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Finger [1]
3 years ago
11

Which principal is exemplified by studying a modern river to learn about how ancient rock layers form?

Chemistry
1 answer:
faust18 [17]3 years ago
7 0
A- unifromitariansim
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Do Atoms of one element change into Atoms of another element during chemical reactions
Katena32 [7]

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Who was the first U.S. secretary of state to ever visit the remote cook islands in the south pacific
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3 years ago
How many moles of CaO will be produced from 23.9 g of Ca?<br>2Ca(s) + O2(g) – 20:0(3)<br>mol​
inessss [21]

Answer:

0.6 moles of CaO will produced.

Explanation:

Given data:

Mass of calcium = 23.9 g

Moles of CaO produced = ?

Solution:

Chemical equation:

2Ca + O₂ → 2CaO

Number of moles of calcium:

Number of moles = mass/ molar mass

Number of moles = 23.9 g / 40 g/mol

Number of moles = 0.6 mol

Now we will compare the moles of calcium and CaO.

            Ca         :          CaO

              2          :          2

            0.6         :        0.6

 0.6 moles of CaO will produced.

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3 years ago
PLEASE HELP
morpeh [17]
<span>conductor because it conducts the electrons</span><span />
6 0
3 years ago
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