B: 36
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In an experiment, 1 cm³ of a gaseous hydrocarbon X required 4cm³ of oxygen for complete combustion to give 3 cm³ of c…
What is the concentration of a solution containing 1.0g of sodium hydroxide in 250 cm³ of solution?
A piece of chalk has a mass of 23.0g. Chalk is impure calcium carbonate. When analysed, the chalk is found to contain…
Ethylamine gas, C₂H₅NH₂, and hydrogen chloride gas, HCl, react together to form a white solid, ethylamine hydrochlori…
The scheme shows a sequence of reactions starting from compound Y. What could the compound Y be?
Which electronic configurations represent three metallic elements in the same period of the Periodic Table?