here are my following questions
1) 2Ca+O2 (oxygen) ==> 2 Cao
work out the mass of product made with 60 grams of calcium
could you include the ratio too and explain? thanks :)
1) 2Ca+O2 (oxygen) ==> 2 Cao
work out the mass of product made with 60 grams of calcium
could you include the ratio too and explain? thanks :)
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Yes here the ratio is significant. It says that if 2 mol of Ca is reacted with enough oxygen, then 2 moles of CaO will also be produced.
Hence the ratio of Ca to CaO is 1:1.
Hear weight of Ca taken = 60g
No. of moles of Ca taken = 60/40 (i.e. n = Given mass/ atomic mass)
No of moles of CaO produced = No. of moles of Ca taken (as the ratio is 1:1) = 60/40
Mass of CaO produced = mass of 60/40 mol of CaO = (60 / 40) × 56 = 3 × 28 = 84 g.
Hence 84 g of CaO will be produced on reacting 60 g of Ca.
The value cannot be calculated if the ratio was unknown!
Hence the ratio of Ca to CaO is 1:1.
Hear weight of Ca taken = 60g
No. of moles of Ca taken = 60/40 (i.e. n = Given mass/ atomic mass)
No of moles of CaO produced = No. of moles of Ca taken (as the ratio is 1:1) = 60/40
Mass of CaO produced = mass of 60/40 mol of CaO = (60 / 40) × 56 = 3 × 28 = 84 g.
Hence 84 g of CaO will be produced on reacting 60 g of Ca.
The value cannot be calculated if the ratio was unknown!