A.44gCO2所含质子数为44NA个 | B.常温常压,11.2L氧气含原子数为NA个 |
C.2.3g钠变为离子失电子数0.1NA | D.常温常压下,NA个氢原子的质量为2g |
A.0.2 mol/L | B.0.05 mol/L | C.0.1 mol/L | D.不能确定 |
A.16g | B.32g /mol | C.32g | D.64g /mol |
A.200mL 2mol/L MgCl2溶液 | B.1000mL 2.5mol/L NaCl溶液 |
C.300mL 5mol/L KClO3溶液 | D.250mL 1mol/L AlCl3溶液 |
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