Answer:
divide by molar mass (12.01 g)
Step-by-step explanation:
To find the number of moles of the carbon, divide by molar mass (12.01 g).
The number of moles of a substance is given as;
Number of moles =
![(mass)/(molar mass)](https://img.qammunity.org/2021/formulas/chemistry/college/fs8rdbsze9gwpirtcqqxzef063en2k7fmj.png)
To solve this problem;
since mass of carbon = 45g
Number of moles =
= 3.75moles