# chem

posted by .

a mixture of NaBr & NaCl has a mass of 2g & found to contain 0.75g of Na. What is the mass of NaBr in the mixture?

• chem -

NaBr = molar mass NaBr
NaCl = molar mass NaCl
Na = atomic mass Na.
Let x = NaCl
y = NaBr
--------------------\
x + y = 2
x(Na/NaCl) + y(Na/NaBr) = 0.75
Solve the two equations simultaneously fo x and y.

## Similar Questions

1. ### chemistry

0.872g sample containing only NaBr and KBr gives 1.052g AgBr. what's the % of each salt?
2. ### Chem-Lab-HELP!!

Heating 1.124g of an unknown NaHCO3-NaCl mixture resulted ina mass loss of 0.270g. 1) Calculate the mass of NaHCO3 present in the original mixture. 2) Calculate the mass percent of NaHCO3 in the uknown mixture
3. ### chemistry

I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture.
4. ### CHEMISTRY

I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture. …
5. ### chemistry

a mixture of NaCl and NaBr has a mass of 2.06 g and is found to contain 0.75 g of na what is the mass of NaBr in the mixture ?
6. ### science

A mixture of {\rm NaCl} and {\rm NaBr} has a mass of 2.10{\rm g} and is found to contain 0.71{\rm g} of {\rm Na} What is the mass of {\rm NaBr} in the mixture?
7. ### chemistry

A mixture of NaCl and NaBr has a mass of 2.04g and is found to contain 0.70g of Na. What is the mass of NaBr in the mixture?
8. ### Chemistry

I am doing an elementary experiment regarding separating mixtures. My mixture contained NaCl, SiO2, and CaCO3. In the beginning, I calculated the mass of my mixture (all components together). As I completed the experiment, some of …
9. ### Gen Chem

A mixture of NaCl and sucrose (C12H22O11) of combined mass 10.2 g is dissolved in enough water to make up a 250 mL solution. The osmotic pressure of the solution is 8.29 atm at 23°C. Calculate the mass percent of NaCl in the mixture.
10. ### chemistry

Calculate the mole fraction of a mixture of NaBr and KBr which is 0.981g of mass, given that we are treating the mixture with excessive AgNO3. 1.690g of AgBr is formed.

More Similar Questions