Calculate the average atomic mass of the bromine atom

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The average atomic mass of an element is the weighted average of the masses of its isotopes, taking into account their natural abundances. To calculate the average atomic mass of bromine, we need to determine the masses of its isotopes and their relative abundances.

The two isotopes of bromine are Br-79 and Br-81. The mass of Br-79 is 78.918 amu, while the mass of Br-81 is 80.916 amu. The natural abundance of Br-79 is 50.69%, while the natural abundance of Br-81 is 49.31%.

Bromine Atomic Mass

Bromine Atomic Mass

To calculate the average atomic mass of bromine, we multiply the mass of each isotope by its natural abundance, and then add the results:

(mass of Br-79) x (natural abundance of Br-79) + (mass of Br-81) x (natural abundance of Br-81)

= (78.918 amu) x (0.5069) + (80.916 amu) x (0.4931) = 39.9129 amu + 39.9253 amu

= 79.8382 amu

Therefore, the average atomic mass of bromine is 79.8382 amu.

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4.
On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

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Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

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For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

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Calculate the average atomic mass of the bromine atom.

CBSE CLASS XII Related Questions

1.
Why are magnesium blocks attached to iron water pipelines?

2.
Write mechanism of acid dehydration of ethanol to ethene.

3.
Write any two fat soluble vitamins.

4.
On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

5.
Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

6.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

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SUBSCRIBE TO OUR NEWS LETTER

Calculate the average atomic mass of the bromine atom.

CBSE CLASS XII Related Questions

1.Why are magnesium blocks attached to iron water pipelines?

2.Write mechanism of acid dehydration of ethanol to ethene.

3. Write any two fat soluble vitamins.

4.On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

5.Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

6.For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Why are magnesium blocks attached to iron water pipelines?

2.
Write mechanism of acid dehydration of ethanol to ethene.

3.
Write any two fat soluble vitamins.

4.
On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

5.
Give structures of A, B and C: Aniline $\xrightarrow{Br_2/H_2O}$ A $\xrightarrow{NaNO_2+HCl, 0-5^\circ C}$ B $\xrightarrow{H_3PO_2+H_2O}$ C

6.
For decomposition of $H_2O_2$ by $I^-$: Step I: $H_2O_2 + I^- \rightarrow H_2O + IO^-$ (slow). Step II: $H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2$ (fast). (a) Write rate law. (b) Determine order w.r.t. $H_2O_2$ and $I^-$ and overall order. (c) Molecularity of Step II.