How many protons does this atom have?:____

How many neutrons does this atom have?:____

How many electrons does this atom have?:____

Answer: The equation Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O represents the correct net ionic equation for the reaction between  [tex]Ca(OH)_{2}[/tex] and [tex]H_{2}SO_{4}[/tex].

Explanation:

An ionic equation is defined as the equation where both reactants and products are present in the form of ions.

For example, ionic equation between [tex]Ca(OH)_{2}[/tex] and [tex]H_{2}SO_{4}[/tex] is as follows.

[tex]Ca^{2+} + 2OH^{-} + 2H^{+} + SO^{2-}_{4} \rightarrow Ca^{2+} + SO^{2-}_{4} + 2HOH[/tex]

Cancelling the spectator ions then net ionic equation will be as follows.

[tex]2H^{+} + 2OH^{-} \rightarrow H_{2}O[/tex]

Thus, we can conclude that the equation Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O represents the correct net ionic equation for the reaction between  [tex]Ca(OH)_{2}[/tex] and [tex]H_{2}SO_{4}[/tex].

Answer: In copper (II) sulfate pentahydrate, only 1 sulfur atom is present.

Explanation:

The chemical formula of the copper (II) sulfate pentahydrate is [tex]CuSO_4.5H_2O[/tex]

In the given chemical formula:

Number of copper atoms = 1

Number of sulfur atoms = 1

Number of oxygen atoms = 9

Number of hydrogen atoms = 10

Hence, in copper (II) sulfate pentahydrate, only 1 sulfur atom is present.

Answer:

Actividades humanas y vida marina.

Explicación:

La contaminación ocurre por actividades humanas que se considera una alteración en el medio ambiente. Esta contaminación provocada por el ser humano puede destruir la vegetación, el suelo y afectar negativamente a la vida marina. Esta destrucción que se produce en el medio ambiente es el resultado de la quema de combustibles fósiles que liberan gases industriales nocivos en la atmósfera por lo que si queremos proteger nuestro medio ambiente de mayores daños tenemos que reducir las actividades que provocan la liberación de gases nocivos en la atmósfera. .

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, the element X with the atomic number of 18 is Argon (Ar) while the next element (element Y) in the periodic table, with atomic number 19, is potassium (K).

Element X is found in the group zero (also called group 18 and elements found therewith are referred to as noble gases) of the periodic table while element Y is found in group 1 (elements found here are referred to as alkali metals).

Element X has a completely filled outermost shell while element Y has one electron in its outermost shell.

Element X is a metal while element Y is a nonmetal.

Answer:b

Explanation:

Answer:

5240

Explanation:

I'm not sure tho sorry

Answer: The percentage yield of [tex]CO_2[/tex] is 90.26%.

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of [tex]CaCO_3[/tex] = 80 g

Molar mass of [tex]CaCO_3[/tex] = 100 g/mol

Plugging values in equation 1:

[tex]\text{Moles of }CaCO_3=\frac{80g}{100g/mol}=0.8 mol[/tex]

For the given chemical equation:

[tex]CaCO_3\rightarow CaO+CO_2[/tex]

By the stoichiometry of the reaction:

If 1 mole of [tex]CaCO_3[/tex] produces 1 mole of [tex]CO_2[/tex]

So, 0.8 moles of [tex]CaCO_3[/tex] will produce = [tex]\frac{1}{1}\times 0.8=0.8mol[/tex] of [tex]CO_2[/tex]

Molar mass of [tex]CO_2[/tex] = 44 g/mol

Plugging values in equation 1:

[tex]\text{Mass of }CO_2=(0.8mol\times 44g/mol)=35.2g[/tex]

The percent yield of a reaction is calculated by using an equation:

[tex]\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100[/tex] ......(2)

Given values:

Actual value of [tex]CO_2[/tex] = 35.2 g

Theoretical value of [tex]H_2CO_3[/tex] = 39 g

Plugging values in equation 2:

[tex]\% \text{yield of }CO_2=\frac{35.2g}{39g}\times 100\\\\\% \text{yield of }CO_2=90.26\%[/tex]

Hence, the percentage yield of [tex]CO_2[/tex] is 90.26%.

