Question

In: Chemistry

How many grams are in a 0.10 mol sample of ethyl alcohol?

How many grams are in a 0.10 mol sample of ethyl alcohol?

Solutions

Expert Solution

Given Number of moles of ethyl alcohol sample , n = 0.10 mol

The formula for ethyl alcohol is C2H5OH.

Molar mass of C2H5OH is = ( 2xAt.mass of C ) + ( 5xAt.mass of H ) +( 1x At.mass of O ) + (1x At.mass of H)

                                      = ( 2x12 ) + ( 5x1) + (1x16)+(1x1)

                                     = 46 g/mol

We know that number of moles = mass/molar mass

So mass of C2H5OH is , m = number of moles x molar mass

                                        = 0.10 mol x 46 g/mol

                                        = 4.6 g

So the mass of C2H5OH is 4.6 g

queen_honey_blossom answered 1 hour ago
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