Desiré was investigating a chemical reaction.When she heated it up, she found that sulfuric acid changed into water. She made the following atomic-scale model to show what she thinks happened. Do you think this is a complete model of what happened during the chemical reaction?

By using given equation 0.9 moles of CH₄ are required to produce 3.6 moles of HCl.

The transformation of one or more reactants, also known as reactants, into one or more new products, also known as products, occurs during a chemical reaction.

Chemical reactions turn reactants into products by involving reactants in the process. As an illustration, when we breathe, oxygen is inhaled, and upon coming into contact with glucose, it reacts to create carbon dioxide, water, and energy.

Given chemical reaction:

CH₄ + 2 Cl₂ → 4 HCl + C

1 mole of CH₄ gives 4 moles of HCl

x moles of CH₄ gives 3.6 moles

x moles of CH₄ = 3.6/4

x moles of CH₄ = 0.9moles.

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Answer:

During photosynthesis, plants absorb carbon dioxide and sunlight to create fuel, glucose and other sugars for building plant structures. This process forms the foundation of the fast carbon cycle.In all four processes, the carbon dioxide released in the reaction usually ends up in the atmosphere.

Answer:

During photosynthesis, plants also absorb carbon dioxide and sunlight to create fuel, glucose, and other sugars for building plant structures. This process forms the foundation of the fast carbon cycle.

Explanation:

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Answer:

The Alleles gene shows up even when inherited only from one parent

Explanation:

The two alleles in a gene pair are inherited, one from each parent. Alleles interact with each other in different ways. These are called inheritance patterns.

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Answer:

answer is D. safety shower, in case a chemical is spilled on the student’s body on edge 2020

Explanation:

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It is important for student's to know the location of safety shower, in case a chemical is spilled on the student’s body which can be avoided by wearing proper personal protective equipments.

Personal protective equipment is a protective clothing which is worn to protect the wearer's body from hazard or injury.The hazards which can be addressed by the use of personal protective equipment are physical,chemical and bio hazards.

It imposes a barrier between the user and the working environment.The main purpose of personal protective equipment is to reduce exposure of employees to the hazards.

It has a limitation that it does not eliminate the hazard and may lead to harm to the employee if the equipment is damaged.

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electrons

Revolving around the nucleus at a distance is a cloud of particles called electrons. Each electron has a negative charge.

Answer:

Electron

Explanation:

Because electrons are negatively charge particles

[tex] \huge\hookrightarrow \mathtt{ Answer }[/tex]

The reaction in which one element is oxidized and other element is reduced is known as :

[tex] \huge \boxed{ \mathbb{redox}}[/tex]

Answer:

[tex]\huge \mathcal{Answer}࿐Answer࿐[/tex]

[tex]\huge \mathcal{ redox} \:[/tex]

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Answer:

powdered sugar

Explanation:

The higher is the exposed area of sugar, the faster is the dissolution process. Thus, to choose between the different types of sugar, we have to look at the volume occupied by the sugar.

In sugar cubes, the particles of sugar as compacted in a cube, so the particles inside the cube are not exposed to the solvent (water). So, sugar cubes have the slowest dissolution process. Then, in granulated sugar, the particles have more area exposed, so this type of sugar will dissolve faster than sugar cubes. Finally, powdered sugar is composed of tiny particles with more are exposed, so powdered sugar has the fastest dissolution process.

Therefore, powdered sugar will dissolve the fastest.

Answer: Chemical changes cause a substance to change into an entirely substance with a new chemical formula.

Physical changes only change the appearance of a substance, not its chemical composition.

Chemical changes are also known as chemical reactions.

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Explanation:

conduction because it has succession

As a result, 6.022 x 10 23 molecules of water weigh 18.02 g. A mole of sodium chloride (6.02 x 1023 formulas) weighs 58.44 g.

A substance's mole is equivalent to 6.022 x 1023 of that material (such as atoms, molecules, or ions). One mole, or 6.022 x 1023 molecules, is equal to one gram's worth of any given substance's molecular mass. Thus, a mole of oxygen (O2) weighs 32 kilos and has a molecular mass of 6.022 1023.

12 grams of pure carbon-12 weigh exactly one mole, or 6.022 x 1023 atoms, making one mole equivalent to 12 grams of pure carbon-12. • Avogadro's Number refers to the quantity of particles contained in one mole (6.0221421x1023).

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All of the elements in group 18 are relatively un-reactive whereas those in group 17 are very reactive because group 18 elements have complete outer shell and group 17 needs only one electron to complete octet.

In the periodic table , the group 18 elements are called as the noble gases. the group 18 elements have the complete octet that mean the complete valence shell and they are stable due to which they are un reactive and also called as inert gases.

In the group 17 , the elements are called as halogens. the group 17 elements have the incomplete outer shell and they only need one electron to complete their octet due to which they are very reactive.