Answer: plastic conduces heat

Explanation:Plastics are excellent insulators, meaning they can efficiently trap heat — a quality that can be an advantage in something like a coffee cup sleeve. ... The new polymers, which are lightweight and flexible, can conduct 10 times as much heat as most commercially used polymers

Answer:

noo

Explanation:

its basic

....................

Answer: acidic

Explanation:

Answer:

i think they would be all the same

Explanation:

they sound like sugars

Answer:

The independent variable is the cause. Its value is independent of other variables in your study.

The dependent variable is the effect. Its value depends on changes in the independent variable.

Ex: The ice cube melts on the stove.

Dependent variable: Ice Cube

Independent variable: heat of stove

Answer:

In an experiment, the IV(independent variable) is a variable that is changed to see how it affects something else, and the DV (dependent variable)is a variable that is being measured/observed.

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Answer:

2 CH3COOH + Ba(OH)2 --> Ba(C2H3O2)2 + 2H2O

To make it less clustered, you can use Ac for C2H3O2.

2 HAc + Ba(OH)2 --> Ba(Ac)2 + 2H2O

The acetic acid reacts with the base barium hydroxide to form the salt barium acetate and water.

Explanation:

final answer. C

Answer: The mass of water required is 18.52 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of magnesium hydroxide = 30.0 g

Molar mass of magnesium hydroxide = 58.32 g/mol

Plugging values in equation 1:

[tex]\text{Moles of magnesium hydroxide}=\frac{30.0g}{58.32g/mol}=0.5144 mol[/tex]

The given chemical equation follows:

[tex]Mg(OH)_2+2HCl\rightarrow MgCl_2+2H_2O[/tex]

By the stoichiometry of the reaction:

If 1 mole of magnesium hydroxide produces 2 moles of water

So, 0.5144 moles of magnesium hydroxide will react with = [tex]\frac{2}{1}\times 0.5144=1.0288mol[/tex] of water

Molar mass of water = 18 g/mol

Plugging values in equation 1:

[tex]\text{Mass of water}=(1.0288mol\times 18g/mol)=18.52g[/tex]

Hence, the mass of water required is 18.52 g

Answer:

74

Explanation:

The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products

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The total mass of the products will also be 74 g

From the above law, we understood that in any chemical reaction, the total mass of reactants must be equal to the total mass of products i.e

From the question given above,

Total mass of reactants = 74 g

Total mass of reactants = Total mass of products

74 g = Total mass of products

Thus,

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Answer:

18.89 g of Al₂O₃.

Explanation:

The balanced equation for the reaction is given below:

4Al + 3O₂ —> 2Al₂O₃

Next, we shall determine the masses of Al and O₂ that reacted and the mass of Al₂O₃ produced from the balanced equation. This can be obtained as follow:

Molar mass of Al = 27 g/mol

Mass of Al from the balanced equation = 4 × 27 = 108 g

Molar mass of O₂ = 16 × 2 = 32 g/mol

Mass of O₂ from the balanced = 3 × 32

= 96 g

Molar mass of Al₂O₃ = (27×2) + (16×3)

= 54 + 48

= 102 g/mol

Mass of Al₂O₃ from the balanced equation = 2 × 102 = 204 g

SUMMARY:

From the balanced equation above,

108 g of Al reacted with 96 g of O₂ to produce 204 g of Al₂O₃.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above,

108 g of Al reacted with 96 g of O₂.

Therefore, 10 g of Al will react with

= (10 × 96)/108 = 8.89 g of O₂.

From the calculation made above, we can see clearly that only 8.89 g out of 19 g of O₂ given, reacted completely with 10 g of Al.

Therefore, Al is the limiting reactant and O₂ is the excess reactant.

Finally, we shall determine the mass of aluminium oxide, Al₂O₃, produced from the reaction.

NOTE: in this case, the limiting reactant will be used because it will give the maximum mass of the aluminium oxide, Al₂O₃ as all of it is consumed in the reaction.

