Calculate the concentration of sodium (gramsLgramsL) in sea water if a 1.80 liter sample of water contains 2.07 grams of sodium.

Question

i need help. i think the answer is 1.15 but that is not right. 2.07/1.80= 1.15

Answer 1

If you want the concentration in grams per liter (g/L), then simple divide the number of grams by the number of liters.

Number of grams =2.07

Number of liters = 1.80

Concentration in grams/L = 2.07/1.80 = 1.15 g/L  

So, you would be correct.

Not sure what you mean by gramsLgramsL.  There is no such thing in chemistry.

 

Exactly what are you trying to calculate?  Moles/liter?  If so, then it is...

2.07 g NaCl x 1 mole NaCl/58.44 g = 0.0354 moles NaCl

0.0354 moles/1.80 liters = 0.0197 moles/L