Intermediate
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Question 1 of 51. Question
What is the emprical formula of an organic compound containing 40% carbon and 6.67% hydrogen by mass ?(C=12, H=1, O=16)
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Question 2 of 52. Question
An element E, forms the following compounds with bromine: EBr2, EBr3, and EBr4 this observation illustrate the…………………….
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Question 3 of 53. Question
What mass of s02 contains the same number of molecules as 0.8g of CH4? (SO2=64g mol-1, CH4=16g mol-1)
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Question 4 of 54. Question
The volume of 0.25 moldm-3 solution of KOH that would yeild 6.5g of solid KOH on evaporation is (K = 39.0; O = 16.0; H = 1.00)……………
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Question 5 of 55. Question
The molar ratio of hydrogen to carbon in an organic liquid compound produced 64cm3 of vapour. What is the molecular formula of the liquid compound? (C=12, H=1, molar volume of a gas at s.t.p=22.4dm3
