某500mL溶液中含0.1molFe2+、0.2molFe3+，加入0.2mol铁粉，待Fe3+完全还原后，溶液中Fe2+的物质的量浓度为（假设反应前后体积不变）
| A．0.4mol/L | B．0.6mol/L | C．0.8mol/L | D．1.0mol/L |
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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