D: 12g
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What is the concentration of a solution containing 1.0g of sodium hydroxide in 250 cm³ of solution?
An element, E, forms a hydride, EH₄, which contains 90.0% by mass of E. If the relative atomic mass of hydrogen is 1,…
A piece of chalk has a mass of 23.0g. Chalk is impure calcium carbonate. When analysed, the chalk is found to contain…
The diagram shows the electrolysis of molten lead(II) bromide using inert electrodes. What happens during this electr…
Which pair of metals X and Y will produce the highest voltage when used as electrodes in a simple cell?
The energy profile diagram for the reaction between hydrogen and chlorine is shown. What information about this react…