Question

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

• A. 0.48 g
• B. 0.80 g
• C. 0.42 g
• D. 0.28 g

Answer 1

Answer: (A)

0.48 g

Answer 2

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