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Answer:

they had killed other animals

I believe your answer is carried a serious disease.

Explanation: Buffalo are known to carry a disease called brucellosis, which can spread to livestock a kill other animals/

Answer:

can you show us question 3 pls

Explanation:

V2 = 2.499 2.5 L is the sample's volume when its temperature is raised to 30 °C and its pressure is lowered to 90 kilopascals.

What does the word "volume" actually mean?

The volume of an item is the space occupied inside its three-dimensional boundaries. A other word for it is the object's capacity.

What is the volume of the liquid?

The volume of liquid measured in a vessel's standard units is known as the liquid measurement. Infant milk bottle with milliliter measurement indications and juice bottle with a 1 liter capacity are two examples of vessels that have a "capacity" or "volume."

As,

Gas constant R is constant, so, Ideal gas equation can be written as,

                                        P₁ V₁ / T₁  =  P₂ V₂ / T₂

Solving for V₂,

                                          V₂  =  (P₁ × V₁ × T₂) ÷ (T₁ × P₂)

Putting Values,

                             V₂  =  (101.325 KPa × 2 L × 303 K) ÷ (273 K × 90 KPa)

                             V₂  =  61402.95 ÷ 24570

                             V₂  =  2.499 ≈ 2.5 L

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The structure of maleic acid is H2C=CH2 with a double bond between two hydrogen atoms and a double bond between the second and third carbon atoms in the three carbon chain.

H3C-C=C-COOH

\ /

H2C=CH2

1. Draw a three carbon chain with a double bond between the second and third carbon atoms

H3C-C=C-COOH

2. Add two hydrogen atoms to the second carbon atom

H3C-C=CH2-COOH

3. Draw a double bond between the two hydrogen atoms

H2C=CH2-COOH

H2C=CH2

      \  /

H3C-C=C-COOH

The structure of maleic acid is H2C=CH2 with a double bond between two hydrogen atoms and a double bond between the second and third carbon atoms in the three carbon chain.

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The final volume can be determined using Charles's law. The volume of gas at 5 degree Celsius will be 8.3 ml.

According to Charles's law, at constant pressure, the volume of a gas is directly proportional to the temperature.

Hence, V/T = constant.

Let, V1 and T1 be the initial volume and temperature and V2, T2 be the final quantities.

then, V1/T1 = V2/T2.

V2 = V1 T2/ T1

Given, V1 = 50 ml

T1 = 30 °C

T2 = 5 °C

Then, V2 = 50 ml × 5 °C /30 °C = 8.3 ml

Therefore, the volume of the gas reduces to 8.3 ml.

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The mole is the fundamental unit of substance quantity in the SI. 0.041143797572516 moles make up 1 gram of magnesium. The grams to moles formula Use the grams to moles formula to calculate the number of moles, n, of a substance with a given mass, m, (in grams) accurately. n = m / M.

Depending on the substance, yes. As a reminder, a mole is equal to 6.02 1023 atoms and is used to measure quantities. Therefore, it stands to reason that lead and hydrogen would weigh differently. Less moles would be required because it would take a lot fewer lead atoms to make up 1 gram. However, one hydrogen atom has far less mass than one lead atom, therefore more atoms (and moles) would be required to create one gram.

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If the temperature is raised to 402 K, the pressure (in atm) of this given sample of gas will be 4.5.

Given,

Pressure P1 = 3.4 atm

Temperature T1 = 300 K

       ⇒            T2 = 402 K

   ⇒                P2 = ?

    ⇒          P1/T1 = P2/T2

 ⇒         3.4/300 = P2/402

    ⇒              P2 = 4.5

   ⇒     Pressure = 4.5 atm

An atmosphere (atm) is a measuring unit that corresponds to the average air sea level pressure at 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere consists of 1,013 millibars of pressure, or 760 millimetres (29.92 inches) of mercury.

Pressure is defined as the force exerted by one material on another per unit area. The force also that gas exerts on the container limits is defined as gas pressure. Gas molecules travel at random over the specified volume. They clash with the surface as well as each other during this movement.

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The situation that best describes the effect of a limiting reactant is that when there is not enough A reactant to react with whole B.

The limiting reactant, also known as the limiting reagent, is the reactant that is used first during a chemical reaction, hence restricting the amount of product that can be produced. The limiting reactant can be identified in a variety of methods ,but they all require employing mole ratios from the balanced chemical equation.

The theoretical yield is the maximum quantity of product possible given the limiting reactant. The quantity of product actually procured, or actual yield, is usually always less than the theoretical yield. The percentage yield used to describe the actual yield indicates what portion of the theoretical yield was attained.

In the equation there is only one situation which describes the effect of limiting reagent when there is not enough of A to react with whole B.

