<h3>
Answer:</h3>
20% calcium and 80% Bromine
<h3>
Explanation:</h3>
- The percentage composition of an element in a compound is given by dividing the mass of the element in the compound by the relative formula mass of the compound and expressing it as a percentage.
- % Composition = (mass of element in 1 mole of compound /relative formula mass of the compound) 100%
Our compound is CaBr₂
Formula mass = 200 g
Relative atomic mass of Ca = 40.078
Relative atomic mass of Br = 79.904
Therefore;
% composition of Ca = (40.078/200) 100%
= 20.039
= 20 %
% composition of Br = (79.904×2)/200) 100%
= 79.904 %
= 80%
Therefore; the approximate % composition by mass of CaBr₂ is 20% calcium and 80% Bromine
Answer:
one valence electron
Lithium has a single electron in the second principal energy level and so we say that lithium has one valence electron. Beryllium has two valence electrons.
- Lumen Learning
•A wave produced by the acceleration of an electric charge and propagated by the periodic variation of intensities of, usually, perpendicular electric and magnetic fields
In other words : They are radio waves, microwaves, visible light, and x rays are all examples of electromagnetic waves
They are produced by the motion of electrically charged particles.
I hope this helped ! :)
Answer: Triangles are the strongest shape because they have fixed angles and don't distort very easily. Much of that works because the results from the characteristics of triangles, which are the strongest of all shapes.
Explanation: Hope this helps and I can get brainliest :)
Answer:
True
Explanation:
Chemical decontamination -
It is the process of elimination or reduction of contaminants like hazardous materials and microorganisms , where chemicals and radioactive substances are used , is referred to as chemical decontamination.
The process helps to reduce the micro organisms and various other contaminants .
The liquids used for the this process are Amphyl , Lysol , Chlorox etx.
Hence, from the given statement of the question is true.
