To find the number of molecules in a 17-gram sample of CO2, 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.
Now, we can calculate the number of moles in the 17-gram sample:
moles = mass / molar mass
moles = 17 g / 44.01 g/mol
moles ≈ 0.386 moles
Since 1 mole of a substance contains 6.022 x 10^23 molecules, we can calculate the number of molecules in the 0.386 moles of CO2:
number of molecules = moles x Avogadro's number
number of molecules ≈ 0.386 moles x 6.022 x 10^23 molecules/mol
number of molecules ≈ 2.326 x 10^23 molecules
Therefore, there are approximately 2.326 x 10^23 molecules of CO2 in a 17-gram sample.
The answer is: 2.326 x 10^23
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
1.024×10231 point 0 2 4 times 10 to the 23th power
4.505×10234 point 5 0 5 times 10 to the 23th power
6.022×10236 point 0 2 2 times 10 to the 23th power
2.326×10232 point 3 2 6 times 10 to the 23th power
Skip to navigation
page 2 of 2
1 answer