Question

What is the mass defect (in kg), if a 40 over 20 Ca has an expected mass of 40.3313 amu and an actual mass of 39.9626 amu?

1 amu = 1.66 × 10-27 kg
Answer

0.369 kg

6.12 × 10-28 kg

80.3 kg

1.33 × 10-25 kg

Answer 1

http://www.chem.purdue.edu/gchelp/howtosolveit/Nuclear/nuclear_binding_energy.htm
The first section shows how to calculate mass defect. :)

Answer 2

uhh that site doesnt come up for me?

Answer 3

It' the same thing...u have to use \(E=mc^2\)

Answer 4

so how do i set it up

Answer 5

you should really check the article @JoannaBlackwelder just gave u....that can make u understand better

Answer 6

yeah im sure it will, except the fact that it will not load and im getting a 404 error

Answer 7

Here is the main part of how to calculate.
To calculate the mass defect:
add up the masses of each proton and of each neutron that make up the nucleus,
subtract the actual mass of the nucleus from the combined mass of the components to obtain the mass defect.

Answer 8

use this

Answer 9

There you go. Can you read it on that document?

Answer 10

Good idea, @Abhisar :)

Answer 11

im doing it wrong because every time i do it im getting a number not in my options. damn i hate everything that has to do with chemistry

Answer 12

Once you get an answer in amu, did you convert to kg?

Answer 13

Also, how many protons and how many neutrons did you get?

Answer 14

yes haha

Answer 15

:)

Answer 16

What was the number of protons and the number of neutrons you got?

Answer 17

already got rid of it but i know it was wrong XD

Answer 18

When you have the 40 is the sum of protons and neutrons and the 20 is the number of protons.