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A-level Chemistry Year 1
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Elements in group 13 form ions with which charge?
The formula of the nitride ion is?
In the chemical equation shown below the stoichiometric numbers (balancing numbers) have been replaced with letters. What is the value of each letter if the lowest whole number ratio is used to balance the equation?
(In practice, where the balancing number =1, this would be implied rather than shown. For this activity if the balancing number is 1, input 1)
wNaBr + xCaF2 → yNaF + zCaBr2
The number of moles of solute (n / mol) in a fixed volume (V / dm3) of solution can be calculated by using the solution concentration (c / mol dm-3) and the equation
n = cV
When rearranged to make V the subject, the equation becomes
The number of moles (n / mol) in a fixed volume (V / dm3) of gas can be calculated using the molar gas volume (24 dm3 mol-1) and the equation
n = V / 24
When rearranged to make V the subject, the equation becomes