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Question
8.2 grams of calcium nitrate is decomposed by heating according to the equation
\[\ce{2Ca(NO3)2 -> 2CaO + 4NO2 + O2}\]
Calculate the following:
Mass of CaO formed
[Atomic weights: Ca - 40 , N - 14, 0 - 16]
Numerical
Solution
328 g of calcium nitrate produces
2 × 56 g of CaO
8.2 g of calcium nitrate produces
`2 × 56 × 8.2/328`
= 2.8 g of CaO
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Laboratory Preparation of Nitrogen Dioxide
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Give a chemical test to distinguish between the following gases:
Chlorine and nitrogen dioxide
8.2 grams of calcium nitrate is decomposed by heating according to the equation
\[\ce{2Ca(NO3)2 -> 2CaO + 4NO2 + O2}\]
Calculate the following:
Volume of nitrogen dioxide obtained at STP
[Atomic weights: Ca − 40, N − 14, 0 − 16]
