C: 64 g
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For which molecules are the empirical and molecular formulae the same? 1. methanoic acid, HCO2H 2. ethanoic acid, CH3…
A 10 cm³ sample of a gaseous hydrocarbon is completely burnt in oxygen. The total volume of the products is 70 cm³. A…
Which statement most clearly indicates that diamond and graphite are forms of carbon?
Pieces of material are placed in turn between P and Q in the incomplete electrical circuit shown. Which material woul…
Which of the following pairs of compounds react together to produce ammonia? 1. ammonium nitrate and calcium carbonat…
Which reaction occurring in the blast furnace is an acid base reaction?