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Magnesium and oxygen combine in the …

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Magnesium and oxygen combine in the ratio of 3:2 by mass to form magnesium oxide.What mass of oxygen gas would be required to react completely with 24g of magnesium?

Posted by Luv Misra 5 years, 7 months ago

CBSE > Class 09 > Science

2 answers

Parikshit Malviya 5 years, 7 months ago

Mg=24u O=16u In, MgO, Atomic mass of MgO=24*1+16*1=40u Let the ratio be 3x:2x According to question. 3x=24g 2x=16g

Gungun Ghosh 5 years, 7 months ago

We know that Mg and O combine in the ratio of 3:2 Mg:O = 3:2 Now 24g of Mg is given. Let the mass of O be X. 3:2 = X:24 Cross multiply both the sides. 3×X = 24×2 X = (24×2)÷3 = 48 ÷ 3 =16g Therefore 16g of O is required to completely mix with 24g of Mg.

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