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Svetradugi [14.3K]
3 years ago
13

How many elements are there?

Chemistry
2 answers:
s344n2d4d5 [400]3 years ago
6 0
There are 118 elements currently on the periodic table.
svlad2 [7]3 years ago
5 0

Answer:

118 is your answer!

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What happens on a molecular level when a diatomic molecule is a gas but is then cooled to a solid?
irina1246 [14]

Answer:

As an example of the processes depicted in this figure, consider a sample of water. When gaseous water is cooled sufficiently, the attractions between H2O molecules will be capable of holding them together when they come into contact with each other; the gas condenses, forming liquid H2O. For example, liquid water forms on the outside of a cold glass as the water vapor in the air is cooled by the cold glass.

Explanation:

Hopefully that helps!

4 0
3 years ago
Which of these is the best evidence that a chemical reactions occurs when coal burns?
laila [671]

Answer:

It’s b even check quizzes

Explanation:

3 0
3 years ago
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HELP PLZZZ i put the screenshot below!!!!
steposvetlana [31]

Answer:

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8 0
3 years ago
Which of Hubble's findings supported the big bang theory? Check all that apply.
grigory [225]

<u>Out of all given options, Hubble's findings supported the big bang theory are as follows: </u>

  • The universe formed from a central point.
  • Most galaxies in the universe are moving away from Earth.
  • There are billions of galaxies in the universe, not just one.

Option C, D, and E

<u>Explanation: </u>

According to big bang theory, the universe is increasing its region of occupancy in free space. As it is known that the universe is composed of several galaxies. So this spreading of the universe is nothing but spreading of galaxies.

And this is confirmed from Hubble’s findings using Hubble’s telescope.  As they have observed that the speed at which the galaxies are travelling in free space has been increased at a faster rate.

So, the galaxies are used to move away from Earth with time at a faster rate which confirms the big bang theory of universe formation. Also, in simple words, universe started from big bang according to cosmology' standard theory, it’s just moves from everything else.

3 0
3 years ago
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A 25 Ω resistor has a voltage drop of 12 V across it. Calculate the current flowing through the resistor
Yanka [14]

Answer:

0.48

Explanation:

i =  \frac{v}{r}

because we are looking for I which is current we say

I = 12÷25 which is 0.48.

4 0
3 years ago
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