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  4. 0.42 g magnesium carbonate and 0.5 g calcium carbonate are; heated strongly. What is the quantity left?

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Q. $0.42 \,g$ magnesium carbonate and $0.5\, g$ calcium carbonate are; heated strongly. What is the quantity left?

BHUBHU 2009

Solution:

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Total weight $=$ w t.of $MgO + $ wt of $CaO$
$=0.005 \times 40+0.005 \times 56 $
$=0.48 \,g$