1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
agasfer [191]
3 years ago
7

36g of an alloy of copper and zinc contains 45% copper. how much pure copper do you need to add in order to get a 60% copper all

oy?

Chemistry
1 answer:
iogann1982 [59]3 years ago
7 0
First, you need to count copper mass in alloy.
Second, you have to make an equation an find x ( the copper mass must be added). The answer is: 13,5g pure copper

You might be interested in
A chemist has a small amount of compound ( b.p. = 65 oC) that must be fractionally distilled. Yet, the Chemist does not want to
koban [17]

Answer:

The chemist can either:

a. Use a small fractionation apparatus.

b. Add a compound with a much higher boiling point.

Explanation:

Using a smaller fractionation apparatus or Vigreux column will help to minimize loss of the distillate.

If a compound with a higher boiling point is added, the vapors of this liquid will displace the vapors of this small amount of compound with a lower boiling point. This compound with a higher boiling point is known as a Chaser.

6 0
3 years ago
What is the correct definition of energy?
scoray [572]

Answer:

The ability to do work

Explanation:

  • Energy refers to the ability to carry out work.
  • It is measured in Joules (J).
  • Energy may exist in different forms such as potential energy when a body is at rest, kinetic energy when the body is in motion, etc.
  • Energy can neither be created nor destroyed, however, it can be transformed from one form to another. For example, chemical energy may be transformed into mechanical energy or other forms of energy.
6 0
3 years ago
Read 2 more answers
The density of whole blood is 1.05 g/ml. a typical adult has between 4.7 and 5.5 l of whole blood. what is the mass in pounds of
Kisachek [45]
<span>1.05 g/ml * 1000 ml = 1050g/l because of 1g/ml = 1 kg/l so, a/q mass of 4.7 l of whole blood in pound = 4.7 * 1050 = 4935 g so in pound 4935g = 10.87981p</span>
5 0
3 years ago
Why is it so difficult to experience the northern lights here in michigan? I need to know noww
Anni [7]

Answer:

Think about where you're located on the globe. That'll tell you your answer

Explanation:

7 0
3 years ago
After reading the list of physical properties above, you realize that they are describing a substance that is a
Alecsey [184]

The answer is B

Hope this helps!

5 0
3 years ago
Other questions:
  • All matter on earth contains energy
    10·1 answer
  • All questions attatched :)
    12·1 answer
  • Calcium has a cubic closest packed structure (fcc) as a solid. Assuming that calcium has an atomic radius of 197 pm, calculate t
    12·1 answer
  • What volume change occurs to a 400.0 mL gas sample as the temperature increases from 22.0 °C to 30.0°C?
    5·1 answer
  • The volume of a sample of gas, initially at 25 °C and 158 mL, increases to
    10·1 answer
  • 140 g of KCl is dissolved in 600 mL of water. What is the molarity?
    15·1 answer
  • What do all of the inventors discussed in this lesson have in common?
    13·1 answer
  • why do many parts of the world need resources of water different from the ones used in United Kingdom?
    7·1 answer
  • WILL GIVE BRAINLIEST!!!
    8·1 answer
  • I Need Help on these science questions
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!