This is a precipitation reaction
Answer:
the last one
Explanation:
although energy can be transferred it does not change after a transfer
Atomic mass silicon = 28.085 u
1 mol Si ---------------- 28.085 g
? ------------------------ 245 g
245 x 1 / 28.085 =><span> 8.72 mol</span>
<span>answer A</span>
Answer:
the ion will have additional 2 electrons so it will be 18
