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ratelena [41]
3 years ago
15

Atmos of given elements will have the same mass true or false .

Chemistry
2 answers:
Shkiper50 [21]3 years ago
8 0

True because,

Atoms of different elements have different masses because different atoms have a different number of subatomic particles i.e neutrons, protons and electrons.

Atomic mass of an element cannot be same as the mass of a single atom of that element because by investigation of mass spectrometry it was found that many naturally occurring elements exist in the form of two or more isotopes. Isotopes are the atoms of the same elements having the same atomic number containing the same number of protons but the different number of neutrons and because of this, it possesses different mass number. So, the observed atomic mass of the atom of an element is the average atomic mass of the elements. Average of masses of a different isotope of the same element is taken and then the atomic mass of the element is decided.

A formula to calculate average atomic mass:-

Example:-

Lithium exists in nature in the form of two isotopes Li−6 and Li−7 with atomic masses 6.0151u and 7.0160u and the percentages 7.59 and 92.41 respectively.

Solution:- Average atomic mass of Li

[Atomic mass of Li−6× percentage + Atomic mass of Li−7× percentage]/100

=

100

6.015u×7.59+7.0160u×92.41

​

=6.939u

Hence, the atomic mass of an element is not the same as the mass of a single atom of that element; Atomic mass is average of isotopic mass o atoms.

strojnjashka [21]3 years ago
8 0

Answer:

TRUE BRUHHHH maybe

Explanation:

TRUE BRUHHHHHHHGGGHHHGHGHGHGHHHHHHHHHHHHHHHHHHHHHHH

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Match each state of matter to its description.
WARRIOR [948]

Answer:

Explanation:

solid would be a wall e.g

liquid would be water e.g

gas would be oxygen e.g

6 0
3 years ago
Use the ideal-gas law to estimate the number of air molecules in your physics lab room, assuming all the air is N2. Assume a roo
stiv31 [10]

Answer:

4.13×10²⁷ molecules of N₂ are in the room

Explanation:

ideal gases Law → P . V = n . R . T

Pressure . volume = moles . Ideal Gases Constant . T° K

T°K = T°C + 273 → 20°C + 273 = 293K

Let's determine the volume of the room:

18 ft . 18 ft . 18ft = 5832 ft³

We convert the ft³ to L → 5832 ft³ . 28.3L / 1 ft³ = 165045.6 L

1 atm .  165045.6 L = n . 0.082 L.atm/mol.K . 293K

(1 atm .  165045.6 L) / 0.082 L.atm/mol.K . 293K = n

6869.4 moles of N₂ are in the room

If we want to find out the number of molecules we multiply the moles by NA

6869.4 mol . 6.02×10²³ = 4.13×10²⁷ molecules

4 0
3 years ago
Near Cozumel, Mexico, a scuba diver goes down 60 ft to look at the sea creatures. As she descends, the air pressure increases. W
Rudik [331]

Answer: Boyle's Law

Explanation:

Boyle's Law which is also called Mariotte's law was formulated by physicist Robert Boyle in 1662.

It posits that the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature.

As the Scuba Diver went deeper, the volume of air dropped so the pressure increased.

Please do react or comment to the answer if you have any issues or if you feel like this helped you so we can help others as well. Thank you.

5 0
3 years ago
Which of the solids in the following set should you test to investigate for the effects of ANIONS on pH? Will give brainliest
Alik [6]

Answer:

KCIO

Explanation:

the only reason is because I looked online and the meaning for that is potassium hypochlorite my guy so if this is not right then I'm sorry but good luck.

3 0
3 years ago
The matter through which waves travel is called a/an​
sweet [91]

Answer:

A medium.

<h3>Explanation:</h3>

It's the material the wave is travelling through.

5 0
3 years ago
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