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
monitta
2 years ago
5

What is the number of copper atom in one naira coin which weight is 7.3g a sum of the material is 86%

Chemistry
1 answer:
Step2247 [10]2 years ago
4 0

Answer:

5.9x10²² atoms of Cu are in one naira coin

Explanation:

To solve this question we need to find the mass of Copper. Then, using its molar mass (Cu = 63.546g/mol) we must find the moles of Cu and its atoms using Avogadro's number:

<em>Mass Cu:</em>

7.3g * 86% = 6.278g is the mass of Cu.

<em>Moles Cu:</em>

6.278g * (1mol / 63.546g) = 0.099moles Cu

<em>Atoms Cu:</em>

0.099moles Cu * (6.022x10²³atoms / 1mol) =

<h3>5.9x10²² atoms of Cu are in one naira coin</h3>
You might be interested in
___________ polymers can be produced in large quantities at low cost. please. thank you.
MA_775_DIABLO [31]

Answer:

Plastic polymers

Explanation:

Plastic polymers are usually made up of synthetic and semi-synthetic polymers such as polyethylene, polystyrene etc.

Plastic polymers have a unique property called malleability. Malleability is the ability of a substance to be moulded into different sizes and shapes.

When hear is applied plastics gets soft and can be molded into different forms and then it becomes hardened after exposure to air(dried).

The plastic polymers are usually very cheap to produce in large quantities which is why it is very common in industries.

5 0
2 years ago
A flexible container holds 32.4L of gas at 55.0c. What will be the volume if the temperature falls to 17.0c
mash [69]
The answer will be 25.92 L for 17.0 c
5 0
2 years ago
How many milliliters of a 0.266 m lino3 solution are required to make 150.0 ml of 0.075 m lino3 solution?
Allisa [31]

We need an equation that would relate the concentration of the original solution to that of the desired solution. To solve this we use the equation expressed as follows, 

M1V1 = M2V2

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

M1V1 = M2V2

0.266 M x V1 = 0.075 M x 150 mL

V1 = 42.29 mL


Therefore, we need about 42.29 mL of the 0.266 M of lithium nitrate solution to make 150.0 mL of the 0.075 M lithium nitrate solution.

3 0
3 years ago
Read 2 more answers
7. A gas ______.
enot [183]

Answer:

C

Explanation:

A gas is a state of matter that has no fixed shape and no fixed volume gases have lower density than other states of matter such as solids and liquids.

7 0
3 years ago
Which of the following would most likely cause a building to erode? A. acid rain B. the heat island effect C. heat pollution D.
Elena L [17]
Yeah it should be acid rain
3 0
3 years ago
Other questions:
  • Determine the molecular mass of a gas where 3.87 g occupies 0.896 l at standard conditions.
    12·1 answer
  • Given the following equation: 4 NH3 (g)5 O2 (g) &gt;4 NO (g) + 6 H20 (I) How many moles of NH3 is required to react with 25.7 gr
    8·1 answer
  • Dissolving a spoonful of sugar in tea or coffee is an example of
    12·1 answer
  • Ammonia and gaseous hydrogen chloride combine to form ammonium chloride. NH3+HCL-&gt;NH4CL
    10·1 answer
  • Which element have the same lewis dot structure as silicon ?
    10·2 answers
  • All I need is the answer I don’t need any work shown, what is the pH= ?
    15·1 answer
  • Help me please fast....
    15·1 answer
  • How many Liters of I2 are produced when 241.6 grams of KI are reacted with excess CuBr2?
    11·1 answer
  • How many moles of magnesium oxide are formed if you burn a 2.3 mol sample of magnesium ribbon in the air? You must show ALL work
    8·1 answer
  • 8. Which type of element requires the least amount of energy to remove an electron?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!