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Free_Kalibri [48]
3 years ago
13

How many neutrons are there in 9 molecules of P4 with mass number 31 and proton number 15?

Chemistry
2 answers:
aalyn [17]3 years ago
7 0

A = mass number which is equal to the total number of protons + number of neutrons, Z= atomic number of any element which is also indicates Number of protons or number of electron in the given atom.


The formula to calculate neutron would be :

mass number - proton  

31   - 15     = 16

Thus 16 neutrons are found in one atom of P  

There are 4 atom in one molecule

Thus  

4 atom /1 molecule * 9 molecule * 16 neutron / 1 atom  

= 4*9*16= 576 neutrons


Phoenix [80]3 years ago
7 0
The formula to calculate neutron would be :

mass number - proton 

31   - 15     = 16

Since it got 9 molecules, you need to multiply this by 9 , 

16 x 9  = 144

hope this helps


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