Wednesday

August 20, 2014

August 20, 2014

Posted by **Alex** on Thursday, September 15, 2011 at 5:14pm.

- Chemistry -
**DrBob222**, Thursday, September 15, 2011 at 5:25pmN2 + 2O2 ==> 2NO2

No.

You can think of this several ways.

1. The equation tells us 2 moles NO2 are given by 1 mole N2. We must divide 2moles NO2 by 2 to obtain 1; therefore, we must divide 1 mole N2 by 2 to obtain 1/2 mole. 1/2 mole N2 is the answer.

2. Use dimensional analysis using the coefficients in the balanced equation.

1 mole NO2 is what you want; therefore,

1 mole NO2 x (1 mole N2/2 moles NO2) = 1 mole x 1/2 = 1/2 mole N2. Note how moles NO2 in the numerator cancel with moles NO2 in the denominator leaving ONLY moles N2 for the units which is what you want.

3. Use ratio and proportion.

(1 mole N2/2 moles NO2) = (x moles N2/1 mole NO2)

Solve for x = 1/2 mole N2.

**Related Questions**

chemistry - hi, I have redone this question. Is this right. How many grams of ...

Chemistry - 92.01 grams of N2O4 (g) is placed in a container and allowed to ...

General Chem - Nitrogen oxide reacts with oxygen gas to form nitrogen dioxide (...

chemistry - How many grams of NO2 will be produced when 5.00 moles of NO react? ...

Chemistry - The gram-formula mass of NO2 is defined as the mass of one mole of a...

Chemistry - Having some confusion with this question....I have the answers, just...

chemistry - Anthroquinone (C14H8O2), an important intermediate in the dye ...

Chemistry - I am completing my lab and cannot figure this out. I need someone to...

chemistry - if you have one mole of CH3CH3(g) + 2 moles of Cl2 (g) and form one ...

Chemistry - Chemistry equilibrium? Consider the reaction 2NO(g) + O2(g) = 2NO2(g...