Water can resist a greater external force than ethanol can. Which statement best describes this difference? Water has less capil
2 answers:
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Answer: The tree died 9709.46 years before.
Explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant = 100
a - x = amount left after decay process =
a) to find rate constant
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
b) to know the age
The tree died 9709.46 years before.
Answer:
2.1 M
Explanation:
The dilution equation is .
= the molarity of the sock solution
= the volume of the sock solution
= the molarity of the diluted solution
= the volume of the diluted solution
The stock solution would be what is doing the diluting, so "175 mL of a 3.00 M solution". So = 3.00 M. Then: Converting 175 mL to liters:
(This is
)
And converting 250 mL KCl to liters: (This will be
)
Then, we plug in our given into the dilution equation, resulting in:
(divide both sides by 0.250 L, in order to get
by itself)
So, the molarity of 250 mL KCl made by diluting 175 mL of a 3.0 M solution would be 2.1 M (mol/L).
Hopefully this helped you understand the topic a little bit better. I just finished molarity and dilutions in Chemistry last week. Good luck!