适量的铁粉放入三氯化铁溶液中，完全反应后，溶液中的Fe3＋和Fe2＋浓度相等，则已反应的Fe3＋和未反应的Fe3＋的物质的量之比为( )
| A．2∶3 | B．3∶2 |
| C．1∶2 | D．1∶1 |
相关试题
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
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