1. What is the % M/M if 8.0 g copper is added to enoughzinc to produce 100 g of an alloy?2. Brass is a copper-zinc alloy. If the concentration of zincis relatively low, the brass has a golden color and is oftenused for inexpensive jewellery. If a 35.0 g pendantcontains 1.7 g of zinc, what is the percentage mass bymass of zinc in brass?3. What is the % M/M of copper in an alloy when 10 kg ofCu is mixed with 250 kg of Zn?4. You have 200g of a solution that contains 30g ofhydrochloric acid (HCl), what percentage of your solutionis made up of hydrochloric acid (M/M)?5. If I make a solution by adding water to 75 mL of ethanoluntil the total volume of the solution is 375 mL, what'sthe percent by volume of ethanol in the solution?

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1. What is the % M/M if 8.0 g copper is added to enough zinc to produce 100 g of an alloy?

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 38CR

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

1. What is the % M/M if 8.0 g copper is added to enough
zinc to produce 100 g of an alloy?
2. Brass is a copper-zinc alloy. If the concentration of zinc
is relatively low, the brass has a golden color and is often
used for inexpensive jewellery. If a 35.0 g pendant
contains 1.7 g of zinc, what is the percentage mass by
mass of zinc in brass?
3. What is the % M/M of copper in an alloy when 10 kg of
Cu is mixed with 250 kg of Zn?
4. You have 200g of a solution that contains 30g of
hydrochloric acid (HCl), what percentage of your solution
is made up of hydrochloric acid (M/M)?
5. If I make a solution by adding water to 75 mL of ethanol
until the total volume of the solution is 375 mL, what's
the percent by volume of ethanol in the solution?

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