Answer:
the sun
Explanation:
the sun is not alive and plants use photosynthesis to eat the radiation emitted by the sun.
What your going to do is take away the lowest number form the highest and subtract. Thats your answer...
Answer:
19437 J
Explanation:
mass = 100 g
Initial Temperature = 23.5°C
Final Temperature = 70°C
Temperature change, ΔT = 70 - 23.5 = 46.5
Heat = ?
The parameters are related by the equation;
H = mc ΔT
where c = specific heat capacity = 4.18 J/g°C
H = 100 * 4.18 * 46.5 = 19437 J
Answer:
The pH at the midpoint in the titration of an acid with a base is
A) equal to the pK of the corresponding base.
B) equal to the pK of the corresponding acid.
C) equal to 14 minus the pK of the corresponding acid.
D) equal to 14 plus the pK of the corresponding base.
E) none of the above
Explanation:
When a weak acid is titrated with a strong base, then a buffer solution is formed.
pH of a buffer solution can be calculated by using the formula:
![pH=pKa+log\frac{[salt]}{[acid]}](https://tex.z-dn.net/?f=pH%3DpKa%2Blog%5Cfrac%7B%5Bsalt%5D%7D%7B%5Bacid%5D%7D)
Exactly at the mid point,
[conjugate base of the salt]=[acid]
So, log [salt]/[acid] =0
Hence, pH of the solution will be equal to pKa of the weak acid.
Answer is option B.
The question is asking to calculate the mass in grams of the acetone that has a volume of 28.74 ml. Base on that, the possible answer would be 22.58 grams. I hope you are satisfied with my answer and feel free to ask for more if you have questions and further clarifications