Answer:
the fossils on some of the continents were in the same spots as fossils on other continents
Explanation:
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6.7 mass because 1 atom equals 6.3 but if u add 4 it would be 6.7
So first you work out the ratio. The formula tells us that for every one 'amount' of Ca and Cthere will be 3x the amount of oxygen. So, the ratio is 1:1:3, (=5) therefore 70g divided by 5 = 14.
If 70g of CaCO3 is heated there will be (1x14) 14g Ca, (1x14) 14g C and (3x14) 42g of O.
Weight of CaO= 42+14, 56g
(I hope this is right! Good luck xx)
Answer:
its 57.56
Explanation:
dont ask me how it is just is trust me