Answer:
Step-by-step explanation:
Mass percentage composition of copper and silver in the mixture will be calculated differently, sum of which must be equal to 100 to show the calculation is right.
To determine the percentage, one must first add the sum of the two masses together 26 + 79 = 105 g
If the mass of copper is 26 g, % by mass of copper = 26/105 × 100
mass percent of copper = 24.76%
If the mass of silver is 79 g, % by mass of silver = 79/105 × 100
mass percent of silver = 75.24%
NOTE: To show the calculation is right 24.76 + 75.24 = 100