Question

find the mass of 10 moles of methanol (ch3oh). given atomic masses of c=12u,h=1u,o=16u

Answer 1

Mass = molar mass *moles

m =M*n

=(12+3*1+16+1)*10

= 32u*10

= 320 g

Answer 2

Given:

The moles of methanol = 10.

Atomic masses of carbon, hydrogen, oxygen = 12u, 1u, 16u respectively.

To find:

The mass of 10 moles of CH3OH.

Solution:

The molecular mass of methanol (CH3OH) is,

CH3OH = 12 + 3 x 1 + 16 + 1

= 32 grams.

Therefore, the molecular mass of methanol is 32 grams.

As we know, the molecular mass of a substance is equal to one mole of a substance.

Hence, 1 mole of methanol = 32 grams

Therefore 10 moles of methanol is equal to 32 x 10 = 320 grams.

Hence, the mass of 10 moles of methanol is 320 grams.