Answer:
Lavoisier made an important contribution to chemistry by the law of conservation of mass
Explanation:
The law of conservation of mass tell us, that the mass doens't change in a system. You have the same mass at the begining and in the end of a reaction.
Matter is neither created, nor destroyed in a chemical reaction.
This law also states that mass of reactants is the same of products in any chemical reaction
Bismuth, it’s elemental!
Bismuth, Agent 83
Bismuth, what a catalyst?
I like you more than Bismuth
Bismuth, we love you
Get things done with Bismuth
It’s a Bismuth thing, you wouldn’t understand
Bismuth, it’s a brittle thing
Got Bismuth?
Bi Bro
Bismuth born Brittle
Silvery by default like Bismuth
Bi the one with Bismuth
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Answer:
Atomic mass of Gallium is 69.7230 amu
Explanation:
100 atoms of gallium contains 60.11 number of 
atoms and 39.89 number of 
atoms.
Therefore atomic mass of gallium is given by-
= 
= 69.7230 amu