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Answer:

Explanation:

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Answer:

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The diagrams of the arrangement of the electrons in calcium and magnesium have been shown in the image attached to this answer. There are two electrons in the valence shell of calcium.

We know that the electrons are the subatomic particles that we can be able to see in the shells of the atom. It is important that we ought to know that the electrons are the particles that are known to be responsible for the reactivity of the atom.

The number of the electrons that we can find in the atom would depend on the number of the protons that we have in the nucleus of the atom and this is because for the atom to be electrically neutral then we would have to have the same number of electrons and protons being in the atom as we know.

It is clear that calcium is a member of group two of the periodic table and that magnesium is also a member of group two of the periodic table.

The structures for calcium would have Ca and two dots while that of magnesium would have Mg and two dots.

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Answer:

D. it is an oxidizing agent

Explanation:

Answer:

          i)  Neon (Ne)

           ii)  Fluoride Ion (F⁻¹)

            iii)  Oxide Ion  (O⁻²)

Explanation:

                  Ions are those charged species which are either positively charged (by loosing electrons) called as cations or negatively charged (by gaining electrons) called as anions.

                 In given examples, Neon is a neutral atom which has an atomic number 10. It contains 10 electrons in its neutral state with the electronic configuration 1s², 2s², 2p⁶.

                 Fluorine atom has an atomic number of 9. Therefore, it contains 9 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁵. When Fluorine atom gains one electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶.

                Oxygen atom has an atomic number of 8. Therefore, it contains 8 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁴. When Oxygen atom gains two electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶ forming an Oxide Ion.

2H(g) + [tex]O_{2}[/tex] ⇒ 2H2O This equation obeys the law of conservation of mass.

The law of conservation of mass states that mass is neither created nor destroyed in chemical reactions. For example, carbon atoms in coal become carbon dioxide when burned. A carbon atom changes from a solid structure to a gas, but its mass remains the same.

In a chemical reaction, the mass of the chemical components before the reaction equals the mass of the components after the reaction. Therefore, for chemical reactions and low-energy thermodynamic processes in isolated systems, the total mass of reactants or starting materials must equal the mass of the products.

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Ni(OH)₂ is base but this is not strong base this is very weak base and this cannot gives OH⁻ after dissolving in H₂​​​O . this is only dissolve in acidic solution.

A solution is said to be acidic if it contains more positively charged hydrogen ions (H⁺) than negatively charged hydroxide ions (OH⁻). Lemon juice and vinegar are typical examples of acids. The amount of OH ions is greater in bases. Baking soda and regular ammonia are common examples.

Acidic substances can typically be distinguished by their sour flavor. A basic definition of an acid is a molecule that can donate an H⁺ ion and can continue to be energetically favorable even after losing H⁺. Blue litmus paper has a reputation for turning red when exposed to acids. Bases, on the other hand, are distinguished by their bitter flavor and slick consistency.

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Compared to safety standards, that would be too little chlorine:

10,000 gallons is five times as much water as 2,000.

Therefore, Park's pool needs five times as much chlorine as is required for 2,000 gallons to meet safety regulations.

5 times 3 pills of chlorine equals 15 tablets. For Mark to meet safety standards, 15 chlorine tablets would be required. Use one three-inch tablet for every 10,000 gallons of pool water rather than stuffing your chlorinator or floater to the brim with tablets. This quantity of pills should be sufficient to maintain a good chlorine level if you shock your water once a week.

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Answer:

86.6 mL

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 56.8 mL

Initial pressure (P₁) = 664 mmHg

Initial temperature (T₁) = 135 K

Final pressure (P₂) = 632 mmHg

Final temperature (T₂) = 196 K

Final volume (V₂) =?

The final volume of the gas can be obtained as follow:

P₁V₁/T₁ = P₂V₂/T₂

664 × 56.8 / 135 = 632 × V₂ / 196

Cross multiply

135 × 632 × V₂ = 664 × 56.8 × 196

85320 × V₂ = 7392179.2

Divide both side by 85320

V₂ = 7392179.2 / 85320

V₂ = 86.6 mL

Therefore, the final volume of the gas is 86.6 mL

Ninety-seven years is the half-life of 90Sr. A sample of 90Sr would still have 0.015 of its original atoms after 175 years. The duration needed for a quantity to fall to half its starting value is known as the half-life.

The phrase is frequently employed in nuclear physics to indicate how rapidly unstable atoms decay radioactively or how long stable atoms last. One or more electrons are attached to the nucleus of every atom, which is made up of a nucleus. Protons and neutrons, in various numbers, make up the nucleus. Neutrons exist only in the most prevalent type of hydrogen. Atoms that are neutral or ionised are the building blocks of all solids, liquids, gases, and plasma.

[A]t=[A]o/[A]t=4.18 [A]o/[A]t=e4.18=65.5

[A]o = 1.5%[A]o], where [A]t = 0.015

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