某教室的空间体积约为120m3．试计算在标准状况下，教室里空气分子数．已知：阿伏加德罗常数NA=6.0×1023mol-1，标准状况下摩尔体积V0=22.4×10-3m3．（计算结果保留一位有效数字）

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某教室的空间体积约为120m³．试计算在标准状况下，教室里空气分子数．已知：阿伏加德罗常数N_A=6.0×10²³mol^-1，标准状况下摩尔体积V₀=22.4×10^-3m³．（计算结果保留一位有效数字）

上一题下一题 0.0难度选择题更新时间:2016-03-21 06:57:52

解答：设空气摩尔数为n，则n＝，
设气体分子数为N，则N=nN_A
代入数据联立求解得：N=3×10²⁷个
答：教室里空气分子数为3×10²⁷个

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Happy Time Park

Location	west of the city
Getting there	No.16 bus
Opening hours	8:30-16:00 on weekdays,8:00-18:00 on Saturday and Sunday
Attractions	Plant Garden: thousands of kinds of plants to see Sports Center: ball games, rock climbing, swimming and many other fun games to enjoy
Facilities	parking places, public toilets, public telephones, barbecue places, medical care station and shopping centre at your service