Homework Help: Chemistry

Posted by Danny on Wednesday, May 5, 2010 at 8:52pm.

Magnesium reacts with oxygen to form magnesium oxide according to the following equation:

2Mg(s) + O2(g) ==> 2MGO(s)

If 0.81 grams of magnesium oxide are formed, how many grams of oxygen reacted?

Chemistry - DrBob222, Wednesday, May 5, 2010 at 8:57pm
MGO and MgO are not the same.

1. You have the balanced equation.
2. Convert 0.81 grams MgO to moles. moles = grams/molar mass.
3. Using the coefficients in the balanced equation, convert moles MgO to moles O2.
4. Convert moles O2 to grams. g = mols x molar mass.

Answer this Question

Related Questions

chemistry - When magnesium is heated in air, it reacts with oxygen to form ...
Stiochiometry - Equation 2Mg+O2= 2MgO Lab data: Magnesium ribbon= .04 grams ...
Chemistry - Write the two chemical equations that describe the conversion of ...
chem - What is the actual amount of magnesium oxide produced when excess carbon ...
chemistry 101 - given the reaction: 2mg + o2-----> 2mgo . when 4.32g of ...
Emma Rae - 2Mg + O2--->2MgO If more oxygen is added, the amount of ...
chem - How many grams of magnesium oxide are formed when 13.5 L of oxygen gas, ...
chem-repost - How many grams of magnesium oxide are formed when 13.5 L of oxygen...
Chem - Please tell me if these are right. How many grams are needed to obtain 1....
chemistry - A 20.2g chunk of magnesium metal reacts with 13.7 g of oxygen gas to...

For Further Reading

First Name:
School Subject:
Answer: