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Mama L [17]
3 years ago
9

If you throw a ball into the air, the force of ________ makes the ball fall back toward Earth.

Chemistry
2 answers:
larisa86 [58]3 years ago
7 0
B.) gravity
Explanation: gravity makes sense
Tanya [424]3 years ago
6 0
Acceleration is when something is being moved forward or back, motion is just movement, friction is two or more things rubbing together, so the answer should be B. gravity
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What does an emission spectrum show?
IrinaVladis [17]

It shows the type of atoms/elements in a substance

Different types of atoms have different emission spectrum - a concept supported by Bohr quantum theory - hence one is able to identify elements in a substance using a method called spectroscopy.

Explanation:

When an electron jumps from a low energy orbital to a higher energy orbital in an atom, it absorbs a specific wavelength of electromagnetic radiation (This is called absorption spectrum). Vice versa, if the same electron jumps from a higher to a lower energy orbital it releases the equivalent quantum energy in electromagnetic wave (This is called emission spectrum). Different types of atoms of different elements have a unique spectrum identifier.

Learn More:

Learn more about spectroscopy;

brainly.com/question/3822641

brainly.com/question/13435562

#LearnWithBrainly

3 0
3 years ago
Where are the noble gases on the periodic table and what characteristics do they have?
OlgaM077 [116]
<span>the noble gases are those who occupy the eighth group of the periodic table and are so called because having the complete valence shell do not need to form bonds with other atoms and are thus in atomic form ...
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The noble gases (also called rare gases) are of the inert gases that constitute the eighteenth [1] group of the periodic table of the elements, ie, the right-most column. They consist of atoms with electron shells full. It includes the following elements: helium neon argon krypton xenon radon Ununoctium <span>Sometimes they (particularly helium) are located together with other gases (mostly nitrogen and methane) into endogenous sources; helium of endogenous origin comes from the decomposition of radioactive elements present in the subsurface that emit α particles (ie ions He2 +): These oxidized species present in the soil and become elio.I atoms of the noble gases are all monatomic gas, not easily liquefiable, present the atmosphere in different percentages; the most common is argon which is approximately the 0.932%.</span>
4 0
3 years ago
Read 2 more answers
How many moles are 7.25 x 1023 formula units of Mgo ?
romanna [79]

Answer:

<h2>The answer is option D</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{7.25 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{7.25}{6.02}  \\  = 1.2043189368...

We have the final answer as

<h3>1.20 moles</h3>

Hope this helps you

6 0
2 years ago
Thermal energy always moves from where there is ____of it to where there is ____of it until ____.
DENIUS [597]

Answer:

Thermal energy always moves from where there is<u> more </u>of it to where there is<u> less </u>of it until <u>distributed</u>.

Explanation:

Its true, just don't know if its correct for your assignment

5 0
3 years ago
Read 2 more answers
Please help like now please
DENIUS [597]
Pictures are grayed out
7 0
3 years ago
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