Say hypothetically Ur rank 15 for any subject and the 15th highest mark from Ur school is 83. And the mark U get on externals after alignment say is hypothetically 97. So the mark U actually get for the subject is 83 +97 /2 and this is the mark used to calculate atar.
So theoretically from a...
it asks us to calculate mass present in a 2.25g sample, but the answer i got is 4.14622825, and yh i was shocked when the answers it self agree that its 4.14g. so how come there is more calcium carbonate present then sample lmao.
If we conserve mass number we conserving the number of protons and neutrons and these r the things which contribute to the mass of an atom. So why is it that in a nuclear reaction while mass number is conserved mass is not