A sample composed only of atoms having the same atomic number is classified as(1) a compound (3) an element
(2) a solution (4) an isomer

Answers

Answer 1

Answer:

A sample composed only of atoms having the same atomic number is classified as " element".

What is element?

A pure substance made up entirely of atoms with almost the same number of protons in respective nuclei was known as an element.

What is atoms?

Atoms are "the fundamental building components of matter," according to Wikipedia. It is the lowest fundamental unit of matter which thus possesses chemical element qualities.

A sample composed only of atoms having the same atomic number is classified as " element".

Therefore, the correct answer will be option (3).

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Answer 2

Answer: A sample composed only of atoms having the same atomic number is classified as element.

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What happens to the blood which reaches the cells from the capillaries?food and CO2 pass to cells, O2 pass to blood
wastes and CO2 pass to cells, O2 pass to blood
CO2 and O2 pass to cells, wastes pass to blood
food and O2 pass to cells, CO2 and wastes pass to blood

Answers

The blood the reaches the cells from the capillaries food and O2 pass to cells, CO2 and wastes pass to blood. The rest of the choices do not answer the question above.

Answer:

food and O2 pass to cells, CO2 and wastes pass to blood.

Explanation:

Predict whether a reaction will occur when HClO and Sr(OH)2 solutions are mixed, if yes determine spectator ions in the ionic equation.

Answers

Answer:

$ClO^-\n\nSr^(2+)$

Explanation:

Hello there!

In this case, according to the reaction between hypochlorous acid and strontium hydroxide which yields stontium hypochlorite and water as a neutralization reaction:

$2HClO(aq)+Sr(OH)_2(aq)\rightarrow Sr(ClO)_2(aq)+2H_2O(l)$

Thus, since HClO is a weak acid, it is not fully ionized so the complete ionic equation turns out to be:

$2H^++2ClO^-+Sr^(2+)+2(OH)^-\rightarrow Sr^(2+)+2(ClO)^-+2H_2O(l)$

Whereas the spectator ions, which remain the same at both sides of the equation, are:

$ClO^-\n\nSr^(2+)$

Best regards!

Final answer:

A reaction occurs when HClO and Sr(OH)2 are mixed forming Sr(ClO)2 and H2O. In this reaction there are no spectator ions as all ions participate in the reaction forming new compounds.

Explanation:

When HClO (hypochlorous acid) and Sr(OH)2 (strontium hydroxide) solutions are mixed, a reaction takes place, resulting in the formation of Sr(ClO)2 and H2O. In this reaction, Sr2+ and OH- from Sr(OH)2 and H+ and ClO- from HClO are the ions that participate, therefore there are no spectator ions in the reaction. In the net ionic equation, spectator ions are the ions that remain the same in their ionic form on the both sides of the equation (reactant side and product side), thus, in this case, there are none. It's important to understand the concept of

solubility guidelines

and their use in determining reaction outcomes and recognizing

spectator ions

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Explain the relationship between chemical bonds and energy in the body.

Answers

It is a very simple explanation. When the chemical bonds are broken inside our body, the energy that gets released in our body is used to perform several important functions. This is the main relation between chemical bonds and energy in the body. I hope that this is the answer that has come to your great help.

Si un alcohol primario se calienta a una temperatura mayor de 140-C en presencia de H2SO4 concentrado, que es el catalizador, se obtiene el alqueno correspondiente más agua. Si se hace la anterior reacción con el alcohol 1 -butilico, la ecuación que representa el proceso es

Answers

Answer:

CH₃CH₂CH₂OH → CH₃CH=CH₂ + H₂O

Explanation:

La ecuación que representa la reacción del alcohol 1-butílico (también llamado como 1-butanol o n-butanol) con H₂SO₄ como catalizador a altas temperaturas es:

CH₃CH₂CH₂OH → CH₃CH=CH₂ + H₂O

Los productos son agua y buteno.

How does the solubility of a gas change with increasing temperature? It increases. It decreases. It is uniform. The temperature does not affect the solubility of a gas.

Answers

The solubility of a gas decreases with increasing temperature. This is the opposite of water whose solubility increases with increasing temperature. Gases are generally more soluble in colder temperatures. For example, oxygen is more soluble in hot water than cold water. This is why hot water can kill fish due to low oxygen.

Answer: It decreases.

Explanation: Solubility of gas in a particular liquid is the volume of gas in ml that can dissolve in unit volume of the liquid to form the saturated solution at the given temperature and under a pressure of 1 atmosphere.

Effect of temperature on solubility of gas:

Solubility of gas decreases with increase in temperature as on heating some gas is expelled out of the solution.

$Gas+solvent\rightarrow Solution+heat$

According to Le Chateliers principle , on increasing the temperature, the reaction will shift in a direction where temperature is decreasing i.e. backward direction and thus the solubility would decrease.

(HELP FAST )The model shows a molecule of silk made by a spider.