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Svet_ta [14]
3 years ago
8

A barrel of water weighs 60 pounds. What must you put in it for it to weigh 40 pounds?

Chemistry
2 answers:
Murljashka [212]3 years ago
6 0

A barrel of water weighs 60 pounds. What must you put in it for it to weigh 40 pounds?

A hole

astraxan [27]3 years ago
3 0

Answer:

A hole

Explanation:

put a hole in the barrel and let some water out

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Which of these is an example of a chemical change?
goblinko [34]
C. Digesting a sandwich


Is your answer

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3 0
3 years ago
Read 2 more answers
Select the correct answer.
solong [7]
I think it’s A but I’m not sure, if it’s wrong I’m sorry
7 0
2 years ago
Calculate the frequency of electromagnetic wave with the wave length 344nm ( hint: use dimensional analysis)
Svetlanka [38]
Frequency = speed of light
                      ---------------------------
                        wavelength 
 
                   =        3 x 10^8
                      ------------------------
                          344 x 10^-9
 
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Hope this helps!



5 0
3 years ago
Tried solving this multiple ways, but keep getting the wrong answer. So, I would appreciate the help. Thank you.​
Aliun [14]

Answer:

I can give you the definition ... That might help cause I honestly don't kno the answer either ;-;

Explanation:

When used as a diacritic mark, the term dot is usually reserved for the interpunct, or to the glyphs 'combining dot above' and 'combining dot below' which may be combined with some letters of the extended Latin alphabets in use in Central European languages and Vietnamese.

Here is an example:

The dot product between a unit vector and itself is also simple to compute. In this case, the angle is zero and cosθ=1. Given that the vectors are all of length one, the dot products are i⋅i=j⋅j=k⋅k=1.

5 0
3 years ago
What is the mass of 1.2 x 1023 atoms of arsenic?
Gre4nikov [31]

Answer:

14.93 g

Explanation:

First we <u>convert 1.2 x 10²³ atoms of arsenic (As) into moles</u>, using <em>Avogadro's number</em>:

  • 1.2 x 10²³ atoms ÷ 6.023x10²³ atoms/mol = 0.199 mol As

Then we can<u> calculate the mass of 0.199 moles of arsenic</u>, using its<em> molar mass</em>:

  • 0.199 mol * 74.92 g/mol = 14.93 g

Thus, 1.2x10²³ atoms of arsenic weigh 14.93 grams.

6 0
3 years ago
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