Answer to Question #152244 in Organic Chemistry for Shelly Misener

Question

Explorian has a molar mass of 81.40g/mole. If 100grams of EX 2(subscript) O is found how many moles will this be ? How do you set this up to solve using conversions ?

Answer 1

Number of moles for the obtained product (EX₂O) can be calculated by using the following set up formula.

Number of moles = Mass of the substance EX₂O (obtained)/ Mass of one mole substance EX₂O (calculated)

Now an emperical formula has been set up for conversion of Explorian to EX₂O.

2 Explorian + 1/2 O₂ = EX₂O

Now 1 mole of EX₂O = (2 x molar mass of Explorian ) + molar mass of oxygen atom

= (2x 81.40) + 16

= 178.80 g

The obtained amount of EX₂O = 100 g

So number of moles = 100/178.80

= 0.56