How many protons and neutrons does a silicon si atom have and hwere are each of there subatomic particles located how many electrons does a silicon atom have?

Answer:

answer is Shrubland

Final answer:

To calculate the grams of ethyl butyrate synthesized, use the molar ratios from the balanced chemical equation. Given 7.55 g of butanoic acid, the number of moles of ethyl butyrate synthesized is 0.0857 mol. Therefore, the grams of ethyl butyrate synthesized would be 9.96 g.

Explanation:

To calculate the grams of ethyl butyrate synthesized, we need to use the molar ratios from the balanced chemical equation. The balanced equation is: C4H8O2 + C2H5OH → C6H12O2 + H2O. The molar mass of butanoic acid (C4H8O2) is 88.11 g/mol and the molar mass of ethyl butyrate (C6H12O2) is 116.16 g/mol.

First, calculate the number of moles of butanoic acid:
7.55 g C4H8O2 * (1 mol C4H8O2 / 88.11 g C4H8O2) = 0.0857 mol C4H8O2

From the balanced equation, we can see that the mole ratio between butanoic acid and ethyl butyrate is 1:1. Therefore, the number of moles of ethyl butyrate synthesized is also 0.0857 mol.

Finally, calculate the grams of ethyl butyrate:
0.0857 mol C6H12O2 * (116.16 g C6H12O2 / 1 mol C6H12O2) = 9.96 g C6H12O2

7.55 g of butanoic acid would produce 9.95 g of ethyl butyrate, assuming a 100% yield.

To determine how many grams of ethyl butyrate would be synthesized from 7.55 g of butanoic acid, follow these steps:

Write the balanced chemical equation:

C₃H₇COOH + C₂H₅OH → C₃H₇COOC₂H₅ + H₂O

Calculate the molar mass:

Find the moles of butanoic acid:

Determine the moles of ethyl butyrate:

Calculate the mass of ethyl butyrate:

Check attached for the table. 

The explanation behind the table:

Solid – has definite shape and volume because if you hold any solid and put in anywhere it will not change.

Liquid – has definite volume and indefinite shape because the liquid take the shape of its container but with the same volume.

Gas – has indefinite shape and volume because the gas takes the shape and volume at its container.

The three common states of matter - solid, liquid, and gas - can be described in terms of their shape, volume, and compressibility.

The three common states of matter - solid, liquid, and gas - can be described in terms of their shape, volume, and compressibility.

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The electronic configuration structure of an oxygen atom is 1s² 2s²2p⁴ (Option A)

This is the arrangement of electrons in the atomic orbitals of an element.

Oxygen has an atomic number of 8. Thus , we can write the electronic configuration using the spdf orbital notation as follows

NOTE:

The electronic configuration of oxygen atom can be written as follow:

O (8) => 1s² 2s²2p⁴

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The reactions that occur by mixing aqueous solutions of barium sulfide and sulfuric acid are

[tex]\boxed{{\text{Precipitation and gas evolution reactions}}}[/tex]

Further Explanation:

Precipitation reaction:

It is the type of reaction in which an insoluble salt is formed by the combination of two solutions containing soluble salts. That insoluble salt is known as precipitate and therefore such reactions are named precipitation reactions. An example of precipitation reaction is,

[tex]{\text{AgN}}{{\text{O}}_3}\left( {aq}\right)+{\text{KBr}}\left( {aq}\right)\to {\text{AgBr}}\left( s \right)+{\text{KN}}{{\text{O}}_3}\left( {aq}\right)[/tex]

Here, AgBr is a precipitate.

Neutralization reaction:

It is the reaction that occurs between an acid and a base in order to form salt and water. It is named so as it neutralizes the excess amount of hydrogen or hydroxide ions present in the solution. It is used to decrease the acidity in the stomach, wastewater treatment, antacid tablets and to control the pH of soil. An example of neutralization reaction is,

[tex]{\text{HCl}}+{\text{NaOH}}\to{\text{NaCl}}+{{\text{H}}_2}{\text{O}}[/tex]

Gas evolution reaction:

It is the type of chemical reaction in which one of the products is a gas. These reactions are often carried out in a fume chamber if poisonous gases are produced. An example of gas evolution reaction is,

[tex]{\text{Zn}}+2{\text{HCl}}\to{\text{ZnC}}{{\text{l}}_2}+{{\text{H}}_2}[/tex]

Here, [tex]{{\text{H}}_2}[/tex] is evolved so it is a gas evolution reaction.

The solubility rules to determine the solubility of the compound are as follows:

1. The common compounds of group 1A are soluble.

2. All the common compounds of ammonium ion and all acetates, chlorides, nitrates, bromides, iodides, and perchlorates are soluble in nature. Only the chlorides, bromides, and iodides of  [tex]{\text{A}}{{\text{g}}^ + }[/tex] , [tex]{\text{P}}{{\text{b}}^{2 + }}[/tex] , [tex]{\text{C}}{{\text{u}}^ + }[/tex] and [tex]{\text{Hg}}_2^{2 + }[/tex] are not soluble.

