Question

which of the following also refer to the mass percentage of a component? (pick all that apply) percent weight percent mass %mass (w/w)% %weight question 4 1 pts how many grams of acetic acid are present in 100.0 grams of vinegar given the mass percent of acetic acid is 5.45%? the answer cannot be determined 54.5 g 0.545 5.45 g

Explanation:

Question 1

Mass - percentage of a component has several equivalent terms in chemistry. Percent weight, percent mass, %mass, (w/w)% are all used to denote the mass - percentage. %weight is also a common way to refer to it.

Step1: Recall mass - percent formula

Mass percent = $\frac{\text{mass of solute}}{\text{mass of solution}}\times100\%$. We can re - arrange it to find the mass of solute. Let the mass of acetic acid be $m$. Given mass percent = 5.45% and mass of solution (vinegar) = 100.0 g. So, $5.45=\frac{m}{100.0}\times100$.

Step2: Solve for $m$

$m=\frac{5.45\times100.0}{100}=5.45$ g.

Answer:

percent weight, percent mass, %mass, (w/w)%, %weight

Question 2