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Tasya [4]
3 years ago
10

Chemistry is: a) the mystical search for the elixir of life. b) speculation about the nature of matter. c) the study of matter a

nd the changes it undergoes. d) none of thes
Chemistry
1 answer:
Yuki888 [10]3 years ago
7 0

Answer:

c) the study of matter and the changes it undergoes

Explanation:

Chemistry -

It is the sub topic of science , dealing with the study of matter , the properties of matter , the type of interaction between the particles of matter , the reason for the particle of matter to combine and separate in order to form new substance .

The basic concepts of chemistry are applicable on the day to day activities.

Hence, from the given options , the correct statement is c) the study of matter and the changes it undergoes.

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How many molecules of CH4 are in 24.1 g of this compound?
jok3333 [9.3K]

<u>1) find molar mass of CH₄</u>

=12.01+4(1.01)\\\\=16.05\ g/mol

<u>2) determine moles of CH₄</u>

=24.1g\ CH_{4}\ x\ \frac{1\ mol\ CH_{4}}{16.05g\ CH_{4}}\\\\=1.501557632\ mol\ CH_{4}

<u>3) multiply by avogadro's number</u>

=1.501557632\ mol\ CH_{4}\ x\ \frac{6.022\ x\ 10^{23}\ molecules\ CH_{4}}{1\ mol\ CH_{4}} \\\\=9.04238006\ x\ 10^{23}\\\\=9.04\ x\ 10^{23}\ molecules\ CH_{4}

7 0
2 years ago
I need help of these two questions please
STatiana [176]

Answer:

Below

Explanation:

The balanced equation for h202 = h20 + 02 is:

2H2O2 = 2H20 + O2

The coefficients would be 2  

The balanced equation for Na + I2 = NaI is:

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The coefficients would be 2

Hope this helps! :)

8 0
3 years ago
Acid and an alkali combined together will give a salt,if they are mixed in the right amount
algol13
A Neutralisation reaction, the alkali is neutralizing the acid.

3 0
3 years ago
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Group 1, period 7 element
Serhud [2]

Answer:

Period 7 element

Hydrogen  

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Explanation:

8 0
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cricket20 [7]
In scientific notation, a number is less than ten but more than one.

Move the decimal point from 0, 250.000 <- this is the same as 250 to between 2 and 5.

I had to move two spaces.

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I hope this helps!
~kaikers
4 0
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