Answer:
c)
Explanation:
don't understand properly but it is c) cause they go through gens
Quarts of pure antifreeze must be added to 5 quarts of a 20 antifreeze solution to obtain a 50 antifreeze solution is 3.
Antifreeze solution is a solute that lowers the freezing point of the liquid in a solution.
For calculating the amount of quarts of pure antifreeze solution added can be given by:
5×20/100 + x × 100% = (x+5) × 50/100
Where, x is the amount of antifreeze required for addition and pure antifreeze is 100% of the antifreeze taken.
1 + x = (x+5) 0.5
1 + x = 0.5x + 2.5
0.5x = 1.5
x = 3
So, 3 quarts of pure antifreeze must be added to 5 quarts of a 20 antifreeze solution to obtain a 50 antifreeze solution.
Learn more about Antifreeze solution here, brainly.com/question/14619701
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The molar mass is 65.38 u
Explanation:
Number of protons means atomic number of an atom. Element whose atomic number is 27 is cobalt.
When an atom is neutral then the number of protons equal the number of electrons.
Cobalt is a transition element or it is also known as d-block element. The electronic configuration of cobalt is as follows.
