Sunday

April 20, 2014

April 20, 2014

Posted by **Anonymous** on Wednesday, March 31, 2010 at 11:41pm.

a)Determine the number of grams in 0.750 moles of the compound Iron(II)phosphate: Fe3(PO4)2.

Answer: ?

b)How many atoms of iron are in 0.750 moles of the compound

Iron(III)oxide?

Answer: ?

- Chemistry -
**DrBob222**, Wednesday, March 31, 2010 at 11:50pmAnd it will never be your thing if we give you the answers.

a. g = moles x molar mass Remember this one formula and you can rearrange it to give you three things, depending upon the question.

a. grams = moles x molar mass

b. moles = grams/molar mass

c. molar mass = grams/moles.

There is no chemistry involved. This is just a little algebra.

b. There are 6.022 x 10^23 molecules in a mole of anything so 0.75 x 6.022 x 10^23 = the number of molecules of iron(III) oxide. The formula for iron(III) oxide is Fe2O3. You know how many molecules are there and there are _______ atoms in 1 molecule of Fe2O3 so there are _____ in 0.75 mole Fe2O3.

**Related Questions**

Chemistry - Can you please someone check my answer for me? I don't know how to ...

Algebra - Would someone please check these answers? Simplify. 3/x-5+1/1-4/x-5 ...

math help - Consider the following. (Give your answers correct to four decimal ...

Math please help thnks - A silver dollar is dropped from the top of a building ...

Chemistry - Can you please someone check my answer for me? a)Determine the ...

Physics =Please check - You're on planet YZ and an astronaut observes that a 1.0...

Algebra Please Check answers - Directions: Determine whether each trinomial is a...

Asap can someone pplz check these answers - Please check my answers I have 2 do ...

Math ; please please help. - 1. Explain in detail how to determine the value of ...

Chemistry PLEASE HELP:( - I really need someone to explain this stoichiometry ...