number of SO2 molecules in 1.28moles of SO2

Answer:

neutron and proton in the nucleus

electron in the electron cloud

Answer:

the answer is B,A, B

Explanation:

The neutron is found at  

B

The electron is found at  

A

The proton is found at  

B

Edgy Engine Components, Inc. ,Fidgety Fix-It, Inc. and Greasy Motor Parts Company, refuses to sell which is an example of a. a group boycott.

In terms of competition law, a group boycott is a particular kind of secondary boycott in which two or more rival businesses in a particular market refuse to do business with a company unless the latter agrees to stop working with one of their current or future rivals.  It is a type of refusal to do business and can be used to keep a competitor out of a market or to stop a new company from entering one.

A group boycott has historically described by the US Supreme Court as a coordinated refusal to negotiate or a collective action intended to persuade another party to take a particular action by refusing to do business with or recruiting others to refuse to do business with the target. However, the Court only permits commercially motivated boycotts under this doctrine.

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Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.

Answer:

Newton's third law of motion states that every action, there is an equal and opposite reaction force and that forces come in pairs

3.21 grams of Aluminum Sulfate are got when 4 g of Aluminum Nitrate reacts chemcially with 3 g of Sodium Sulfate.

The equation given is not balanced. Thus,  when balanced the equation becomes:

2 Al(NO₃)₃ + 3 Na₂SO₄ → Al₂(SO₄)₃ + 6 NaNO₃

The molar mass of Al(NO₃)₃ is:

Al(NO₃)₃ = 1(Al) + 3(N) + 9(O) = 213 g/mol

The molar mass of Na₂SO₄ is:

Na₂SO₄ = 2(Na) + 1(S) + 4(O) = 142 g/mol

From the balanced equation, we can see that 2 moles of Al(NO₃)₃ react with 3 moles of Na2SO4 to produce 1 mole of Al₂(SO₄)₃. Therefore, we can calculate the number of moles of Al(NO₃)₃ and Na₂SO₄ that react:

Number of moles of Al(NO₃)₃ = 4 g / 213 g/mol = 0.0188 mol

Number of moles of Na₂SO₄ = 3 g / 142 g/mol = 0.0211 mol

From the balanced equation, we can see that 2 moles of Al(NO₃)₃ produce 1 mole of Al₂(SO₄)₃. Therefore, the number of moles of Al₂(SO₄)₃ produced is:

Number of moles of Al₂(SO₄)₃ = 0.0188 mol / 2 * 1 = 0.0094 mol

The molar mass of Aluminum Sulfate (Al₂(SO₄)₃) is:

Al₂(SO₄)₃ = 2(Al) + 3(S) + 12(O) = 342 g/mol

Therefore, the mass of Aluminum Sulfate produced is:

Mass of Al₂(SO₄)₃ = Number of moles of Al₂(SO₄)₃ * Molar mass of Al₂(SO₄)₃

= 0.0094 mol * 342 g/mol

= 3.21 g

Hence, 3.21 grams of Aluminum Sulfate are liberated when 4 g of Aluminum Nitrate change state with 3 g of Sodium Sulfate.

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Answer:

KCL

Explanation:

is more soluble in 100grams of H2O at 70 degrees Celsius?

The ph value of human saliva is between 6.2-7.6 with 6.7 being the average pH

ph value of human saliva is 7 and 6

Commercial agriculture can often lead to water-quality problems in the following ways:

Water quality refers to the state of a water body that encompasses it's physical, chemical and biological characteristics.

The water quality of a water body is crucial to its suitability for domestic or drinking purpose.

Commercial agriculture greatly affects water quality in the following ways:

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Answer:false

Explanation:

Answer:

the boiling point of solution at 3 decimal point is 100.329०C Ans.

Explanation:

given data -

molality of Nacl = 0.321 m

molal boiling point elevation constant (Kb) =0.512०C/m

# formula of change of boiling point of sample =

∆ Tb =i × Kb × m

Kb = molal boiling point of elevation constant

m = molality

i = vont's hoff factor.

Nacl is strong electrolyte and its 100% dissociate so the value of i for Nacl is 2

put value in the formula

∆ Tb = 2 × 0.512 ०C/m × 0.321m

= 0.3287

= 0.329०C

∆Tb = T'b - Tb

T'b = boiling point of solution

Tb= boiling point of solvent( water)

0.329०C = T'b - 100०c ( boiling point of water = 100०C)

T'b = 0.329०C + 100०C

= 100.329०C

hope this helps

the answer should be a the the question

The equation which is balanced is S₈ + 12O₂ → 8SO₃.

