Question

I TU liter of solution. Bnel 2. What is the uncertainty in a 100 mL buret? 3. The density of a solution is 1.41 g/mL. If we have 27.5 grams of this solution calculate its volume. Show all work. D = 2 2 2 = 1,4181 mL Come to Pont o v od20.8 v = 19.5 ml vode n aravnom 4. If 13 out of every 180 students wear glasses, calculate the percent of students who wear glasses. Show all work. 5. Calculate the percent uncertainty in measuring out 8.50 mL with a 10 ml pipet. Show all work.

Answer 1

QUESTION 4:

Given that, No.of students wearing glasses, $n=13$

Total no.of students, $N=180$

Therefore percentage of students wearing glasses is given by,

$Percentage=\frac{n}{N}\times 100\%=\frac{13}{180}\times 100\%$

$\Rightarrow Percentage=0.0722\times 100\%$

$\mathbf{\Rightarrow Percentage=7.22\%}$