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3 years ago

The arrows in the image show the direction in which carbon is moving Which process of the carbon cycle is indicated

1 answer:

8 0

The carbon cycle involves the circulation of carbon dioxide (CO2) from the atmosphere into plants and other living organisms; the transfer of carbon from these organisms into other temporary storage pools, living or nonliving, containing organic and inorganic carbon compounds; and the return of CO2 to the atmosphere

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A substance with a high pOH would likely have which of the following?

Anna [14]

Answer: a low $OH^-$ and low pH.

Explanation:

pH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

$pOH=-log[OH^-]$

$pOH=log\frac {1}{OH^-}$

Thus as pOH and $OH^-$ are inversely related, a solution having higher pOH will have less amount of $OH^-$ concentration. And a solution having more pOH will have less pH.

Thus a substance with a high pOH would likely have low $OH^-$ concentration and low pH.

8 0

2 years ago

Read 2 more answers

Calculate the pH after 10 mL of 1.0 M sodium hydroxide is added to 60 mL of 0.5M acetic acid.

baherus [9]

Explanation:

It is given that the total volume is (10 mL + 60 mL) = 70 mL.

Also, it is known that $M_{1}V_{1}$ = $M_{2}V_{2}$

Where, $V_{1}$ = total volume

$V_{2}$ = initial volume

Therefore, new concentration of $CH_{3}COOH$ = $\frac{M_{2}V_{2}}{V_{1}}$

= $\frac{60 \times 0.5}{70}$

= 0.43 M

New concentration of NaOH = $\frac{M_{2}V_{2}}{V_{1}}$

= $\frac{10 \times 1.0}{70}$

= 0.14 M

So, the given reaction will be as follows.

$CH_{3}COOH + OH^{-} \rightarrow CH_{3}COO^{-} + H_{2}O$

Initial: 0.43 0.14 0

Change: -0.14 -0.14 0.14

Equilibrium: 0.29 0 0.14

As it is known that value of $pK_{a}$ = 4.74

Therefore, according to Henderson-Hasselbalch equation calculate the pH as follows.

pH = $pK_{a} + log \frac{[CH_{3}COO^{-}]}{[CH_{3}COOH]}$

= $4.74 + log \frac{0.14}{0.29}$

= 4.74 + (-0.316)

= 4.42

Therefore, we can conclude that the pH of given reaction is 4.42.

6 0

2 years ago

Jet fuel has a melting point of -48° C and a boiling point of 163°C

Helen [10]

Solid since it is cold

6 0

2 years ago

Write 0.000 000 000 402 000 in scientific notation.

Rina8888 [55]

Answer:

0.000000000402000 in scientific notation is 4.02000 × 10-10

4 0

2 years ago

If atoms are so tiny how do we know they exist

Aleksandr [31]

There are three ways that scientists have proved that these sub-atomic particles exist. They are direct observation, indirect observation or inferred presence and predictions from theory or conjecture. Scientists in the 1800's were able to infer a lot about the sub-atomic world from chemistry.

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2 years ago