Answer:
Step-by-step explanation:
Rate of change= slope/gradient (Constant of proportionality, slope, unit rate)
Answer:
Step-by-step explanation:
Given that,
The pH of the solution = 12.24
We need to find the H⁺ concentration of the solution. We know that,
![pH=-log[H^+]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D)
Put pH = 12.24
So,
![12.24=-log[H^+]\\\\\[H^+]=4.83\times 10^{-6}](https://tex.z-dn.net/?f=12.24%3D-log%5BH%5E%2B%5D%5C%5C%5C%5C%5C%5BH%5E%2B%5D%3D4.83%5Ctimes%2010%5E%7B-6%7D)
So, the concentration of H+ is .
A) √50 = √(25 x 2) =√(5² x 2) = 5√2, what Jacklyn did is the other way round, instead of putting the perfect square out of the radical & keep the 2 inside, she inversed the sens of the operation
b) We have to find the square of the smaller & largest numbers that are near 50:
7² = 49 & 8² = 64==> so 49<50<64 & the number is between the square root of 7 & the square root of 8, but we also notice that 50 is very very near 49, hence let's try 7.1==> 7² = 7.1 x 7.1 = 50.41, which is a very good approximation. Then the approx. to √50 ≈ 50.41
Answer:
10 hours
Step-by-step explanation:
volume of lower portion = 85x125x40 = 425,000
volume of upper portion = 20x30x125 = 75,000
in 1.5 hours, the pump removed 75,000
in one hour it removed 50,000 (75000/1.5 = 50,000)
425,000 / 50,000 = 8.5 hours for bottom portion
8.5 + 1.5 = 10 hours total time for top and bottom