3. All common fluorides, except for [tex]{\text{Pb}}{{\text{F}}_{\text{2}}}[/tex] and group 2A fluorides, are soluble. Moreover, sulfates except [tex]{\text{CaS}}{{\text{O}}_{\text{4}}}[/tex] , [tex]{\text{SrS}}{{\text{O}}_{\text{4}}}[/tex] , [tex]{\text{BaS}}{{\text{O}}_{\text{4}}}[/tex] , [tex]{\text{A}}{{\text{g}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}[/tex] and [tex]{\text{PbS}}{{\text{O}}_{\text{4}}}[/tex] are soluble.

4. All common metal hydroxides except [tex]{\text{Ca}}{\left( {{\text{OH}}}\right)_{\text{2}}}[/tex] , [tex]{\text{Sr}}{\left( {{\text{OH}}} \right)_{\text{2}}}[/tex] , [tex]{\text{Ba}}{\left( {{\text{OH}}} \right)_{\text{2}}}[/tex]  and hydroxides of group 1A, are insoluble.

5. All carbonates and phosphates, except those formed by group 1A and ammonium ion, are insoluble.

6. All sulfides, except those formed by group 1A, 2A, and ammonium ion are insoluble.

7. Salts that contain [tex]{\text{C}}{{\text{l}}^ - }[/tex] , [tex]{\text{B}}{{\text{r}}^ - }[/tex] or [tex]{{\text{I}}^ - }[/tex] are usually soluble except for the halide salts of [tex]{\text{A}}{{\text{g}}^ + }[/tex] , [tex]{\text{P}}{{\text{b}}^{2 + }}[/tex] and [tex]{\left({{\text{H}}{{\text{g}}_2}}\right)^{{\text{2 + }}}}[/tex].

8. The chlorides, bromides, and iodides of all the metals are soluble in water, except for silver, lead, and mercury (II). Mercury (II) iodide is water insoluble. Lead halides are soluble in hot water.

9. The perchlorates of group 1A and group 2A are soluble in nature.

10. Almost all the sulfides of transition metals are highly insoluble. These include CdS, FeS, ZnS, and [tex]{\text{A}}{{\text{g}}_2}{\text{S}}[/tex]. The sulfides of arsenic, antimony, bismuth, and lead are also insoluble.

11. All the acetates and chlorates are soluble in nature.

The reaction between barium sulfide and sulfuric acid is as follows:

[tex]{\text{BaS}}\left({aq} \right)+{{\text{H}}_2}{\text{S}}{{\text{O}}_4}\left( {aq}\right) \to {\text{BaS}}{{\text{O}}_4}\left( s \right)+{{\text{H}}_2}{\text{S}}\left( g \right)[/tex]

According to the solubility rules, [tex]{\text{BaS}}{{\text{O}}_4}[/tex] is an insoluble salt. So [tex]{\text{BaS}}{{\text{O}}_4}[/tex] will form precipitate in the above reaction and therefore this is a precipitation reaction.

Also, [tex]{{\text{H}}_2}{\text{S}}[/tex] is evolved during this reaction, so it is also a gas evolution reaction.

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Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Chemical reaction and equation

Keywords: precipitate, soluble, insoluble, solubility rules, solubility, precipitation reaction, BaSO4, H2S, BaS, H2SO4, neutralization reaction, gas evolution reaction.

The correct option is D. The kind of reaction that occurs when you mix aqueous solutions of barium sulfide and sulfuric acid is precipitation and gas evolution.

Let’s break down the reaction between barium sulfide (BaS) and sulfuric acid (H₂SO₄) in more detail.

Reactants:

1. Barium Sulfide (BaS): A soluble ionic compound that dissociates in water to form barium ions (Ba²⁺) and sulfide ions (S²⁻).

2. Sulfuric Acid (H₂SO₄): A strong acid that dissociates in water to form hydrogen ions (H⁺) and sulfate ions (SO₄²⁻).

Reaction:

When these two aqueous solutions are mixed, a double displacement reaction occurs. This type of reaction involves the exchange of ions between the two reactants. The specific steps are:

1. Ion Exchange:

  - The barium ions (Ba²⁺) from barium sulfide react with the sulfate ions (SO₄²⁻) from sulfuric acid.

  - The hydrogen ions (H⁺) from sulfuric acid react with the sulfide ions (S²⁻) from barium sulfide.

2. Formation of Products:

  - Barium Sulfate (BaSO₄): This compound is formed by the combination of Ba²⁺ and SO₄²⁻ ions. Barium sulfate is highly insoluble in water, so it precipitates out as a solid.

  - Hydrogen Sulfide (H₂S): This compound is formed by the combination of H⁺ and S²⁻ ions. Hydrogen sulfide is a gas and will bubble out of the solution.

Chemical Equation:

The overall balanced chemical equation for the reaction is:

[tex]\[ BaS (aq) + H_2SO_4 (aq) \rightarrow BaSO_4 (s) + H_2S (g) \][/tex]

Observations:

- Precipitation: The formation of a solid barium sulfate (BaSO₄) can be observed as a white precipitate in the solution.

