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3 years ago

If anybody is willing to help me with this question that'd be much appreciated!

Chemistry

1 answer:

PSYCHO15rus [73]3 years ago

5 0

Answer:

Oxidation Reduction

Explanation:

Your welcome ;) Marking me brainliest would make me be very appreciative

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Porque esta vivo un ser vivo?

Illusion [34]

Answer:

<u></u>

<u>Scientifically speaking, living things are alive because they have complex systems that allow them to be born, grow, reproduce and, when systems fail, die.</u>

Explanation:

The translation of the question is:

why is a living being alive?

<h2>Solution</h2>

Answering from a scientific point of view, not a philoshophical one, a <em>living </em>organism is differentiated from a non-living entity in that the <em>living being</em> is born, grows, has the ability to reproduce and dies.

All that is possible because the living beings posses a complex network of systems that sustain their life.

Those systems include the homeosthasis, the metabolism, the answer to external stimulus, the ability of adaptation, the development (growing) and the reproduction.

To be considered a living being the organism must count wiht all those systems.

It is important that you know that viruses are not living organisms: they are chemical molecules which do not have metabolism and do not grow.

5 0

3 years ago

Consider a 0.12 M solution of a weak polyprotic acid (H2A) with the possible values of Ka1 and Ka2 given here. Calculate the con

tatuchka [14]

The [H3O+] in step 1 is 0.0034 M while the [H3O+] in step 2 is 0.00039 M

<h3>What is the contribution of each step?</h3>

Let us set up the ICE table in each case, for K1;

H2A(aq) + H2O(l)--------> H3O^+(aq) + HA^-(aq)

I 0.12 0 0

C -x +x +x

E 0.12 - x x x

Ka1= [H3O^+] [HA^-]/[ H2A]

Ka1= x^2/ 0.12 - x

1.0×10^−4 = x^2/ 0.12 - x

1.0×10^−4(0.12 - x ) = x^2

1.2 * 10^-5 - 1.0×10^−4x = x^2

x^2 + 1.0×10^−4x - 1.2 * 10^-5 = 0

x =0.0034 M

[H3O+] = 0.0034 M

Again; [H3O+] = [HA^-] = 0.0034 M

HA^-(aq) + H20(l) -------> A^-(aq) + H3O^+

I 0.0034 0 0

C -x + x +x

E 0.0034 - x x x

Ka2= [A^-] [H3O^+]/[HA^-]

5.0×10^−5 = x^2/ 0.0034 - x

5.0×10^−5 (0.0034 - x ) = x^2

1.7 * 10^-7 - 5.0×10^−5x = x^2

x^2 + 5.0×10^−5x - 1.7 * 10^-7 = 0

x=0.00039 M

Learn more about the dissociation of a polyprotic acid:brainly.com/question/14481763

#SPJ1

7 0

1 year ago

A neutral atom of Cobalt (Co) has an atomic number of 27 and an atomic mass of 59. Therefore, Co has _________________________

stepladder [879]

Answer:

A neutral atom of Cobalt (Co) has an atomic number of 27 and an atomic mass of 59. Therefore, Co has 27 electrons, 27 protons and 32 neutrons.

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

The atomic number Co is 27 it means it has 27 protons and 27 electrons.

The mass number is sum of protons and neutrons, thus number of neutrons are

59 - 27 = 32 neutrons

3 0

3 years ago

Which of the following is a plant waste product

BaLLatris [955]

The awncer is A because the plant takes in the carbon dioxide that we breathe out and turns it into oxygen for us. That is also why deforestation is bad. Hope this awncered your problem.

8 0

3 years ago

Read 2 more answers

Is the environment considered a non controllable risk factor?

sweet [91]

I'm on the same question. I think the answer is False because you can take step to prevent environment risk factors such as applying sunscreen, avoiding violence and avoiding second-hand smoke. Hope this helps.

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3 years ago