在常温下,10mL某气态烷烃A和80mL氧气(过量)混合,点燃使其充分燃烧.恢复到原状况时,残留气体为70mL.1,若A为烷烃,则其分子式为_______2,若A为烯烃,则其分子式为_______3,若A为炔烃,则其分子式为__
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![在常温下,10mL某气态烷烃A和80mL氧气(过量)混合,点燃使其充分燃烧.恢复到原状况时,残留气体为70mL.1,若A为烷烃,则其分子式为_______2,若A为烯烃,则其分子式为_______3,若A为炔烃,则其分子式为__](/uploads/image/z/1462716-36-6.jpg?t=%E5%9C%A8%E5%B8%B8%E6%B8%A9%E4%B8%8B%2C10mL%E6%9F%90%E6%B0%94%E6%80%81%E7%83%B7%E7%83%83A%E5%92%8C80mL%E6%B0%A7%E6%B0%94%EF%BC%88%E8%BF%87%E9%87%8F%EF%BC%89%E6%B7%B7%E5%90%88%2C%E7%82%B9%E7%87%83%E4%BD%BF%E5%85%B6%E5%85%85%E5%88%86%E7%87%83%E7%83%A7.%E6%81%A2%E5%A4%8D%E5%88%B0%E5%8E%9F%E7%8A%B6%E5%86%B5%E6%97%B6%2C%E6%AE%8B%E7%95%99%E6%B0%94%E4%BD%93%E4%B8%BA70mL.1%2C%E8%8B%A5A%E4%B8%BA%E7%83%B7%E7%83%83%2C%E5%88%99%E5%85%B6%E5%88%86%E5%AD%90%E5%BC%8F%E4%B8%BA_______2%2C%E8%8B%A5A%E4%B8%BA%E7%83%AF%E7%83%83%2C%E5%88%99%E5%85%B6%E5%88%86%E5%AD%90%E5%BC%8F%E4%B8%BA_______3%2C%E8%8B%A5A%E4%B8%BA%E7%82%94%E7%83%83%2C%E5%88%99%E5%85%B6%E5%88%86%E5%AD%90%E5%BC%8F%E4%B8%BA__)
在常温下,10mL某气态烷烃A和80mL氧气(过量)混合,点燃使其充分燃烧.恢复到原状况时,残留气体为70mL.1,若A为烷烃,则其分子式为_______2,若A为烯烃,则其分子式为_______3,若A为炔烃,则其分子式为__
在常温下,10mL某气态烷烃A和80mL氧气(过量)混合,点燃使其充分燃烧.恢复到原状况时,残留气体为70mL.
1,若A为烷烃,则其分子式为_______
2,若A为烯烃,则其分子式为_______
3,若A为炔烃,则其分子式为_______
有大侠知道吗?急
在常温下,10mL某气态烷烃A和80mL氧气(过量)混合,点燃使其充分燃烧.恢复到原状况时,残留气体为70mL.1,若A为烷烃,则其分子式为_______2,若A为烯烃,则其分子式为_______3,若A为炔烃,则其分子式为__
烃类燃烧方程的通式为:CxHy+(x+y/4)O2=点燃=xCO2+(y/2)H2O
∴△V=1+(x+y/4)-x=y/4+1
∴△V/V烃=(y/4+1):1=y/4+1=(10+80-70)/10=2
∴y=4
1,若A为烷烃,则其分子式为CH4
2,若A为烯烃,则其分子式为C2H4
3,若A为炔烃,则其分子式为C3H4
先写烃燃烧通式:
CxHy+(x+y/4)O2-->xCO2+y/2H2O(l) △v
1 1+y/4
10ml (10+80-70)ml...
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先写烃燃烧通式:
CxHy+(x+y/4)O2-->xCO2+y/2H2O(l) △v
1 1+y/4
10ml (10+80-70)ml
可得y=4
1,烷烃为:CH4
2,若A为烯烃,则其分子式为_C2H4______
3,若A为炔烃,则其分子式为__C3H4_____
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