Question

13. _____ The mass of 3.75 mol of KF(s) is

a. 3.75 g
b. 58.1 g
c. 217.8 g
d. 108.9 g

Answer 1

The mass of 3.75 mol of KF(s) is approximately c. 217.8 g.

Step-by-step explanation:

The mass of 3.75 mol of KF(s) can be calculated by multiplying the molar mass of KF by the number of moles.

The molar mass of KF is the sum of the atomic masses of K and F, which can be found on the periodic table.

The atomic mass of K is 39.10 g/mol and the atomic mass of F is 18.998 g/mol.

Adding these values together, the molar mass of KF is 58.108 g/mol.

Multiplying this molar mass by 3.75 mol gives a mass of approximately 217.8 g of KF(s), so the correct answer is c. 217.8 g.

Answer 2

C. 217.8 g

Step-by-step explanation:

First, we find the weight of KF. notice they are 1:1 ratio. so the molar mass of K is 39.0983 and Fluorine is 18.998403

we add them together we get 58.09 g/mol

now to find the mass we do

`(58.096 Grams)/(mol)` * 3.175 mol

mol and mol cancel out, we left with 58.096 grams * 3.75

if you multiply you get 217.86 grams.