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3 years ago

PLEASE HELP MEEE I WILL MARK BRAINLIST FOR THIS ITS SUPER SIMPLE....BUT U MUST TYPE EVERYTHING

Chemistry

2 answers:

OlgaM077 [116]3 years ago

7 0

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pychu [463]3 years ago

6 0

Population Changes

Change is inevitable in nature.

Ecosystems have to cope with sudden changes like hurricanes and long term changes like ice ages.

Healthy Ecosystems will withstand the stress caused by change. Populations will recover or adapt to a new climate.

Population Changes

Stressed ecosystems do not handle change well.

They are already fragile or out of balance. They react with population spikes (boom) and population crashes (bust)

Population spike (boom)- Increase in population happens quickly.

Population crash (bust)- Decrease in population happens quickly

Sometimes a stressed ecosystem will not recover from change.

Population Effects Ecosystems

If a change affects one population in an ecosystem, the change will be felt throughout the system over time.

When one population of organisms increases or decreases, other populations will be affected because all living things are interrelated.

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The pH of an acid solution is 5.82. Calculate the Ka for the monoprotic acid. The initial acid concentration is 0.010 M.

blagie [28]

Answer:

The answer is

<h3> $Ka = 2.29 \times {10}^{ - 14} moldm^{ - 3}$ </h3>

Explanation:

The Ka of an acid when given the pH and concentration can be found by

where

c is the concentration of the acid

From the question

pH = 5.82

c = 0.010 M

Substitute the values into the above formula and solve for Ka

We have

Multiply through by - 2

Find antilog of both sides

We have the final answer as

<h3> $Ka = 2.29 \times {10}^{ - 14} moldm^{ - 3}$ </h3>

Hope this helps you

8 0

3 years ago

What is the [H3O+] if the [OH-] is 1 x 10 -8?

Tanzania [10]

From the calculation, the concentration of the oxonium ions is 1 * 10^-6 M

<h3>What is concentration?</h3>

The term concentration refers to the amount of substances present in the solution. There are several units that can be used to show the concertation of a substances such as moles/liter, gram per liter, parts per billion, parts per billion, percentage etc.

Now we know that water is composed of the hydrogen and the hydroxide ions and the product of the both is generally known as the ion product of water and have a value of 1 * 10^-14.

If that be the case, we are in order to write the expression;

[H3O+] [OH-] = 1 * 10^-14

[H3O+] = 1 * 10^-14/ [OH-]

[H3O+] = 1 * 10^-14/ 1 x 10^ -8

[H3O+] = 1 * 10^-6 M

Learn more about concentration:brainly.com/question/10725862

#SPJ1

5 0

2 years ago

Which is a chemical property of mercury? (2 points)

nevsk [136]

D) reacts with oxygen
All other are physical properties.

4 0

3 years ago

Read 2 more answers

Four students all do the same experiment for the science fair. They test reaction times for pushing a button when a specific col

emmasim [6.3K]

Sorry, Cant really tell how to differentiate the students and trial times

3 0

3 years ago

Which statement is true?

docker41 [41]

I am pretty sure that the statement which is true is A. a molecule having a covalent bond can be ionic. I choose this option because you usually ca see how electons of polyatomic ions are being covalenr and gain or loose ionic electrons in order to accomplish the octet.<span>

</span>Do hope you find it helpful! Regards.

7 0

3 years ago