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4 years ago

Which of the following statements is true?

1 answer:

4 0

Organs are made up of cells and tissues, because cells make up tissues, tissues make up organs, and organs make up organ systems. Hope this helps !

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The reaction 2KBr(s) →+ Br2(l) + 2K(s) is a <br>Decomposition reaction

klasskru [66]

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3 years ago

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must

alina1380 [7]

Answer:

The statement which best explains the change that must happen at the molecular level is below:

Explanation:

The molecules move more slowly and their average kinetic energy decreases

7 0

3 years ago

Read 2 more answers

Can a particle be a single atom? Explain...

pogonyaev

no, it contains 3 basic particles. (protons, electrons, neutrons)

hope this helped

5 0

3 years ago

4P + 502 → 2P20x

Thepotemich [5.8K]

Answer:

Explanation:

According to the Law of Conservation of Matter, the mass of the products in a chemical reaction must equal the mass of the reactants.

5O2 = 10 Oxygen atoms

In 2POx there must be 10 Oxygen atoms too. => x = 5

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Hope it can help you.

6 0

4 years ago

Hydrogen sulfate reacts with water to produce sulfate ions and hydronium ions: hso4−+h2o⇌so42−+h3o+ identify the conjugate acid-

Angelina_Jolie [31]

The generic equation for a reaction between an acid and water is

$HX_{(aq)} + H_{2}O_{(aq)} --> X_{(aq)}^{-} + H_{3}O_{(aq)}^+$

When an acid "reacts" with water, water acts as the base that accepts the proton (H+) from the acid. The remaining ion that is formed after the acid has donated its proton is called the conjugate base ( $X^-$ ), and the conjugate acid-base pair is $HX$ - $X^-$ .

Hydrogen sulfate ( $HSO_{4}^-$ ) is an ion from sulfuric acid. It is still an acid in itself and can "react" with water (( $H_{2}O$ ) to form the sulfate ( $SO_{4}^2-$ ) and hydronium ( $H_{3}O^+$ )ions.

$HSO_{4(aq)}^{-} + H_{2}O_{(aq)} --> SO_{4(aq)}^{2-} + H_{3}O_{(aq)}^+$

Based on the previous discussion, $SO_{4(aq)}^2-$ is identified to be the conjugate of the acid $HSO_{4(aq)}^-$ . Thus, the conjugate acid-base pair is $HSO_{4(aq)}^{-} - SO_{4(aq)}^{2-}$ .

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3 years ago