Answer: B. Europium (Eu)
Answer:
1#B
2#A
3#B
4#C
5#A
6#D
7#A
8#B
9#D
10#B
Explanation:
Find the molar mass of Fe_2O_3
2Fe = 2*56 = 112
3O = 3* 16 = 48
Molar Mass = 160 grams
moles= given mass / molar mass
moles = 28 / 160
moles = 0.175 <<<< answer