If we rearrange your first equation to
3.914 g NaCl x (1 mol NaCl/58.44 g) = ? mol NaCl. Note g unit cancels and you are left with moles.
You have 4 s.f. in 3.914 and 4 s.f. in 58.44; you are allowed 4 s.f. in the answer.
I am trying to find th e# of moles of NaCl but I am not sure of the units.
3.914g NaCl / mm=58.44 so is it
3.914g/mol divided by 58.44g/mol = 0.0669moles.
I am not sure how many significant figues to use.
3 answers
for my answer I get 0.0669. Should I leave it like this or do 6.69e-2?
I wouldn't do either.
3.914/58.44 = 0.06697. Why did you throw the 7 away? You're allowed 4 s.f. You kept only 3. (Besides that you didn't round the 7. To 3 s.f. you should have written 0.0670.)
3.914/58.44 = 0.06697. Why did you throw the 7 away? You're allowed 4 s.f. You kept only 3. (Besides that you didn't round the 7. To 3 s.f. you should have written 0.0670.)
1 answer