Considering the following equation, what is the number of moles of oxygen gas needed to react with 4.00 mol of mg is

2mg + o2 --> 2mgo

2.0 mol

1.0 mol

6.0 mol

3.0 mol

2moles

Explanation: 2Mg + O2 --> 2MgO

From the equation, 2 moles of Mg required 1mole of O2.

4 moles of Mg will require Xmole of O2. i.e

Xmol of O2 = 4/2 = 2moles

Therefore, 4moles of Mg requires 2moles of O2

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

bcde is the incorrect answer it is a