Balanced reactions are those reactions in which all entities are present on the reactant side as well as on the product side of the reaction.

Above equation is unbalanced as all atoms are not present in same amount.

Above equation is unbalanced as all atoms are not present in same amount.

Above equation is balanced as all atoms are present in same amount on reactant side as well as product side.

Above equation is unbalanced as all atoms are not present in same amount.

Hence, S₈ + 12O₂ → 8SO₃ is a balanced equation.

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Answer:

A. Producing a fire gram fuel

Explanation:

None of the other actions create light. Fire gives off light and heat.

Answer:

✨Gravity✨ hope this helps

Explanation:

The equation in which the enthalpy of formation is the same as the enthalpy of reaction is option A.

The term enthalpy has to do with the heat that is giving out or is absorbed in a reaction. We know that the enthalpy of formation would refer strictly to the heat that is given out or absorbed when a substances is formed from its constituents under standard conditions.

We know that when we are looking at the enthalpy of formation of a substance, we are looking at the way that the elements that make up the substance are able to combine and these elements that are becoming combined in the substance would have to do that under standard conditions so as to generate the equation of the enthalpy of formation of the substance.

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Answer:

Crystallization or crystallisation is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.

Explanation:

A heat exchanger, works like a condenser, where the steam is cooled.

Answer: c. cool the reactor water.

The pressure gauge on a compressed air tank that reads 43.2 mmHg is equivalent to 0.057atm.

Pressure in chemistry refers to the force of all the gas particle/wall collisions divided by the area of the wall.

Millimetre of mercury (mmHg) is a unit of pressure equal to the amount of fluid pressure one millimeter deep in mercury at zero degrees Celsius on Earth.

Atmospheric pressure (atm) is the unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius. It can be converted as follows:

Divide mmHg value by 760 i.e. 43.2 ÷ 760

43.2mmHg is equivalent to 0.057atm

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From the given graph, if we change from a moderately acidic environment ( pH near 6) to a basic environment, the peroxidase activity will decrease. Therefore, option (A) is correct.

pH can be described as the negative logarithm of hydrogen ion (H⁺) concentration. Mathematically, pH is generally inversely proportional to the concentration of hydrogen ions (H⁺).

pH = -log ([H⁺])

In chemistry, pH is a scale used to determine the acidity or basicity of an aqueous solution. Acidic solutions are calculated to have lower pH values than basic or alkaline solutions.

The pH scale possesses ranges from 0 to 14 while pH 7.0 is neutral. A low pH (about 1 or 2) is acidic and a high pH (12 or 14) is basic.

When we change the moderately acidic environment to a basic environment. We actually increase the pH value in the graph showing the peroxidase activity decreases when pH increases more than 6.

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Li₃PO₄ + 3 Zn(NO₃)₂ → 3 LiNO₃ + Zn₃(PO₄)₂. In this balanced equation, one of the products is Zn₃(PO₄)₂. To ensure that the equation is balanced, we need 3 moles of Zn(NO₃)₂ for every 1 mole of Li₃PO₄.

In a chemical reaction, a product is a substance that is formed as a result of the chemical reaction. It is the end result of a chemical reaction, and it is produced by the rearrangement of atoms and/or ions of the reactants.

In the given equation, we end up with 1 mole of Zn₃(PO₄)₂ for every 3 moles of Zn₃(PO₄)₂. This means that the molar ratio of Zn₃(PO₄)₂ to Zn₃(PO₄)₂ is 1:3, indicating that we need three times as much Zn₃(PO₄)₂ as Zn₃(PO₄)₂ to balance the equation. Therefore, one of the products, Zn₃(PO₄)₂, must be produced in a smaller quantity than the other product, LiNO₃.

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Answer:

Label A shows cold area on the mug, while label B shows a warm area.

