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Kamille
Group Title
Hello, can someone help me?
I have a reaction:
2Mg+O2>2MgO
Also, I know that
mass of Mg is 9g
mass of O2 is 8g
What is the mass of MgO?
 one year ago
 one year ago
Kamille Group Title
Hello, can someone help me? I have a reaction: 2Mg+O2>2MgO Also, I know that mass of Mg is 9g mass of O2 is 8g What is the mass of MgO?
 one year ago
 one year ago

This Question is Closed

yrelhan4 Group TitleBest ResponseYou've already chosen the best response.2
find the moles f each mg and o2. check which is the limiting reagent. that many moles of mgo will be formed. also note x moles of mg will give x moles of mgo. but x moles of o2 will give 2x oles of mgo.
 one year ago

justine97 Group TitleBest ResponseYou've already chosen the best response.1
1. Find moles of Mg and O2 Mg → 9/24.3 = .37 mol Mg O2 → 8/16.0 = .50 mol O2 2. Find the limiting reactant (moles of each substance divided by coefficient) Mg → .37mol ÷ 2 mol = .19 O2 → .50 mol ÷ 1 mol = .5 Limiting reactant (smallest number) = Mg 3. Use moles of Mg to find how many moles of MgO formed \[\frac{ 2 mol Mg }{ 2 mol MgO } = \frac{ .5 mol O2 }{ x }\] x = .5 mol MgO formed 4. Convert moles of MgO to grams MgO → .5(24.3g) + .5(16.0g) = 20.15g Answer: 20.15 grams MgO
 one year ago
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