Al is the limiting reactant and the mass of aluminium oxide, Al₂O₃ produced can be obtained as follow:

From the balanced equation above,

108 g of Al reacted to produce 204 g of Al₂O₃.

Therefore, 10 g of Al will react to produce = (10 × 204)/108 = 18.89 g of Al₂O₃.

Thus, 18.89 g of Al₂O₃ were obtained from the reaction.

Answer:

D

the angles wich light is coming into the medium are not the same for all wavelengths (colors, at least in the visible spectrum). same for outgoing light.

the same it true for any transparent barrier between two different materials, like air and water.

A prism separates the wavelengths contained in a beam of light. Hence Option (D) is correct.

A glass or other transparent object in the form of a prism, especially one that is triangular with refracting surfaces at an acute angle with each other and that separates white light into a spectrum of colours.

A prism is an optical component that serves one of two major functions: it disperses light, or it modifies the direction (and sometimes polarization) of light.

In some cases, a prism has more than one function. Prisms are usually transparent to the region of the electromagnetic spectrum being observed.

The prisms are employed to produce polarized light for optical instruments such as microscopes and polarimeters.

Mirrors are commonly utilized to fold the light beam through an optical system.

Therefore, A prism separates the wavelengths contained in a beam of light. Hence Option (D) is correct.

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Answer:

keep the soil wet

Explanation: if the song wet it will not cause as much dust storms

Answer:

Nuclear fission power plants have the disadvantage of generating unstable nuclei; some of these are radioactive for millions of years. Fusion on the other hand does not create any long-lived radioactive nuclear waste. A fusion reactor produces helium, which is an inert gas.

Answer:

i think this is it

Explanation:

particles and gases

REACTION TYPE:

Single displacement/Oxidation-reduction

(Hope this helped UwU)

Answer:

Synthesis reaction is the answer

Answer:

Explanation:

Energy needed = mass * temperature difference * specific heat

= 4.37 * (27.5-25) * 0.24

= 4.37 * 2.5 * 0.24

= 2.622J

Answer:

Explanation:

warm up 2.5C

mass 4.37

specific heat 0.24

energy = 2.5*4.37*0.24

= 2.6J

Answer:

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Answer:

5555555555555555555555555555555555555555555555555555555

Explanation:

5555555555555555555555555555555555555555555555555555555

Answer:

B

Explanation:

BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Explanation:

Fe- reducing agent (since it is oxidized to fe203)

v203- oxidizing agent(since it is reduced)

In the given reaction, Fe is the reducing agent and V is the oxidizing agent.

An atom or compound that loses its electrons to other substances in a reduction-oxidation reaction and gets oxidized to a higher valency state is called a reducing agent.

A reducing agent can be defined as one of the reactants of a redox reaction that reduces the other reactant by giving its electrons to the reactant. If the reducing agent can not give away its electrons to others in a reaction, then the reduction reaction cannot occur.

Given, the following chemical reaction:

2Fe + 3V₂O₃ → Fe₂O₃ + 6VO​

The V₂O₃ oxidation state of V:

2 x + 3(-2) = 0

2x = 6

x = + 3

The Fe₂O₃ oxidation state of Fe:

2 y + 3 (-2) = 0

2y = 6

y = + 3

The V acts as an oxidizing agent because it accepts one electron to change the oxidation state from +3 to +2.

Fe acts as a reducing agent because it gives out its electrons to change the oxidation state from 0 to +3.

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I think there are a bond??

Answer:

it is covalent

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The question is: To neutralize 20ml of 0.1M HCl solution, 10ml of NaOH solution of concentration x mol/l is required. What is the value of x?

Answer: The value of x is 0.2 M.

Explanation:

Given: [tex]V_{1}[/tex] = 20 mL,   [tex]M_{1}[/tex] = 0.1 M

[tex]V_{2}[/tex] = 10 mL,        [tex]M_{2}[/tex] = x

Formula used is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\0.1 M \times 20 mL = x \times 10 mL\\x = 0.2 M[/tex]

Thus, we can conclude that the value of x is 0.2 M.