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
enot [183]
2 years ago
9

How many moles are in 7.1x10^21 atoms of iron?

Chemistry
1 answer:
Nitella [24]2 years ago
8 0

Answer:

0.011 moles

Explanation:

There are about 6.02*10^23 atoms in a mole, so in the given sample, there are

\frac{7.01 \times  {10}^{21} }{6.02 \times  {10}^{23} }

which is about 0.011 moles.

You might be interested in
How many moles of magnesium chloride can be formed from 4.86 g of Mg and 21.27 g of Cl2?
Hoochie [10]

Answer:

Moles of magnesium chloride can be produced are 0.2 moles

Explanation:

The reaction of Mg with Cl2 is:

Mg + Cl₂ → MgCl₂

<em>Where 1 mole of Mg reacts per mole of Cl₂ to produce MgCl₂.</em>

<em />

As the reaction is 1:1, we need to convert the mass of both Mg and Cl₂ to moles. The lower number of moles will determine the moles of MgCl₂ that will be produced:

<em>Moles Mg -Molar mass: 24.3g/mol-:</em>

4.86g * (1mol / 24.3g) = 0.2 moles Mg

<em>Moles Cl₂ -Molar mass: 24.3g/mol-:</em>

21.27g * (1mol / 70.9g) = 0.3 moles Cl₂

As moles of Mg < moles of Cl₂, Mg is limiting reactant and moles of magnesium chloride can be produced are 0.2 moles

8 0
3 years ago
What happens when energy is transferred through a wave?
Alexeev081 [22]

In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels.

5 0
3 years ago
2al2o3 4al 3o2 what is the mole ra#tio of aluminum to oxygen is 4:3
erik [133]
In the reaction represented by the equation 2Al2O3-->4Al+3O2, what is the mole ratio of aluminum to oxygen?

4:3

8 0
3 years ago
Which of the following means a natural occurring solid that has a specific chemical makeup?
wolverine [178]
The answer is: A rock
8 0
2 years ago
Read 2 more answers
Pls helppp ASAP I’ll brainlest
My name is Ann [436]

Answer:

The answer is B

Explanation:

Hope that helps

4 0
2 years ago
Read 2 more answers
Other questions:
  • Which stage of the cell involves cell growth and DNA replication?
    7·2 answers
  • Define and explain what an atom is
    5·1 answer
  • Is a small whole number that appears in front of a formula in a chemical equation?
    15·1 answer
  • What can you tell me about the charge signs on the spheres
    13·1 answer
  • The mass of a toy spoon is 7.5 grams, and its volume is 3.2 ml. What is the density of the toy spoon?
    9·2 answers
  • Why is the fact that light travels at 300,000 km/s is a consequence of energy conservation?
    15·1 answer
  • Why does the state of matter change for the alliance family?
    6·2 answers
  • Humans have developed different cat breeds using the process of selective breeding.
    5·2 answers
  • Someone talk to me , don't just say hi and then leave
    11·2 answers
  • 1.The table below lists some of the common ingredients in toothpaste.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!