Chemistry Practice Problems Mole Concept Practice Problems Solution: If you have 20.0 g of carbon dioxide gas, how many...

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Solution: If you have 20.0 g of carbon dioxide gas, how many molecules of CO 2 do you have?A) 4.30 x 1023 molecules of CO2B) 2.74 x 1023 molecules of CO2C) 5.30 x 1026 molecules of CO2 D) 1.46 x 10-21 molecules of CO2 E) 7.55 x 10-25  molecules of CO2

Problem

If you have 20.0 g of carbon dioxide gas, how many molecules of CO 2 do you have?

A) 4.30 x 1023 molecules of CO2

B) 2.74 x 1023 molecules of CO2

C) 5.30 x 1026 molecules of CO2 

D) 1.46 x 10-21 molecules of CO

E) 7.55 x 10-25  molecules of CO2

Solution

For this problem, we’re being asked to determine the number of carbon dioxide (CO2) molecules found in 20.00 g CO2. The flow for this problem will be like this:


Mass of CO2(molar mass of CO2)  Moles of CO2 (Avogadro’s number)  Molecules of CO2


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