In an experiment, six people are different places around the earth drop an apple at the same time. Which apple will fall to the
earth? A. Only apple U and Z will fall to the earth B. all of the apples will fall to the earth. C. only apple U will fall to the earth D. only apples U,V,Y and Z will fall to the earth
1 answer:
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Answer:
Explanation:
The reaction we need to calculate:
1)
We need the ClO in the products side, so we use the inverse of this reaction:
2)
Now we need to combine this two:
The enthalpy of reaction:
Answer:
0.51M
Explanation:
Given parameters:
Initial volume of NaBr = 340mL
Initial molarity = 1.5M
Final volume = 1000mL
Unknown:
Final molarity = ?
Solution;
This is a dilution problem whereas the concentration of a compound changes from one to another.
In this kind of problem, we must establish that the number of moles still remains the same.
number of moles initially before diluting = number of moles after dilution
Number of moles = Molarity x volume
Let us find the number of moles;
Number of moles = initial volume x initial molarity
Convert mL to dm³;
1000mL = 1dm³
340mL gives = 0.34dm³
Number of moles = initial volume x initial molarity = 0.34 x 1.5 = 0.51moles
Now to find the new molarity/concentration;
Final molarity = =
= 0.51M
We can see a massive drop in molarity this is due to dilution of the initial concentration.