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defon
2 years ago
9

What was significant about the rocks Darwin found in the mountains

Chemistry
1 answer:
inn [45]2 years ago
5 0
Sea fossils were found on top of the mountains which gave evidence of evolution for continents and oceans
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Can anyone think of some interesting facts about hydrogen? I know that there are plenty, I'm just drawing a blank right now. I'l
podryga [215]
hydrogen is the lightest element in the periodic table
7 0
3 years ago
A particular atom has 58 protons and 82 neutrons. What are the atomic number, mass number, and periodic table symbol of this iso
anygoal [31]
Atomic Numbers are the number of protons within the nucleus,
which is 58 here.
Atomic Number=58
Mass Number is the sum of the protons and neutrons in the nucleus, 
=58+82
Mass Number=140
Periodic symbol of this isotope is entirely dependent on the number of protons, 58, which corresponds to the element Cerium, abbreviated as Ce in the periodic table. 
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3 years ago
Choose the nonmetallic elements from the list. Check all that apply yttrium: oxygen: boron: polonium: argon: gallium: carbon:
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Answer:

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7 0
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If Marie and Calvin dissolve 50 grams of KBr in 100 grams of water at 90oC, the solution is
hram777 [196]

Answer:

The solution is 50 %wt

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It is the same to say, that there are 50g of KBr for every 100g of H₂O

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