Descibe the stages of magneisum chloride from an acid and a metal

Therefore, 0.00723 moles of Na3C6H5O7 can be produced if one tablet containing 0.0217 mol of NaHCO3 is dissolved.

The balanced chemical equation shows that 3 moles of NaHCO3 react with 1 mole of H2C6H6O7 to produce 1 mole of Na3C6H5O7. Therefore, the number of moles of Na3C6H5O7 produced is directly proportional to the number of moles of NaHCO3.

If one tablet containing 0.0217 mol of NaHCO3 is dissolved, then according to the balanced chemical equation, the number of moles of Na3C6H5O7 produced is:

(0.0217 mol NaHCO3) x (1 mol Na3C6H5O7 / 3 mol NaHCO3) = 0.00723 mol Na3C6H5O7

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A 1.0 × 10⁻⁸ M solution of the HCl have the pH < 7. The value of the pH for HCl is pH = 6.99.

The concentration of the HCl = 1.0 × 10⁻⁸ M

Total [H⁺] =  [H⁺]  HCl +  [H⁺] water

The HCl is the strong acid , so it completely ionizes.

[H⁺] H₂O = X

Total [H⁺] = X + 1.0 × 10⁻⁸

[H⁺] [OH⁻] = 1 × 10⁻¹⁴

X₂ + 10⁻⁸X - 10⁻¹⁴ = 0

X = 9.5 × 10⁻⁸

Total [H⁺] = 9.5 × 10⁻⁸ + 1.0 × 10⁻⁸

                = 1.05 × 10⁻⁷

pH = - log [H⁺]

pH = - log [1.05 × 10⁻⁷]

pH = 6.99.

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According to mole concept, mass of 5.2 moles of calcium nitrate is 853.216 g.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Number of mole= mass / molar mass, thus, mass =5.2×164.08=853.216 g.

Thus, the mass of 5.2 moles of calcium nitrate is 853.216 g.

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Answer:

125 lbs would round to C. 56.8kg

Ca(OH)2 is sparingly soluble in water. We get this information from the Solubility product of Ca(OH)2.

The solubility product constant is the equilibrium constant for the dissolution of a solid substance into an aqueous solution. It is denoted by the symbol Ksp. The solubility product is a kind of equilibrium constant and its value generally depends upon the temperature.

We calculate the solubility product by taking the solid's solubility that is then expressed in the units of moles per liter (mol/L), known as its molar solubility.

The solubility product (Ksp) of Ca(OH)2 at 25∘C is 4. 42×10−5. From this we can infer that Ca(OH)2 is only slightly soluble in water (0.16g Ca(OH)2/100g water at 20°C) by forming a basic solution that is generally called as lime water. The solubility generally decreases with increasing temperature.

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The steady state of ozone concentration in the stratosphere refers to the equilibrium level of ozone concentration at which the rate of formation of ozone is equal to the rate of its destruction.

Ozone is continually being produced in the stratosphere by chemical reactions involving oxygen and ultraviolet radiation from the Sun, while its concentration is simultaneously decreased by a number of processes including catalytic destruction by nitrogen oxides. The steady state of ozone concentration is determined by the balance between these two processes.

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Answer:

3 KOH(aq) + H3PO4(aq) = K3PO4(aq) + 3 H2O

Explanation:

Answer:

32.09 amu is that an option i’m pretty sure that’s right but i would try and make sure

Explanation:

Answer:

I believe it's copper

Explanation:

The reasoning being that Copper = 9.0 g/cm and the mystery item has 5.0 cm so 9*5 = 45 something like that

The hydrogen molecule is being oxidized in the fuel cell.

In a fuel cell, the hydrogen molecule (H₂) acts as the fuel. During the operation of a fuel cell, a redox (reduction-oxidation) reaction takes place. In this reaction, hydrogen is oxidized, which means it loses electrons. The oxidation of hydrogen occurs at the anode of the fuel cell.

