ChemistryChemical combinationWAEC
Elements combine in a fixed ratio by mass to form a particular compound. This is the law of
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.
Chemistry · Chemical combination
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More Chemical combination questions
- Calculate the percentage by mass of nitrogen in ammonium trioxonitrate(V), NH₄NO₃. [N = 14, H = 1, O = 16]
- What mass of oxygen combines with 4 g of hydrogen to form water? (H = 1, O = 16)
- What volume does 0.25 mol of carbon(IV) oxide occupy at s.t.p.? [molar volume = 22.4 dm³]
- Find the percentage by mass of nitrogen in NH₄NO₃. (N = 14, H = 1, O = 16)
- In the reaction 2KClO₃ → 2KCl + 3O₂, how many moles of oxygen are produced from 2 mol of KClO₃?