chemistry - numerical please tell me this question
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I think the mass of oxygen left unused after reaction is 240g
1Ayush786:
how?
thinking that formula for magnesium oxide Mgo so their mass should be in equal proportion
they asked only oxygen so that magnesium is 120
see once atomic masses magnesium atomic mass is 24 so that it is 5 times of it like that oxygen also 5 times that is equal to 80 so subtract it from 360
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thanks
your welcome
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