Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. How to calculate atomic mass of an element?
Copper survive as a mixture of two isotopes. The lighter isotope (Cu-63) amid 29 protons and 34 neutrons makes up 69.17% of copper atoms. The heavier isotope (Cu-65) with 29 protons and 36 neutrons constitutes the remaining 30.83% of copper atoms. The atomic mass of Cu-63 is 62.930 amu, as well as the atomic mass of Cu-65 is 64.928 amu. Use the data above to calculate the atomic mass of copper.
For a trouble that has several numerical values it is wise to organize the data into a table.
Isotope
Copper-63
Copper-65
Number of protons
29
Number of neutrons
34
36
Atomic mass
62.930 amu
64.928 amu
Abundance
69.17%
30.83%
First compute the contribution of each isotope to the average atomic mass being sure to convert each percent to a fractional abundance.
Mass contribution = mass of isotope * abundance of isotope
For Cu-63
Mass contribution = 62.930 amu * 0.6917 = 43.53 amu
For Cu-65
Mass contribution = 64.928 amu * 0.3083 = 20.02 amu
The average atomic mass of the element is the total of the mass contributions of each isotope.
Atomic mass Cu = mass contribution Cu-63+ mass contribution Cu-65
Atomic mass Cu = 43.529 amu + 20.017 amu = 63.546 amu
Reverse Hyperconjugation : The method of hyperconjugation is as well observed in the system given below, In such type of system the effect operates in the opposite direc
Biomolecules All living bodies are made up of various lifeless substances that are availabe in their cells in a extremely complex but highly organized form. These are known as
what are the chemical reactionsof the p-block elements
Question: a) If you were a newly appointed environmental engineer in a wastewater treatment plant and one of your tasks was to characterise the wastewater. According to you,
describe the construction and the working of the calomel electrode
Q. What is gluten? What is gluten? Certainly you know that gluten is the protein found in wheat. Gluten is more or less made up of equal parts of gliadin and glutenin. Look up
descuss properties of transition elements
what are the chemical properties of p-block elements?
Discuss "cohesive energy" and "electron affinity". ‘Cohesive energy’: In a chemical bond, it’s the energy required to dissociate a solid into isolated atoms or molecules as ap
What is the nature of urea? Is it acidic basic or neautral how can wr verify it?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd