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
the standard EMF of cell Pt/H2
Properties of Unsaturated halides (Halo-alkene) Halo-alkene is a colourless gas at room temperature. The boiling point of it is -13°C. The halogen atom in vinyl chloride is not
Write a conclusion on project "medicines uses''
Plz tell me the units of absorptivity if it has any units
Liebermann's nitroso reaction While phenol is reacted with NaNO 2 and concentrated H 2 SO 4 , it provides a deep green or blue colour which changes to red on dilution with wa
#questio1. Alcohols and amines are both nucleophilic. Explain why this reaction occurs to form Benadryl (diphenhydramine)n..
Q. Show the Colour of actinides and lanthanides Ions? Ions of actinides and lanthanides are coloured in the solid state as well as in aqueous solution, as is the case with the
oxidation state of p-block elements?
why is the mass of acid measured not the volume?
Q. What is Hydrate Isomerism? In a compound, water molecules may be present in either coordinated form or as water of crystallisation In the former case water molecules are di
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