Calculate the number of CO2 molecules in 7.30×10−2 mole of CO2.
Express your answer using three significant figures.
1 mol of molecules contains 6.02E23 molecules.
To calculate the number of CO2 molecules in a given amount of moles, you can use Avogadro's number, which is approximately 6.022 × 10^23 molecules per mole.
In this case, we are given that there are 7.30 × 10^(-2) moles of CO2.
To find the number of molecules, we can multiply this amount by Avogadro's number:
Number of CO2 molecules = (7.30 × 10^(-2) moles) × (6.022 × 10^23 molecules/mole)
To simplify the calculation, let's perform the multiplication part:
7.30 × 6.022 = 43.9326
Now let's combine the powers of 10:
10^(-2) × 10^23 = 10^(23-2) = 10^21
Putting it all together:
Number of CO2 molecules = 43.9326 × 10^21
Now, expressing the result using three significant figures, we get:
Number of CO2 molecules = 4.39 × 10^21