Friday
March 27, 2015

Homework Help: Chemistry

Posted by Anonymous on Sunday, October 15, 2006 at 9:08pm.

When hydrogen selenide gas reacts with oxygen, selenium dioxide and steam are produced.

How many liters of selenium dioxide would be produced from 5.50 L of oxygen? Assume 90% yield and that all gases are measured at the same temperature and pressure.


Balance the equation:
2H2Se + 3O2 > 2SeO2 + 2H2O (g)
For every three volumes of oxygen, on gets two volumes of SeO2. Here, .90 yield.

Volume SeO2= .90*2/3 * 5.5

check my thinking.


I am a little disturbed that we are calculating SeO2 as a gas. If SiO2 is a solid, the would we not expect SeO2 to be a solid? My Merck Index lists it as a solid. At any rate, the other post is correct but here is how you do it in mols.
2H2Se + 3O2 ==> 2SeO2 + 2H2O(g)
mols oxygen = 5.5L/22.4 = 0.2455.
mols SeO2 produced = 0.2455 mols O2 x (2 mols SeO2/2 mols O2) = 0.164 mols SeO2.
vol SeO2 = 0.164 mol x 22.4 L/mol =3.67 L.
The yield is only 90%; therefore, we would obtain 3.67 x 0.9 = 3.3 L

I hope this helps.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - What is the valency of selenium in hydrogen selenide? Consider what ...
Chemistry - 1. Hydrogen gas combines with oxygen gas to yield water. if 15 g O2 ...
Chemistry - Just having some trouble with this chemistry problem.. Thanks for ...
chemistry - 1. Chlorobenzene, C6H5Cl, is used in the production of chemicals ...
chemistry - Write word equations for the following chemical reactions. a. Pure ...
Chemistry - Propane gas (C3H8) burns completely in the presence of oxygen gas (...
Chemistry - Propane gas (C3H8) burns completely in the presence of oxygen gas (...
Chemistry Balancing Equations - I really need help with balancing these ...
chem - Liquid carbon disulfide reacts with 415 mL of oxygen to produce the...
Chemistry - Toxic Carbon monoxide gas is produced when fossil fuels such as ...

Members