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Gnesinka [82]
2 years ago
15

The following electron configuration notation represents an atom of which element?

Chemistry
2 answers:
JulijaS [17]2 years ago
8 0

Answer:

A

Explanation:

This is Silicon :)

Elan Coil [88]2 years ago
5 0

Answer:

Si

Explanation:

you can add the exponents 2+2+6+2+2= 14 electrons since it is an atom (no charge) then it also would be the number of protons, tells you it is Si.

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Often computers are described as not intelligent. How does the mindstorm prove this?
n200080 [17]

Answer:

CH4+2O2-->2H2O+CO2 chemical reaction

3 0
3 years ago
A 45 mL sample of nitrogen gas is cooled from 135ºC to 15C in a container that can contract or expand at constant pressure. Wha
Vanyuwa [196]

Answer:

V₂ =31.8 mL

Explanation:

Given data:

Initial  volume of gas = 45 mL

Initial temperature = 135°C (135+273 =408 K)

Final temperature = 15°C (15+273 =288 K)

Final volume of gas = ?

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 45 mL × 288 K / 408 k

V₂ = 12960 mL.K / 408 K

V₂ =31.8 mL

8 0
3 years ago
Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of c2h5o2.
Tpy6a [65]
C6H15O6

Good luck and don't forget to rate or mark Brainliest :)
6 0
3 years ago
Read 2 more answers
In living things what is the source of the carbon-14 that is used in radiocarbon dating
Mumz [18]
In living things, the source of the carbon-14 that is used in radiocarbon dating is carbon dioxide in the atmosphere.
Living things inhale oxygen, and exhale carbon dioxide into the atmosphere, which is why the air and atmosphere are so full of it.
5 0
3 years ago
Read 2 more answers
If you know the number of protons what else do you know the number of?
pav-90 [236]
You know the atomic number
5 0
3 years ago
Read 2 more answers
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