Posted by **Mary** on Tuesday, June 25, 2013 at 9:17pm.

What quantity of heat is required to produce 5 mol of oxygen gas by this reaction? HgO(s) → Hg(l) + ½ O2(g), ΔH = +90.7kJ

I calculated 90.7*5, but my online homework says its wrong how do I calcuate this?

- Chemistry answer check -
**Devron**, Tuesday, June 25, 2013 at 9:36pm
907.5 kJ

- Chemistry answer check -
**Devron**, Tuesday, June 25, 2013 at 10:39pm
What do you have to multiply ½ O2 by to get 5 moles of O2?

1/2x=5

Solving for x

x=10, so you have to multiply O2 and everything else by 10 to get the following:

10HgO(s) → 10Hg(l) +5O2(g), ΔH = +907kJ not 907.5 kj. I apologize, a typo in my original response.

- Chemistry answer check -
**cam**, Wednesday, March 23, 2016 at 8:25pm
907

## Answer This Question

## Related Questions

- chemistry - How many grams of oxygen gas are required to produce 7.46 kJ of ...
- chemistry - How many grams of oxygen gas are required to produce 7.46 kJ of ...
- Chemistry - Can you check my calculations, please? It's for a lab we did in ...
- Chemistry - Given the following hypothetical equations, 2A + B → 3C + 2D...
- chemistry - Mercury reacts with oxygen to produce mercury(II) oxide. Hg(l) + O2(...
- Can someone please check my answer for chemistry - Compelete the following ...
- Chem - Calculate the work (in kJ) when 1.80 moles of methane react with excess ...
- chemistry - I can't figure this question out for the life of me. If anyone could...
- chemistry - Nitroglycerin is a powerful explosive, giving four different gases ...
- Chemistry problem check - Compelete the following table for an ideal gas. P= 7....

More Related Questions