Explanation:

Have a good day

Answer: Volume required is 0.115 L or 115 ml

Explanation:

moles of \(NaHCO_3\) = \(\frac{\text {given mass}}{\text {Molar mass}}=\frac{1.30g}{84g/mol}=0.015mol\)

The balanced chemical equation is:

\(HCl+NaHCO_3\rightarrow NaCl+H_2CO_3\)

1 mole of \(NaHCO_3\) requires = 1 mole of HCl

Thus 0.015 mol of \(NaHCO_3\) requires = \(\frac{1}{1}\times 0.015=0.015\) mole of HCl

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in L

\(0.130=\frac{0..015}{V_s}\)

\(V_s=0.115L\)

Thus volume required is 0.115 l or 115 ml

Answer:

A. [OH⁻] = 2.188x10⁻³M

B. pKb = 6.02

Explanation:

When hydrazine is in equilbrium with water, its reaction is:

N₂H₄(aq) + H₂O(l) ⇄ HN₂H₄⁺(aq) + OH⁻(aq)

Where Kb, is defined as the ratio between concentrations in equilibrium of the species, thus:

Kb = [HN₂H₄⁺] [OH⁻] / [N₂H₄]

A. From pH, you can find [OH⁻], thus:

pH = -log [H⁺]

11.34 = -log [H⁺]

4.57x10⁻¹² = [H⁺]

As 1x10⁻¹⁴ = [OH⁻] [H⁺]

1x10⁻¹⁴ / 4.57x10⁻¹² = [OH⁻]

B. Concentrations in equilibrium of the species are:

[N₂H₄] = 5.0M - X

[HN₂H₄⁺] = X

[OH⁻] = X

Where X is reaction coordinate

As [OH⁻] = 2.188x10⁻³M

X = 2.188x10⁻³M

Replacing:

[N₂H₄] = 5.0M - 2.188x10⁻³M = 4.9978M

[HN₂H₄⁺] = 2.188x10⁻³M

[OH⁻] = 2.188x10⁻³M

Replacing in Kb expression:

Kb = [HN₂H₄⁺] [OH⁻] / [N₂H₄]

Kb = [2.188x10⁻³M] [2.188x10⁻³M] / [4.9978M]

Kb = 9.577x10⁻⁷

pKb is defined as -log Kb

pKb = -log 9.577x10⁻⁷

CaCO3 (s) + 2HCl(aq) → CaCl2 (s) + H2O(aq) + CO2(g). The principle of mass conservation is essential for balancing chemical equations.

Chemical Reaction TypesSynthesis processes reactions of decomposition.responses with only one substitution.reactions involving two replacements.

Double displacement reactions often occur in aqueous solutions where there is an ion exchange and ion precipitation.For instance, a white precipitate containing barium sulphate forms right away when a solution containing barium chloride and sodium sulphate is combined.These are ionic-based reactions.

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The classification of the substances are as follows;

1) C

2) MOE

3) MOEAC

4) MOC

5) E

6) C

7) E

8) MOEAC

9) MOE

10) MOEAC

11) C

12) MOC

13) MOC

14) MOC

15) MOC

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Elements are composed of only one type of atom, and they are listed on the periodic table. For example, oxygen, gold, and carbon are all elements.

A compound is a substance composed of two or more elements chemically combined in a fixed ratio. The properties of a compound are different from those of the elements that make it up. For example, water is a compound made up of two elements, hydrogen and oxygen, and has different properties than its constituent elements.

A mixture is a combination of two or more substances that are not chemically combined. Mixtures can be composed of elements, compounds, or both, and they can be separated by physical means.

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An incredibly intriguing Palladium approach to high-rate energy storage and distribution is to take advantage of the high surface-area-to-volume ratio of nanomaterials by storing energy in the form of electrochemical alloys.

Palladium hydride at the nanoscale is a great model system for learning how characteristics at the nanoscale influence the absorption and desorption of energy-carrying equivalents. In shape-controlled Pd nanostructures, hydrogen absorption and desorption do not take place uniformly throughout the surface of the nanoparticles. Instead, high-activity spots at the corners and edges are used to selectively absorb and desorb hydrogen. With such a process, the benefits of shrinking the palladium's size to the nanoscale are significantly diminished. We alter the palladium surface with an incredibly thin platinum shell to resolve this. This alteration allows diffusion to occur across the entire Pd/Pt surface and practically eliminates the barrier to hydrogen absorption (89 kJ/mol without a Pt shell and 1.8 kJ/mol with a Pt shell).

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Answer:

142.36 kg

Explanation:

volume of water in the lake = surface area x depth

= 18.5 x ( 1760 x 3 )² x 39 ft³

= 2.011 x 10¹⁰ ft³

= 2.011 x 10¹⁰ x 28.3168 liter .

= 56.945 x 10¹⁰ liter .

concentration of mercury = .25 x 10⁻⁶ g / liter

= 25 x 10⁻⁸ g / liter

= 25 x 10⁻¹¹ kg / liter

mass of mercury in the water of lake

= 25 x 10⁻¹¹ x 56.945 x 10¹⁰ kg

= 142.36 kg .