Hydrogen has three isotopes 1h, 2h, and 3h. what is the difference between these three isotopes?
the number of protons ranges from 1 to 3.
the number of electrons ranges from 1 to 3.
the number of neutrons ranges from 0 to 2.
the number of protons ranges from 0 to 2.

1H has no neutrons

2H has 1 neutron

3H has 2 neutrons

The atomic number and the chemical properties of the isotopes are the same. The difference is only in the physical properties.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"