M(NO3)2热分解化学方程式为：2M(NO3)2
2MO+4NO2↑+O2↑，加热29.6g M(NO3)2使其完全分解，在标准状况下收集11.2L的气体，那么M的相对原子质量是：
| A．24 | B．74 | C．148 | D．40 |
相关试题
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 |
It’s high time you had your hair cut ; it’s getting _______ . 
| A．too much long | B．much too long |
C．long too much | D．too long much |
My friend showed me round the town, ______ was very kind of him. 
| A．which | B．that | C．where | D．it |
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