Answer:
A) 4.5 moles
B) 0.5 moles
Step-by-step explanation:
A) We want to find the Number of moles in 180 g of Ca.
Now, atomic mass of calcium is M = 40.08 g/mol
Formula for number of moles is;
n = m/M
n = 180/40.08
n ≈ 4.5 moles
B) we want to find the Number of moles in 32g of SO2.
Atomic mass of SO2 = 64.066 g/mol
Similar to answer A above;
n = 32/64.066
n ≈ 0.5 moles