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ZanzabumX [31]
3 years ago
14

How much energy is needed to turn 23 g of water completely into steam if it starts at a temperature of 8.0oC?

Chemistry
1 answer:
asambeis [7]3 years ago
6 0

Answer:

69% energy

Explanation:

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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.

4 0
3 years ago
Please I need this help me​
BaLLatris [955]

Answer:

first of all is that really chemistry

3 0
3 years ago
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White raven [17]

Answer: I am confident the answer is B

Explanation:

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5 0
3 years ago
I really need help, I don’t know what to do on this
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Answer:

A: dependent variable

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C: independent variable

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Explanation:

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What is the best description of the side of the moon that faces earth?
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Hope this helps :)
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