How Accurate Are My Chemistry Calculations?

[BittersweetLove]

Am I doing these right??

1)How many moles of Li3N will be produced if you begin with 8.5 moles of Li ?

**Do I just find the moles for 3N and add them to the 8.5 moles of Li?**


2)Calculate the number of atoms in 20.5 g Carbon

**I guess I would Multiply Carbon's atoms by 20.5?**


3)What are the three basic types of compounds that are used as antacids?

**I have no idea whatsoever! I've looked everywhere for the answer. Please help!**

 

[mit]

1) write first the equation
2) 12 gr C contains 6.027*10^23 atoms how mutch is this for 20.5 g?
3) antacids is this formic acid?

 

[ace123]

Like mit already said first write the equation, balance it, then determine the limiting reactant.