Homework Help: chemistry

Posted by Tom on Thursday, April 22, 2010 at 9:29pm.

A 0.821 sample of a substance composed of diatomic molecules has a mass of 131.3g. Identify this molecule.

May I have your expert help with this question? Thank you.

chemistry - bobpursley, Thursday, April 22, 2010 at 9:53pm
.821 what?
chemistry - Tom, Thursday, April 22, 2010 at 10:45pm
I'm sorry...it's a 0.821-mol sample of a substance.....

Thank you
chemistry - Kim, Friday, April 23, 2010 at 6:11am
Please help me with this question.

Give the formula for calcium phosphate and then answer the following questions:

(a)Calculate the percent composition of each of the elements in this compound.
(b)If you knew that there was 50.0g of phosphorus in your sample,how many grams of calcium phosphate would you have? How many moles of calcium phosphate would this be? How many formula units of calcium phosphate?

Answer this Question

Related Questions

physical science - calculate the molar mass ofthe substance. divide it by ...
science-chemistry - For diatomic molecule, must the 2 atoms be of the same ...
Chemistry - Sometimes, instead of percentages compostion, you will have the ...
chemistry - The chemical substance in natural gas is a compound called methane. ...
chemistry - Why are all diatomic molecules diatomic molecules linear, regardless...
AP BIO - 2. Suppose the DNA molecule were composed of six monomers. In addition...
Chemistry (Check) - Fill In the Blank Compounds that are formed when two or more...
Chemistry - im learning the general concepts of how atoms react etc... and i was...
Chemistry - "A sample of a nonpolar molecules capable of only dispersion ...
Chemistry - In a chemical reaction, exactly 2 mol of substance A react to ...

For Further Reading

First Name:
School Subject:
Answer: