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3 years ago

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Chemistry

1 answer:

kolbaska11 [484]3 years ago

5 0

Answer:

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Explanation:

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Average atomic masses listed by IUPAC are based on a study of experimental results. Bromine has two isotopes 73 br and81 br, who

ddd [48]

Answer: The average atomic mass of element bromine is 80.4104 amu.

Explanation:

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

For _{35}^{79}\textrm{Br}[/tex] isotope:

Mass of $_{35}^{79}\textrm{Br}$ isotope = 78.9183 amu

Percentage abundance of $_{35}^{79}\textrm{Br}$ isotope = 50.69 %

Fractional abundance of $_{35}^{79}\textrm{Br}$ isotope = 0.5069

For $_{35}^{81}\textrm{Br}$ isotope:

Mass of $_{35}^{81}\textrm{Br}$ isotope = 80.9163 amu

Percentage abundance of $_{35}^{81}\textrm{Br}$ isotope = 49.31 %

Fractional abundance of $_{35}^{81}\textrm{Br}$ isotope = 0.4931

Putting values in equation 1, we get:

$\text{Average atomic mass of Bromine}=[(78.9183\times 0.5069)+(80.9163\times 0.4931)]$

$\text{Average atomic mass of Bromine}=80.4104amu$

Hence, the average atomic mass of element bromine is 80.4104 amu.

5 0

3 years ago

Which reagent is used to convert benzoyl to benzaldehyde?

solong [7]

Answer:

Hello dear,

● Benzene to benzaldehyde -

There are several ways to convert benzene into benzaldehyde.

1) Riemer-Tiemann reaction -

- In this reaction, benzene is converted to benzaldehyde with the help of CHCl3 & NaOH.

C6H6 ---> C6H5-CHO

Catalyst - CHCl3 & NaOH

2) Gatterman-Koch reaction -

- In this reaction, benzene is converted to benzaldehyde with the help of CO/HCl & AlCl3/CuCl.

C6H6 ---> C6H5-CHO

Catalyst - CO/HCl & AlCl3/CuCl

[Refer to image attachment for better understanding.]

Hope this helps...

Explanation:

8 0

2 years ago

Read 2 more answers

Will give brainliest, like, 5 stars and 5 points to best answer

Oliga [24]

evaporation systems allow for an endless source of water. you can grab cups of water straight from the sea or even a lake. the use of evaporation allows for you to drink water thats even healthier than getting it from a cloud and it will leave all of the bad parts that used to be in the water in the first container you pour into. this system is most useful in hot climates such as places near the equator.

6 0

3 years ago

What is the charge of an ion that has 12 protons and 13 electrons

AlekseyPX

Each proton serves as a positive charge and each electron serves as a negative charge. The two charges neutralize each other on a 1:1 ratio. In your question, you have 12 protons to 13 electrons. That means there's a net -1 charge because there is one more electron than protons.

8 0

4 years ago

Help me please!!!!!!!!!

melomori [17]

Stored water is gravitational

3 0

3 years ago

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