Chemistry chemical calculations

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Michelle72
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#1
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7. Magnesium carbonate, MgCO3, decomposes when heated in a similar reaction to calcium carbonate.
(-did other questions)
d) Magnesium carbonate also reacts with dilute hyrochloric acid:
MgCO3 + 2HCl ------ MgCl2 + H2O +CO2
(s) (aq) (aq) (l) (g)

i) 8.4g of magnesium carbonate was added to 25cmcubed dilute hydrochloric acid with a concentration of 0.20mol/dmcubed. Show which reactant is the limiting reactant.
ii) What volume of carbon dioxide gas was given off in the reaction described in part i, at room temperature?

(Please explain and it is quite urgent)
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an_atheist
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#2
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(Original post by Michelle72)
7. Magnesium carbonate, MgCO3, decomposes when heated in a similar reaction to calcium carbonate.
(-did other questions)
d) Magnesium carbonate also reacts with dilute hyrochloric acid:
MgCO3 + 2HCl ------ MgCl2 + H2O +CO2
(s) (aq) (aq) (l) (g)

i) 8.4g of magnesium carbonate was added to 25cmcubed dilute hydrochloric acid with a concentration of 0.20mol/dmcubed. Show which reactant is the limiting reactant.
ii) What volume of carbon dioxide gas was given off in the reaction described in part i, at room temperature?

(Please explain and it is quite urgent)
For part i you need to find the number of moles of each reactant that are present. And then using the equation, find which one will become 0 first.
For part ii, find the number of moles CO2 created by the reaction and multiply that by 24dm3
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Michelle72
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#3
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Thankyou, very simple and clear explanation
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