Answer:
1. 22.5ml
2. 12 ml
3. 21.2%
4.20g
5.8.0%
6.15 %
Solution:
1. contains solution = 90 ml
methanol = 25 ml
= (90/100× 25) ml
=90/4 ml
= 22.5 ml
2. A bottle of hydrogen peroxide also known as agua oxigenada is labeled 3% (v/v) in a 400mL bottle
3/100×400 ml
=12ml
3.mass solution = mass salt + mass water
mass solution = 5.3 g + 19.7 g
mass solution = 25 g
mass solute/mass solution×100%
5.3g/25g×100%
%mass=21.2
4.x g/ 400 = 0.05 g/mL
x g = (400mL)(0.05 g/mL)
x g = (400mL)(5g / 100mL)
x = 20g
5. percent by mass = (mass solute / mass solution) × 100
percent by mass = (8.0 g / 100 g) × 100
percent by mass = 8.0%
6.The formula for percent by mass is given by:
Mass of solution = 200 g
Mass of solute = 30 g
percent by mass = 15%
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Answers & Comments
Answer:
1. 22.5ml
2. 12 ml
3. 21.2%
4.20g
5.8.0%
6.15 %
Solution:
1. contains solution = 90 ml
methanol = 25 ml
= (90/100× 25) ml
=90/4 ml
= 22.5 ml
2. A bottle of hydrogen peroxide also known as agua oxigenada is labeled 3% (v/v) in a 400mL bottle
3/100×400 ml
=12ml
3.mass solution = mass salt + mass water
mass solution = 5.3 g + 19.7 g
mass solution = 25 g
mass solute/mass solution×100%
5.3g/25g×100%
%mass=21.2
4.x g/ 400 = 0.05 g/mL
x g = (400mL)(0.05 g/mL)
x g = (400mL)(5g / 100mL)
x = 20g
5. percent by mass = (mass solute / mass solution) × 100
percent by mass = (8.0 g / 100 g) × 100
percent by mass = 8.0%
6.The formula for percent by mass is given by:
Mass of solution = 200 g
Mass of solute = 30 g
percent by mass = 15%
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