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beks73 [17]
3 years ago
11

When water is heated, bubbles form in the water. is this evidence of a chemical reaction? why?

Chemistry
1 answer:
Anna007 [38]3 years ago
3 0
This is not a chemical reaction because a chemical reaction is when a substance change to another and the water is just changing on his physical state.

I HOPE THIS HELPS!!
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If you begin with 72 grams of Nickel, how many moles of Ni would you have?​
Marianna [84]

Answer: 1.2 Moles of Nickel

Explanation:

So you have to transfer grams to moles.

You do this by dividing your beginning mass by the atomic mass of the element (found on the periodic table).

1 mole is equal to the atomic mass of the element. The atomic mass of Nickel is 58.6934 rounded to the proper significant figures will be 59.

72 Grams Nickel / 59 grams = 1.2 moles of Nickel

6 0
3 years ago
Select the correct answer.
AveGali [126]

Answer: your answers are between d or b

Explanation:

6 0
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There are eight diastereomers of 1,2,3,4,5,6-hexachlorocyclohexane. One of them is drawn. Draw the other seven in the cyclohexan
Marianna [84]

Answer:

Attached below diagram of the eight diastereomers

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Explanation:

The Isomer that reacts so slowly is DIASTEREOMER 8 in an E2 reaction and this is because no pair of chlorine and hydrogen atoms can assume the anti-periplanar orientation that is preferred in an E2 elimination

attached below is Diagram of the eight diastereomers ( screen shot from my drawing tool )

3 0
3 years ago
a block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. it has a mass of 213 g. what is its density? a. 638 g/cm3 b.
Juliette [100K]
Volume = 3 cm × 3cm × 3cm
             =  27 cm ³

Mass  =  213 g

Density  =  \frac{MASS}{VOLUME}
 
              = <span>\frac{213 g}{27 cm ^{3} }
</span> 
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Thus answer is D.</span>
8 0
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Explanation:

Hopefully this helps you!

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