To calculate the percent by mass of each component, we need to first calculate the total mass of the solution, which is the sum of the masses of ethanol, thiophene, and 2-ethyltoluene.
Total mass = 73.3 g + 62.4 g + 45.3 g
Total mass = 181 g
Now we can calculate the percent by mass of each component:
Percent ethanol = (mass of ethanol / total mass) x 100
Percent ethanol = (73.3 g / 181 g) x 100
Percent ethanol = 40.55%
Percent thiophene = (mass of thiophene / total mass) x 100
Percent thiophene = (62.4 g / 181 g) x 100
Percent thiophene = 34.53%
Percent 2-ethyltoluene = (mass of 2-ethyltoluene / total mass) x 100
Percent 2-ethyltoluene = (45.3 g / 181 g) x 100
Percent 2-ethyltoluene = 25.00%
Therefore, the percent by mass of ethanol in the solution is 40.55%, the percent by mass of thiophene is 34.53%, and the percent by mass of 2-ethyltoluene is 25.00%.
A chemist mixes 73.3 g of ethanol with 62.4 g of thiophene and 45.3 g of 2-ethyltoluene.
Calculate the percent by mass of each component of this solution.
Be sure each of your answer entries has the correct number of significant digits.
Ethanol?
Thiophene?
2-ethyltoluene?
1 answer