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Anika [276]
3 years ago
10

Which substance is an example of an element?

Chemistry
2 answers:
kaheart [24]3 years ago
6 0

It is B. I took the test!!

Gnoma [55]3 years ago
4 0
Copper is an element. An element is a substance that is entirely made from one type of atom.
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A 2.40 kg block of ice is heated with 5820 J of heat. The specific heat of water is 4.18 J•g^-1•C^-1. By how much will it’s temp
MrMuchimi

Answer: The temperature rise is 0.53^0C

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed by ice = 5280 J

m = mass of ice = 2.40 kg = 2400 g   (1kg=1000g)

c = heat capacity of water = 4.18J/g^0C

Initial temperature  = T_i

Final temperature = T_f  

Change in temperature ,\Delta T=T_f-T_i=?

Putting in the values, we get:

5280J=2400g\times 4.18J/g^0C\times \Delta T

\Delta T=0.53^0C

Thus the temperature rise is 0.53^0C

0 0
3 years ago
Which of the following results from acid deposition? View Available Hint(s) Which of the following results from acid deposition?
ASHA 777 [7]

Answer:

Objects made of stone, like marble headstones, are worn away.

Explanation:

Acid deposition on earth is mostly as a result of acid rain. Acid rain forms which oxides of non-metals such as nitrogen and carbon dissolves in rain water to produce weak acid.

This weak acid that is produced easily wears away materials made up of marble and other sculptures. The most active of the acid is weak carbonic acid produced by dissolution of carbon dioxide in rain water.

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2 years ago
What causes a spring to bounce up when it is pushed down and then released?
nalin [4]

(a) Pushing the spring down gives it stored mechanical energy that turns into motion

Explanation:

Pushing on the spring causes the mechanical energy, of pushing on the spring, to be stored in the spring through potential elastic energy. Due to the elasticity of the spring, when the spring is released and resumes its initial shape the stored energy is released and can be used to do work such as motion.

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3 years ago
For Part 1, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the
dezoksy [38]

Answer:

Nitrate is a polyatomic ion with the molecular formula NO⁻₃ and a molecular mass of 62.0049 u. Organic compounds that contain the nitrate ester as a functional group are also called nitrates.

4 0
3 years ago
Read 2 more answers
What are ways that we can respond to eliminate an invasive species? Choose all that apply.
Dafna1 [17]
<span>B. chemical control by use of chemicals

</span><span>D.physical control by physically removing the species 
</span><span>
A. biological control by using other living organisms to rid of invasive species 
</span>
Taken the quiz, and got them all correctly answered!
Have a good day. <span />
4 0
2 years ago
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