- Gas Evolution: The formation of hydrogen sulfide (H₂S) can be observed as bubbles of gas escaping from the solution. Hydrogen sulfide has a characteristic smell of rotten eggs.

Explanation of Answer:

Given the reaction details, it is clear that the process involves:

- Precipitation: The formation of an insoluble solid (barium sulfate).

- Gas Evolution: The release of a gas (hydrogen sulfide).

The complete question is-

What kind of reaction occurs when you mix aqueous solutions of barium sulfide and sulfuric acid?

A. Neutralization

B. Gas evolution

C. Precipitation

D. Precipitation and gas evolution

When you are mixing reagents in a separatory funnel it is important to vent it normally and do so in a method so that is it is not venting towards anybody. Also be certain to take out the stopper when draining the lower layer. If you do not take out the stopper, the pressure will not be correct, and the liquid will not pour out.

Final answer:

Proper precautions when mixing reagents in a separatory funnel or centrifuge tube include cushioning and securing equipment, careful pouring, and using the centrifuge correctly.

Explanation:

Precautions to take when mixing reagents in a separatory funnel or a centrifuge tube: When using a separatory funnel, ensure it is cushioned and secured, always pour liquids carefully to prevent spills, and vent pressure if needed. When using a centrifuge tube, cap it tightly, gently mix contents, and centrifuge to bring liquids to the bottom before removing. Be cautious with handling hot liquids, ensure equipment is properly set up, and avoid contamination by following proper lab techniques.

ATP adds energy to a chemical reaction via exchange, of which is considered a type of reaction. This is a process that ATP is adding energy in exchange of having to produce a reaction of which is chemical reaction to produce its function or mechanism in the body.

Answer:

Exchange reaction.

Explanation:

ATP (adenosine triphosphate) is known as the energy currency of the cell. The ATP is used in the body during various metabolic reactions and during the transport of molecules against the concentration gradient.

The ATP molecule undergoes the chemical reaction and the exchange reaction. The phosphate molecule is exchanged during the reaction that makes the ATP active and used to add energy in the cell system of the body.

Thus, the example is exchange reaction.

The density of the iron weightlifting plate is approximately 7.85 g/cm³, which aligns with the reference density of iron.

The density of an object is defined as its mass per unit volume. The question asks for the density of the iron plate, which can be calculated using the formula density = mass/volume.

To find the density of the 15.0 kg iron weightlifting plate with a volume of 1910 cm³, first convert the mass from kilograms to grams since the volume is given in cubic centimeters and density is often expressed in g/cm³. There are 1000 grams in a kilogram, so the mass of the plate is 15.0 kg × 1000 g/kg = 15000 g.

Now, density can be calculated as follows:
density = mass/volume
= 15000 g / 1910 cm³
≈ 7.85 g/cm³

This value is very close to the standard reference density for iron, which is around 7.86 g/cm³ to 7.9 g/cm³ under standard conditions.

The surface metabolism model evokes mineral catalysts. Surface metabolism model dissolved gases in contact with minerals lining the walls of the deep-sea hydrothermal vents and formed more complex, organic molecules while Prebiotic soup model is molecules in atmosphere or from meteorites condensed in the ocean which led to the formation of more complex molecules.

Uranium-235 has an atomic number of 92, indicating it has 92 protons. The mass number of 235 means it has 143 neutrons (235 - 92 = 143). Thus, uranium-235 contains 92 protons and 143 neutrons.

Uranium-235 is a commonly known isotope used in nuclear fission. To determine the number of protons and neutrons in uranium-235, we use its atomic number and mass number.

To find the number of neutrons, we subtract the atomic number from the mass number:

Number of neutrons = Mass number - atomic number
Number of neutrons = 235 - 92 = 143

In uranium-235, there are 92 protons and 143 neutrons.

Answer : The speed of car in meters per second is 24.597 m/s

Explanation :

The conversion used from miles to kilometer is:

1 mile = 1.61 km

The conversion used from kilometer to meter is:

1 km = 1000 m

So, [tex]1mile=\frac{1.61km}\times \frac{1000m}{1km}=1610m[/tex]

The conversion used from hour to second is:

1 hr = 3600 s

So, [tex]1mile/hr=\frac{1610}{3600}m/s[/tex]

As we are given the speed 55.0 miles per hour. Now we have to determine the speed in meter per second.

As, [tex]1mile/hr=\frac{1610}{3600}m/s[/tex]

So, [tex]55.0mile/hr=\frac{55.0mile/hr}{1mile/hr}\times \frac{1610}{3600}m/s=24.597m/s[/tex]

Therefore, the speed of car in meters per second is 24.597 m/s

Answer:

It is a mixture.

Explanation:

A compound is a pure substance which cannot be separated into its constituent by physical methods.

A mixture is a substance which can be separated into its constituent by physical methods.

Gasoline consists of different organic liquids.

These organic liquids can be separated by physical means like fractional distillation.

Thus gasoline will be a mixture. More specifically it is a homogeneous mixture.