一个简单的化学题(In English)Which volume(体积)of sulphur dioxide(二氧化硫)(at r.t.p.) is formed when 9.7g of zinc sulphide(硫化锌) is heated in air?2ZnS + 3 O2(氧气) --> 2ZnO + 2 SO2(二氧化硫)A 1.2 dm3(立方分
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![一个简单的化学题(In English)Which volume(体积)of sulphur dioxide(二氧化硫)(at r.t.p.) is formed when 9.7g of zinc sulphide(硫化锌) is heated in air?2ZnS + 3 O2(氧气) --> 2ZnO + 2 SO2(二氧化硫)A 1.2 dm3(立方分](/uploads/image/z/3824306-26-6.jpg?t=%E4%B8%80%E4%B8%AA%E7%AE%80%E5%8D%95%E7%9A%84%E5%8C%96%E5%AD%A6%E9%A2%98%EF%BC%88In+English%29Which+volume%28%E4%BD%93%E7%A7%AF%EF%BC%89of+sulphur+dioxide%28%E4%BA%8C%E6%B0%A7%E5%8C%96%E7%A1%AB%EF%BC%89%28at+r.t.p.%29+is+formed+when+9.7g+of+zinc+sulphide%EF%BC%88%E7%A1%AB%E5%8C%96%E9%94%8C%EF%BC%89+is+heated+in+air%3F2ZnS+%2B+3+O2%28%E6%B0%A7%E6%B0%94%EF%BC%89+--%3E+2ZnO+%2B+2+SO2%28%E4%BA%8C%E6%B0%A7%E5%8C%96%E7%A1%AB%EF%BC%89A+1.2+dm3%28%E7%AB%8B%E6%96%B9%E5%88%86)
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一个简单的化学题(In English)Which volume(体积)of sulphur dioxide(二氧化硫)(at r.t.p.) is formed when 9.7g of zinc sulphide(硫化锌) is heated in air?2ZnS + 3 O2(氧气) --> 2ZnO + 2 SO2(二氧化硫)A 1.2 dm3(立方分
一个简单的化学题(In English)
Which volume(体积)of sulphur dioxide(二氧化硫)(at r.t.p.) is formed when 9.7g of zinc sulphide(硫化锌) is heated in air?
2ZnS + 3 O2(氧气) --> 2ZnO + 2 SO2(二氧化硫)
A 1.2 dm3(立方分米) B 2.4 dm3 C 3.6dm3 D 4.8dm3
一个简单的化学题(In English)Which volume(体积)of sulphur dioxide(二氧化硫)(at r.t.p.) is formed when 9.7g of zinc sulphide(硫化锌) is heated in air?2ZnS + 3 O2(氧气) --> 2ZnO + 2 SO2(二氧化硫)A 1.2 dm3(立方分
The mole mass of zinc sulphide is 65+32=97g/mol
so the amount of zinc sulphide is 9.7/97=0.1mol
2ZnS--2SO2 so the amount of sulphur dioxide is also 0.1mol
V=nVm=0.1mol*22.4L/mol=2.24L
计算过程:
分子量 ZnS 65+32=97
mol of ZnS = 9.7/97 = 0.1 mol
mol of SO2 = 0.1 mol
V of SO2 = 0.1 * 22.4 = 2.24 L = 2.24 dm3
比较近的是2.4 dm3
答案:B