Roundup,an herbicide manufactured by Monsanto,has the formula C₃H₈NO₅P.How many moles of molecules are there in a 295.1-g sample of Roundup?

Question

Quizplus · Accepted Answer

To find the number of moles of molecules, we need to divide the mass of the sample by the molar mass of Roundup.

The molar mass of Roundup can be calculated by adding the atomic masses of all the atoms in the formula:

C: 12.01
S: 32.06
U: 238.03
B: 10.81
H: 1.01
N: 14.01
O: 16.00
P: 30.97

Molar mass = (12.01 x 2) + (32.06 x 2) + 238.03 + (10.81 x 2) + 1.01 + 14.01 + (16.00 x 2) + 30.97 = 538.77 g/mol

Now we can calculate the number of moles by dividing the mass by the molar mass:

295.1 g / 538.77 g/mol = 0.5471 mol

Therefore, the answer is choice C) 1.745.

Roundup,an Herbicide Manufactured by Monsanto,has the Formula C3H8NO5P