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Dominik [7]
2 years ago
15

Pleassseee Answerrrrr

Chemistry
2 answers:
Mademuasel [1]2 years ago
6 0
Answer: true
sound waves need particles to move through
monitta2 years ago
5 0

Answer: True

Explanation:

True. Sound does not have the required energy or speed to travel through a vacuum. Light can exist almost anyplace.

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Who am I? Most of us have characteristics of both metal and nonmetals-dull or shiny, brittle, malleable or ductile. A)Metals B)N
Lelu [443]

Answer:

I think it A but im not 100%.

Explanation:

8 0
3 years ago
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why do you think the experimenter conducted this experiment in a lab rather than in the natural world, where this phenomenon was
taurus [48]

Answer:

The experimenter observed this experiment in a lab rather than natural world because it might be dangerous to the atmosphere if he does the experiment in the natural world and it was still an hypothesis so that's why he did it in the lab.

5 0
3 years ago
How many atoms of gold are in a pure gold coin weighing 12.0g?
grigory [225]
12.0g x 1 mol / 63.546g = 0.188839581mol 

<span>So, for every 1 mole, we have 6.022 x 10^23 of whatever we're measuring. This gives us a conversion factor of (1 mole / 6.022 x 10^23 atoms) or (6.022 x 10^23 atoms / 1 mole).
</span>
0.188839581 mol x (6.022 x 10^23 atoms) / 1 mol = 1.137191955 x 10^23 

<span>Remember from before that we are limited to 3 significant figures. Since our calculations are complete, we can now round down to: 1.14 x 10^23 </span>

<span>That should be your answer!

Hope it helps!
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3 0
3 years ago
Describe the day of June 21 at the North Pole in terms of daylight and darkness <br> ( science )
frosja888 [35]
On June 21, as seen from the North pole ...

-- the sun has been up, and it's been light outside,
for the past three months ... ever since March 21 . 

-- The sun won't set, and it won't be dark outside,
for another three months ... until September 21.

-- Here at the North pole, it stays daylight for six months straight.
Today, on June 21, we're exactly halfway through the period of
continuous daylight.
7 0
3 years ago
The salts NaCl and CaCl
Irina18 [472]
The answer is 8 :)
All nobel gases have 8 outer electrons.
6 0
3 years ago
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