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Chem gcse please help

Anyone know the answer? please help me out
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Reply 1
rough method could be:
weigh 6 boiling tubes
add 2g (mass needs to be the same in each tube) of a different metal carbonate to each one
heat over a Bunsen burner, stop after a few minutes, reweigh, then heat again, repeat this until there is no change in mass, workout the mass of CO2 released.
repeat investigate to get repeat results to improve accuracy and reliability

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