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Andrews [41]
3 years ago
5

What does a Stationary object line look like?

Chemistry
1 answer:
Paladinen [302]3 years ago
5 0

Answer:

Explanation:It looks like a graph. Google it!

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Look at the diagram of the solar system.
arlik [135]

Answer:

Retrograde Motion

Explanation:

Geocentric model of planets was proposed by Ptolemy. It stated that all sun, planets and stars revolve round the earth in circular orbits.

NOTE: Ptolemy: an ancient astronomer, geographer, and mathematician who considered the Earth the center of the universe (the "Ptolemaic system").

8 0
3 years ago
Read 2 more answers
Explain mole concept using any real life example
andrew-mc [135]

Answer:

for instance :

water , H²O , and hydrogen peroxide . H²O² , are alike

in that their respective molecules are composed of hydrogen and oxygen atomd . hope its helpful . Good luck :)

5 0
3 years ago
If I have a 200 L container filled with nitrogen at a pressure of 1.0 atm, how many moles
egoroff_w [7]
Is it250 degrees c if so it would be <span> 4.66 moles</span>
6 0
3 years ago
The mole is defined as the amount of a substance containing the same number of particles as exactly 12 g of C-12. The amu is def
Pavlova-9 [17]

Answer:

Because it wouldn't make any sense

Explanation:

First of all, I think it's important to highlight the definition of isotope.

Isotope (Wikipedia): Variants of a particular chemical element <u>which differ in neutron number</u>...

This means that two isotopes are the same element but have different net mass per atom, due to the different number of neutrons.

Therefore, it's important to make the definition on the same isotope so that the proportion is equal. If the definition would be made on different isotopes, the proportion wouldn't have any sense. Let me be clear with this example:

mass in grams of a C-12 atom = 1.9944235 × 10 ^ -23 g  --> this is the mass of a single C atom.

By definition --> 1 mol of anything = 6.02 x 10 ^ 23 particles of anything

Therefore, we know how much a single C atom weights. How many grams do you think that 6.02 x 10 ^ 23 atoms of C (i.e a mol of C) could weight??

1 single C atom ----------------------------- 1.9944235 × 10 ^ -23 g

6.02 x 10 ^ 23 atoms of C   ------------ <u>12.006 g  !!</u>

These 12 g is the same quantity than above! Therefore, 1 mol of C weights 12 g. If the definition were made with 13 g of C-13 (the other C isotope), these numbers will not be the same --> There would be a contradiction.

Regarding the second question, we need to search Ne-20 atomic mass in grams -->  3,3509177 × 10 ^ -23 g

Hence, if we follow the same rule, the amu would be 1/12 of Ne-20.

[ 3,3509177 × 10 ^ -23 g ] / 12 = 2.79 ^ -24 g

3 0
3 years ago
A marble is sitting motionless on a table. How can you make it move?
Salsk061 [2.6K]
You can pick it up and move it
8 0
3 years ago
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