Sodium
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Answer:
The final concentration of KCl is 4%
Explanation:
This is a solution with KCl and water.
12% it's a way of concentration that indicates, that in 100 mL of solution, we have 12 g of solute.
If we add 200 mL to this solution, we also have 12 g of solute but now, we have to calculate the new concentration.
New volume = 100 mL + 200 mL → 300 mL
Let's make a rule of three
In 300 mL we have 12 g of solute
In 100 mL we have (100 .12) / 300 = 4
Symbol: Cl
Number of Neutrons: 18
Atomic Number: 17
Melting Point: -100.98 °C (172.17 K, -149.764 °F)
Number of Protons/Electrons: 17
Atomic Mass: 35.4527 amu
Answer is 13.668! Or in scientific notation it would be .13668 x 10^2
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