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
masya89 [10]
3 years ago
11

calculate the average atomic mass for neon if its abundance in nature is 90.5% neon-20, 0.3% neon-21, and 9.2% neon-22

Chemistry
1 answer:
Maru [420]3 years ago
4 0
The average atomic mass of Neon would simply be the sum of the weighted average of each isotope. That is:

average atomic mass = 0.905 * 20 + 0.003 * 21 + 0.092 * 22

average atomic mass = 20.187 amu 


You might be interested in
A 5.0-gram sample of zinc and a 50.-milliliter sample of hydrochloric acid are used in a chemical reaction. Which combination of
Radda [10]
The answer is Zine powder and 3.0 M HCl (aq)
7 0
3 years ago
Read 2 more answers
Peroxyacylnitrate (PAN) is one of the components
coldgirl [10]

C – 19,9%, H – 2,2%, N – 11,6%, O – x%

M=120\frac{g}{mol}

1 percentage

The entire molecule is 100% and all the components of the compound add up to 100%.

100% - 19,9% - 2,5% - 11,6% = 66,1%

The compound contains 66,1% oxygen.

2 molar masses

M_{C}=12,01\frac{g}{mol}

M_{H}=1,008\frac{g}{mol}

M_{O}=15,999\frac{g}{mol}

M_{N}=14,007\frac{g}{mol}

3 masses

The compound has a molar mass of 120g/mol. So one molecule weighs 120 g. To find out how much the percentage of a component weighs, you have to calculate it using the molar mass.

<u>carbon</u>

19,8% of 120g

m=120g*0,198\\m=23,76g

One molecule contains 23,76g of carbon.

<u>hydrogen</u>

2,5% of 120g

m=120g*0,025\\m=3g

One molecule contains 3g of hydrogen.

<u>oxygen</u>

66,1% of 120g

m=120g*0,661\\m=79,32g

One molecule contains 79,32g of oxygen.

<u>nitrogen</u>

11,6% of 120g

m=120g*0,0,116\\m=13,92g

One molecule contains 13,92g of nitrogen.

4 amount of substance

<u>carbon</u>

<u />n=\frac{23,76g}{12,01\frac{g}{mol} }\\n=1,98mol<u />

The compound contains about 2 moles of carbon.

<u>hydrogen</u>

n=\frac{3g}{1\frac{g}{mol} }\\n=3mol

The compound contains about 3 moles of hydrogen.

<u>oxygen</u>

n=\frac{79,32g}{15,999\frac{g}{mol} }\\n=4,96mol

The compound contains about 5 moles of oxygen.

<u>nitrogen</u>

<u />n=\frac{13,92g}{14,007\frac{g}{mol} }\\n=0,99mol<u />

The compound contains about 1 moles of nitrogen.

5. molecular formula

The formula results from the ratio of the amounts of substance.

n_{C} :n_{H} :n_{O} :n_{N} =2:3:5:1\\C_{2}H_{3}NO_{5}

8 0
3 years ago
What is the part of the male reproductive organ that stores newly-formed sperm cell?
ratelena [41]

Answer:

B. Epididymis

Explanation:

Sperm are stored in the epididymis until fully developed. The epididymis is located on the back part of the testis, the male’s reproductive organ.

6 0
3 years ago
Match the Terms to their definition:
olganol [36]
1. B
2. H
3. G
4. I
5. D
6. C
7. A
8. F
9. E
I am not sure weather it is correct but I wrote what I know
3 0
3 years ago
Read 2 more answers
Alice and Marge are studying the properties of matter. The girls cut some silver-colored magnesium sheets into 3-inch long strip
frosja888 [35]
<span>B) Magnesium reacts in acids</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • What happens to the total current provide by a battery as bulds add to a parallel Circuit
    14·1 answer
  • One consequence of the third law of thermodynamics is that A. heat engines have efficiencies less than 100 percent. B. in some e
    5·2 answers
  • This question is very hard and I'm having trouble with it<br>​
    14·1 answer
  • A solution has [OH-] of 1x10^-2, what is the pOH of this solution
    5·1 answer
  • In each equation, label the acids, bases, and conjugate acid-base pairs. (Type your answer using the format [NO3]- for NO3-.)
    12·1 answer
  • A student prepared several aqueous sodium chloride (NaCl) solutions to observe boiling point elevation at various molal concentr
    9·1 answer
  • What is the role of nitric acid during silver nitrate test for halide?​
    10·1 answer
  • How are producers and consumers related?
    14·2 answers
  • Drag the slider from January to December. Based on what you observe, do you think Barcelona has large temperature changes throug
    14·1 answer
  • A commonly held idea about influenza is that it is a disease that occurs primarily in cold weather. Doctors report incidences of
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!