ACTIVITY #101.Step 1 – GIVEN Solute = 22.5 g zincSolvent = 427.5 g copperStep 2 – FIND Percent by mass (% m/m)Step 3 – FORMULA % m/m = (mass of solute)/(mass of solution) x 100%Step 4 – SOLUTION/COMPUTATION % m/m = (mass of solute)/(mass of solution) x 100% = (22.5 g)/(22.5+427.5g) x 100% = (22.5 g)/(450 g) x 100% = 0.05 X 100%Step 5 – FINAL ANSWER % m/m = 5%2. Step 1 – GIVEN Solute = 1.5g nickelSolvent = 4.5 g copperStep 2 – FIND Percent by mass (% m/m)3. Step 1 – GIVEN Solute = 11.0 g goldSolvent = 554.0 g silverStep 2 – FIND Percent by mass (% m/m)4.Step 1 – GIVEN Solute = 30 mL ethyl alcoholSolution = 100 mLStep 2 – FIND Percent by volume (% v/v)5.Step 1 – GIVEN Solute = 15 mL benzeneSolvent = 70 mL tolueneStep 2 – FIND Percent by volume (% v/v)​

Alright, let’s solve them step-by-step just like your example in #1.________________________________2.Step 1 – GIVENSolute = 1.5 g nickelSolvent = 4.5 g copperStep 2 – FINDPercent by mass (% m/m)Step 3 – FORMULA\%m/m = \frac{\text{mass of solute}}{\text{mass of solution}} \times 100\%Step 4 – COMPUTATIONMass of solution = 1.5 g + 4.5 g = 6.0 g\%m/m = \frac{1.5}{6.0} \times 100\% = 0.25 \times 100\% = 25\%Step 5 – FINAL ANSWER\%m/m = 25\%---3.Step 1 – GIVENSolute = 11.0 g goldSolvent = 554.0 g silverStep 2 – FINDPercent by mass (% m/m)Step 3 – FORMULA\%m/m = \frac{\text{mass of solute}}{\text{mass of solution}} \times 100\%Step 4 – COMPUTATIONMass of solution = 11.0 g + 554.0 g = 565.0 g\%m/m = \frac{11.0}{565.0} \times 100\%11.0 \div 565.0 = 0.019469...0.019469 \times 100 = 1.9469\% \approx 1.95\%Step 5 – FINAL ANSWER\%m/m \approx 1.95\%---4.Step 1 – GIVENSolute = 30 mL ethyl alcoholSolution = 100 mLStep 2 – FINDPercent by volume (% v/v)Step 3 – FORMULA\%v/v = \frac{\text{volume of solute}}{\text{volume of solution}} \times 100\%Step 4 – COMPUTATION\%v/v = \frac{30}{100} \times 100\% = 0.3 \times 100\% = 30\%Step 5 – FINAL ANSWER\%v/v = 30\%---5.Step 1 – GIVENSolute = 15 mL benzeneSolvent = 70 mL tolueneStep 2 – FINDPercent by volume (% v/v)Step 3 – FORMULA\%v/v = \frac{\text{volume of solute}}{\text{volume of solution}} \times 100\%Step 4 – COMPUTATIONVolume of solution = 15 mL + 70 mL = 85 mL\%v/v = \frac{15}{85} \times 100\%15 \div 85 = 0.17647...0.17647 \times 100 = 17.647\% \approx 17.65\%Step 5 – FINAL ANSWER\%v/v \approx 17.65\%________________________________hope i could help and thanks

Answered by emperadorjacinth | 2025-08-10