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Kazeer [188]
3 years ago
11

PLS HELP QUICKLY I WILL GIVE 79 POINTS FOR YALL TO ANSWER THIS QUESTION!

Chemistry
1 answer:
Daniel [21]3 years ago
4 0

Answer:

Magnesium and strontium

Explanation:

11 protons and 11 electrons, 12 neutrons.

The atomic number of sodium is 11, therefore the number of electrons and protons are 11. The atomic mass is 23, and to find neutrons you need to subtract the atomic number from the atomic mass, therefore the number of neutrons are 12.

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Which of the following units is an SI base unit?
Kisachek [45]

Answer:

kg

Explanation:

kilogram√

m³×

cm×

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5 0
3 years ago
Elements K and L have 12 and 17 protons respectively. If k has 24 neutrons and L has 36, in a tabular form identify the number o
Delvig [45]

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5 0
3 years ago
The first excited vibrational energy level of diatomic chlo- rine (Cl2) is 558 cm^-1 above the ground state. Wave- numbers, the
Usimov [2.4K]

Answer:

The answer is "0.0000190 and 2.7 J".

Explanation:

\to P_4=\frac{e^{-\beta}(4+\frac{1}{2}) hev}{2vb}\\\\

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Given:

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E=\frac{hcv}{KT}\\\\

by putting the value into the above formula so, the value is 2.7 J  

6 0
3 years ago
The thickness of a 6.00 cm square piece of Al that has a mass of .842 g and a density of 2.70 g/cm^3
lutik1710 [3]
Volume = Mass / Density
Volume =  .842 / 2.70
Volume = .31185 cubic centimeters
Aluminum square * depth = .31185 cubic centimeters
6 * 6 * depth = .31185 cubic centimeters
depth = (.31185 cubic centimeters) / 36
<span><span><span>depth = 0.0086625514 centimeters

(That must be aluminum foil.)

</span> </span></span>





7 0
4 years ago
Determine the number of three egg omelets that can be prepared from 4 dozen eggs
AveGali [126]

4 dozen eggs= 48 eggs

48 eggs/ 3 eggs

16 three egg omelets can be made

5 0
3 years ago
Read 2 more answers
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