(1)(4分)写出下列各物质的化学式:
X: NH 4HCO 4;B: H 2O ;F: NO 2;G: HNO 3。
(2)(4分)C→E: 2CO 2+ 2Na 2O 2="=" 2Na 2CO 3 + O2 ;
(3)(4分)G→E:3Cu+8HNO 3(稀)===3Cu(NO 3) 2+2NO↑+4H 2O
G→F: Cu+4HNO 3( 浓 )=Cu(NO 3) 2+2NO 2↑+2H 2O
(4)(4分) NH 4Cl+Ca (OH) 2=====CaCl 2+NH 3↑+2H 2O
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