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
Degger [83]
3 years ago
13

Calculate the mole fraction of methane in the inital mixture assuming the temperature and volume remain constant

Chemistry
1 answer:
Oxana [17]3 years ago
5 0
More info needed. Is there a picture or diagram?
You might be interested in
Boron has an average mass of 10.81. One isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent. The
Andrej [43]

The average mass of an atom is calculated with the formula:

average mass = abundance of isotope (1) × mass of isotope (1) + abundance of isotope (2) × mass of isotope (2) + ...  an so on

For the boron we have two isotopes, so the formula will become:

average mass of boron = abundance of isotope (1) × mass of isotope (1) + abundance of isotope (2) × mass of isotope (2)

We plug in the values:

10.81 = 0.1980 × 10.012938  + 0.8020 × mass of isotope (2)

10.81 = 1.98 + 0.8020 × mass of isotope (2)

10.81 - 1.98 = 0.8020 × mass of isotope (2)

8.83 = 0.8020 × mass of isotope (2)

mass of isotope (2) = 8.83 / 0.8020

mass of isotope (2) = 11.009975

mass of isotope (1) = 10.012938 (given by the question)

5 0
3 years ago
The atomic mass of magnesium is the weighted average of the atomic masses of
Debora [2.8K]

Answer:

2. All the naturally occurring isotopes of Mg.

Explanation:

You want to know the atomic mass of the magnesium you use in the lab. That’s “natural” magnesium. So, you must use the weighted average of all the naturally occurring isotopes in natural Mg.

1. and 3. are <em>wrong</em>. You won’t get the correct mass for natural Mg if you use only the artificial isotopes for your calculation.

4. is <em>wrong</em>. You must use all the naturally occurring isotopes. The two most abundant isotopes of Mg account for only 90 % of the atoms. If you ignore the other 10 %, your calculation will be wrong.

6 0
3 years ago
Which is a factor in determining the average atomic mass of an element?
kvasek [131]
The factor in determining the average atomic mass of an element is: 
B or 2 relative abundance of each isotope because the by looking at how many protons , electrons and neutrons the most isotope is of the element has relative abundance. 
7 0
3 years ago
Read 2 more answers
Please help me! During the replication phase, DNA:
Paladinen [302]
A) the DNA copies itself
6 0
3 years ago
Read 2 more answers
Please help its urgent
mrs_skeptik [129]

Answer:

C

Explanation:

I picked C because the plant is interacting with the sun which is a nonliving part of the environment.

A, B and D are wrong because seaweed, horses, and trees are living things.

8 0
2 years ago
Read 2 more answers
Other questions:
  • Write the electron configurations of these ions, potassium and magnesium
    13·1 answer
  • What would be the greatest difference in using an open ceramic coffee mug rather than an insulated mug with a lid as a calorimet
    5·2 answers
  • Phase changes occurs in which of the following<br><br>mixing paint <br>boiling water<br>a suspension
    6·1 answer
  • HELP!!!! A glass flask containing 100 milliliters of water is sealed with a rubber stopper and placed on a burner. After a while
    15·1 answer
  • Calculate the molar mass of a compound if 0.372 mole of it has a mass of 152g​
    7·1 answer
  • What is the difference between an element and a compound? (p.s. it due in 5 mins ASAP so hurry.)
    5·1 answer
  • A gas has a volume of 5.00 L at 20 degrees Celsius. What is the volume of gas at 150 degrees Celsius.
    14·1 answer
  • If you know this history quiz help please
    14·1 answer
  • How many electrons will a neutral atom of carbon have if it’s nucleus has 6 protons and 8 neutrons?
    5·1 answer
  • PLEASE HELP- CHEMISTRY QUIZ
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!