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2 years ago

Why do you see a flash of lightning before you hear the thunder during a storm?

Chemistry

1 answer:

snow_tiger [21]2 years ago

4 0

Answer:

the speed of light travels much faster than the speed of sound.

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The concentration of potassium is higher in red blood cells than in the surrounding blood plasma. This higher concentration is m

lana [24]

Answer:

active transport

Explanation:

Active transport -

It refers to the movement of the molecules from a region of lower concentration towards a region of higher concentration via a membrane , is referred to as active transport.

The process of active transport need to have some cellular energy .

Hence,

The concentration of potassium is maintained in the red blood cells via the process of active transport.

3 0

3 years ago

Which items are directly related to radioactive decay

uranmaximum [27]

E=mc^2 and mass defect

3 0

3 years ago

Write balance complete molecular equation, ionic equation, and net ionic equations for the reactions that occur when each of the

AveGali [126]

<u>Answer:</u> The complete molecular, ionic, and net ionic equations are given below. The spectator ions are sodium and nitrate ions.

<u>Explanation:</u>

The ionic equation is defined as the equation in which all the substances that are strong electrolytes present in an aqueous state and are represented in the form of ions.

The net ionic equation is defined as the equations in which spectator ions are not included.

Spectator ions are the ones that are present equally on the reactant and product sides. They do not participate in the reaction.

The balanced molecular equation for the reaction of lead (II) nitrate and sodium sulfide follows:

$Pb(NO_3)_2(aq)+Na_2S(aq)\rightarrow PbS(s)+2NaNO_3(s)$

The ionic equation follows:

$Pb^{2+}(aq)+2NO_3^-(aq)+2Na^+(aq)+S^{2-}(aq)\rightarrow PbS(s)+2Na^+(aq)+2NO_3^-(aq)$

As sodium and nitrate ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

$Pb^{2+}(aq)+S^{2-}(aq)\rightarrow PbS(s)$

3 0

3 years ago

Two elements with the same number of protons but a different number of 2 points

notsponge [240]

Answer: isotopes

Explanation: I remember this from when I took honors chemistry, they are know as isotopes.

3 0

3 years ago

What 4 elements did people originally think made up everything?

ioda

Earth, Air, Water, and Fire

4 0

3 years ago

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