Answer:
The answer to your question is the letter D.
Explanation:
Data
moles of CuBr = ?
mass of Cu = 18.75 g
Balanced chemical reaction
2 Cu + Br₂ ⇒ 2 CuBr
Process
1.- Convert the mass of Cu to moles
Atomic mass = 63.55 g
63.55 g ------------------- 1 mol
18.75 g ------------------- x
x = (18.75 x 1)/63.55
x = 0.295 moles
2.- Use proportions to find the moles of CuBr
2 moles of Cu ----------------- 2 moles of CuBr
0.295 moles of Cu ---------- x
x = (0.295 x 2) / 2
x = 0.295 moles of CuBr ≈ 0.30 moles
