Googles Definition of Convection: <span>the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

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4 0

3 years ago

An aqueous solution contains 0.397 M ammonia. Calculate the pH of the solution after the addition of 4.63 x 10-2 moles of perchl

SSSSS [86.1K]

Answer:

9.308

Explanation:

The computation of the pH of the given solution is shown below:

But before we need to determine the HI molarity which is

$Molarity\ of\ HI = \frac{moles}{volume \ in\ L}$

$= \frac{4.63\times10^{-2}}{0.250}$

= 0.1852 M

Now

As we know that

$NH_3 + HI = NH_4I$

So,

$NH_4I = HI = 0.1852 M$

Now the molarity of $NH_3$ left is

= 0.397 - 0.1852

= 0.2118

$pOH = pKb + log (\frac{NH_4I}{NH_3})$

$= 4.75 + log(\frac{0.1852}{0.2118})$

= 4.692

Now as we know that

pH = 14 - pOH

= 14 - pOH

= 14 - 4.692

= 9.308

We simply applied the above equations

5 0

3 years ago

Dr. Garcia is performing an experiment to see how cell division in flies is affected by the addition of a certain protein, calle

Paha777 [63]

<span>Dr. Garcia should compare fly cells to human cells.
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3 0

2 years ago

Read 2 more answers

On a planet where the temperature is so high, the ground state of an electron in the hydrogen atom is n = 4. What is the ratio o

kvv77 [185]

Answer:

1:16

Explanation:

The ground state of an electron on the planet is n = 4 compared the ground state of an electron at n =1. For a hydrogen atom, the electron energy level is given as:

$E(n)=\frac{13.6}{n^2}\\ \\Where\ n\ is\ the\ ionization \ energy$

$E(4)=\frac{13.6}{4^2}=\frac{13.6}{16}\\ \\E(1)=\frac{13.6}{1^2}=\frac{13.6}{1}\\ \\The\ ratio\ of\ their\ ionization\ energy=\frac{E(4)}{E(1)} =\frac{\frac{13.6}{16} }{\frac{13.6}{1} } =\frac{1}{16}=1:16$

Hence the ratio of their ionization energies is 1:16

6 0

3 years ago