14 A 5-g sample of impure magnesium carbonate is reacted with an excess of hydrochloric acid:
MgCO2 (s) + 2HCl (aq) →
MgCl, (aq) + H, O (1) + CO, (g)
1250 cm of carbon dioxide is collected at rtp.
a How many moles of CO2 are produced?
b What mass of pure magnesium carbonate would
give this volume of carbon dioxide?
(A.: C = 12, O = 16, Mg = 24.)
c Calculate the % purity of the 5-g sample.

Explain which atom l or m is more stable and why

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What are transitions between a liquid and gas called? identify which way they are transitioning