# chemistry

posted by .

Determine the percentage composition of each of the following compounds
a) NaCl
b) AgNO3
c) Mg(OH)2

for NaCl i got na=23/135=0.17 x 100= 17% Cl=35/135=0.26 x 100=26%

for AgNO3 i got 108/42 which im sure was wrong and i didn't get how to complete the problem..
for Mg(OH)2 i didn't have a clue

• chemistry -

In a), where did the 135 come from?
In b), where did the 42 come from?

## Similar Questions

1. ### chemistry

We are doing a lab that requires finding the molarity of an unknown AgNO3 solution after reacting NaCl + AgNO3 --> NaNO3 and AgCl and collecting/massing the precipitate. We will be using 10.00 mL of an NaCl solution and 10.00 mL …
2. ### chemistry

Determine the percentage composition of each of the following compounds a) NaCl b) AgNO3 c) Mg(OH)2
3. ### Chemistry 101

I had a snag from a question I asked yesterday, here is the thread. (My snag being the final post) I am trying to find the theoretical yield for this lab I am working on. The steps to finidng it would be great. In my lab I took 40mls …
4. ### chem

AgNO3 + NaCl produces AgCl + NaNo3 how much AgCl is produced when 3.10g of AgNO3 and .600g of NaCl react?
5. ### Chemistry

Silver nitrate (AgNO3) reacts with sodium chloride as indicated by the equation AgNO3 + NaCl ! AgCl + NaNO3 . Howmany grams of NaCl would be required to react with 518 mL of 0.543 M AgNO3 solution?
6. ### Chemistry

How many milliliters of 0.277 M AgNO3 solution are needed to react completely with 47.1 mL of 0.278 M NaCl solution?
7. ### chemistry

Silver nitrate (AgNO3) reacts with sodium chloride as indicated by the equation AgNO3 + NaCl ! AgCl + NaNO3 . How many grams of NaCl would be re- quired to react with 511 mL of 0.38 M AgNO3 solution?
8. ### Chemistry

AgNO3 + NaCl → AgCl + NaNO3 . How many grams of NaCl would be required to react with 446 mL of 0.211 M AgNO3 solution?
9. ### Chemistry

Consider the following reaction AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq) DH = -66 kJ Suppose that 100.0 mL of 0.100M AgNO3 is added to 200.0 mL of 0.100 M NaCl in a coffee cup calorimeter. Assuming that the initial temperature …
10. ### Chemistry - Gravimetry

If 0.8000 g of a mineral yields 0.2400 g of NaCl + KCl, and this mixture contains 58.00% of Cl, what is the percentage of Na2O and K2O in the mineral?

More Similar Questions