Question

How many gram-moles of formic acid, CH2O2, are in 225 g of the compound? Numbe g-mol CH,0, How many pound-moles of formic acid are in 225 g of the compound? Number Ib-moles CH,O,

Answer 1

Step-by-step explanation:

(a) Mass given = 225 g

Molecular mass of
`CH_(2)O_(2)` =
`12 + 2 + 16 * 2` = 12 + 2 + 32 = 46 g/mol

As, it is known that number of moles is equal to the mass divided by molar mass.

Mathematically, No. of moles =
`\frac{mass}{\text{molecular mass}}`

Hence, calculate the number of moles of formic acid as follows.

No. of moles =
`(225 g)/(46 g/mol)`

= 4.89 mol or g mol

Hence, in 225 g of the compound there are 4.89 mol or g mol.

(b) It is known that 1 g = 0.0022 pound

So, pounds present in 4.89 g will be calculated as follows.

4.89 \times 0.0022 pound

= 0.0107 pound mole

Hence, in 225 g of the compound there are 0.0107 pound mole.