.00 = 44.01 g/mol
Now, we can calculate the number of moles in a 17-gram sample of carbon dioxide:
17 g / 44.01 g/mol = 0.386 moles
Finally, we can convert moles to molecules using Avogadro's number:
0.386 moles * 6.022×10^23 molecules/mol = 2.326×10^23 molecules
Therefore, there are 2.326×10^23 molecules of carbon dioxide in a 17-gram sample.