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
Delvig [45]
3 years ago
15

A penny has a total mass of 3.1 grams. Zinc makes up 2.9 g of the penny. What is the percentage of zinc in the penny?​

Chemistry
2 answers:
Savatey [412]3 years ago
8 0
Find the proportion, and multiply it by 100 to get the percentage.
The proportion is 2.9/3.1=0.935
The percentage is 0.935*100=93.5
Irina18 [472]3 years ago
4 0

Answer: 93.54%

Explanation: Divide the mass of the zinc by the total mass of the penny.

2.9/3.1=0.9354

To get to a percent, multiply by 100.

0.9354 x 100 = 93.54

The mass of the zinc in the penny is 93.54%.

You might be interested in
The term "cycle" is used in Water Cycle because ?
solmaris [256]

Answer:

because cycle is a prosess that goes through multiple stages

Explanation:

.

5 0
2 years ago
An archer pulls her bowstring back 0.370 m by exerting a force that increases uniformly from zero to 264 N. (a) What is the equi
Arte-miy333 [17]

Answer:

713.51 N/m

Explanation:

Hook's Law: This law states that provided the elastic limit is not exceeded, the extension in an elastic material is directly proportional to the applied force.

From hook's law,

F = ke ...........................Equation 1

Where F = Force exerted on the bowstring, e = Extension/compression of the bowstring, k = Spring constant of the bow.

Make k the subject of the equation,

k = F/e ............................ Equation 2

Given: F = 264 N, e = 0.37 m.

Substitute into equation 2

k = 264/0.37

k = 713.51 N/m

Hence the spring constant of the bow  = 713.51 N/m

3 0
3 years ago
You are given an unknown type of clothing dye. how could you use the procedures in this lab to see if this dye is a mixture?
Arte-miy333 [17]
One separation technique to be used is the paper chromatography. This works by separating the components of the mixture through the difference of their concentrations. There is a stationary phase and the mobile phase, which flows through the stationary phase. The components travel at different rates and is usually signified by the colors. If more than one color would appear, that means that the dye is a mixture.
8 0
3 years ago
Read 2 more answers
Describe the structure of an Atom (HELP!)
Marat540 [252]

Answer:

The answer is A.

Explanation:

Neutrons and protons are located in the dense middle of the atom called the nucleus, and electrons are located on the electron cloud located outside of the nucleus.

4 0
3 years ago
Question 2
Alenkinab [10]

Answer:

1.53 atm

Explanation:

From the question given above, the following data were obtained:

Volume = constant

Initial pressure (P₁) = stp = 1 atm

Initial temperature (T₁) = 273 K

Final temperature (T₂) = 144 °C = 144 °C + 273 = 417 K

Final pressure (P₂) =?

Since the volume is constant, the final pressure can be obtained as follow:

P₁ / T₁ = P₂ / T₂

1 / 273 = P₂ / 417

Cross multiply

273 × P₂ = 417

Divide both side by 273

P₂ = 417 / 273

P₂ = 1.53 atm

Therefore, the final pressure (i.e the pressure inside the hot water bottle) is 1.53 atm.

8 0
3 years ago
Other questions:
  • Important: How much energy would be required to vaporize 45.0 grams of water?
    8·1 answer
  • What is the main responsibility of scientists when enviermental laws are proposed?
    10·1 answer
  • A sample of water and alcohol are mixed. What method should be used to separate them? -Screening -Filtering -Fractional distilla
    12·2 answers
  • Using the kinetic theory what happens to oxygen particles as they are cooled
    10·2 answers
  • If Beryllium were to lose a proton, it would become a(n)
    13·1 answer
  • What is the mass of 1.75 moles of HF?
    14·1 answer
  • Why does D2O <br>have a higher boiling point than H2O ​
    12·2 answers
  • What is the purpose of the dts other auths and pre audits screen?
    5·1 answer
  • What symbol is used for the state of water vapor? <br><br> A. (l)<br> B. (aq)<br> C. (s)<br> D. (g)
    11·2 answers
  • Draw the structure of the major nitration product from the reaction of nitric acid with 1,3‑dimethylbenzene. Show all formal cha
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!