In a fuel cell, hydrogen gas is supplied to the anode, where it is split into protons (H⁺) and electrons (e⁻) through a process called electrolysis. The electrons are then forced to travel through an external circuit, creating an electric current that can be used to power devices. Meanwhile, the protons move through a proton exchange membrane (PEM) to the cathode.

At the cathode, an oxidizing agent (typically oxygen from the air) combines with the electrons and protons to form water (H₂O). This reduction process at the cathode involves the gain of electrons by the oxidizing agent, which in this case is oxygen. Therefore, the reduction of oxygen is occurring at the cathode.

The hydrogen molecule is being oxidized in the fuel cell, meaning it is losing electrons. This oxidation process provides the electrons necessary for the reduction of the oxidizing agent, which is typically oxygen.

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Answer:

The correct answer is: 1.035 x 10⁻³ M

Explanation:

The dissociation equilibrium for acetic acid (CH₃COOH) is the following:

CH₃COOH(aq) ↔ CH₃COO⁻(aq) + H⁺(aq)  Kc = 1.8 x 10⁻⁵

The expression for the equilibrium constant (Kc) is the ratio of concentrations of products over reactants. The products are acetate ion (CH₃COO⁻) and hydrogen ion (H⁺) while the reactant is acetic acid (CH₃COOH):

\(Kc=\frac{[CH_{3} COO^{-} ][H^{+} ]}{[CH_{3} COOH]}= 1.8 x 10^{-5}\)

Given: [CH₃COOH]= 0.016 M and [CH₃COO⁻]= 0.92 M, we replace the concentrations in the equilibrium expression and we calculate [H⁺]:

\(\frac{(0.016 M)[H^{+} ]}{(0.92M)}= 1.8 x 10^{-5}\)

⇒[H⁺]= (1.8 x 10⁻⁵)(0.92 M)/(0.016 M)= 1.035 x 10⁻³ M

Answer:

Option B. It is a basic solution.

Explanation:

To know which option is correct, let us calculate the pH of the solution.

First, we shall determine the pOH of the solution. This is illustrated below:

Concentration of Hydroxide ion, [OH¯] = 3.5×10¯⁶

pOH =.?

pOH = –Log [OH¯]

pOH = –Log 3.5×10¯⁶

pOH = 5.5

Finally, we shall determine the pH. This can be obtained as follow:

pOH = 5.5

pH =?

pH + pOH = 14

pH + 5.5 = 14

Collect like terms

pH = 14 – 5.5

pH = 8.5

The pH scale reads as follow:

0 to 6 => Acidic

7 => Neutral

8 to 14 => Basic

Comparing the pH of the solution (i.e 8.5) with the pH scale, we can conclude that the solution is basic because the pH of solution lies between 8 and 14.

The exercises refer to hydrocarbons. Depending on the type of bond, it will be the termination of the name of the molecule.

For a single bond: End with the suffix -ane

For double bond: Ends in -ene

For triple bond: Ends in -yne

Let's look at each particular case

a) Heptene

Hept- means 7 carbons, so we have a compound with 7 carbons and one double bond. The formula will be:

c)Hexane

6 carbons with a simple bond

d)Pentane

5 carbons with a simple bond

e)Propyne

3 carbons with a triple bond

This process is referred to as neutralization, which occurs when the pH of a solution is adjusted to 7.

When the OH⁻ is subtracted from the H, the result is a negative number. In order to neutralize the remaining OH⁻, more H⁺ ions need to be formed.

Hydrogen ion concentration, also known as pH, is a critical parameter in chemical reactions, particularly those involving acids and bases. The pH scale ranges from 0 to 14, with a pH of 7 being neutral, indicating equal concentrations of H⁺ and OH⁻.

pH values less than 7 indicate an acidic solution, while pH values greater than 7 indicate a basic solution.In order to neutralize the remaining OH⁻, more H⁺ ions must be formed. The neutralization reaction occurs when an acid and a base react, forming a salt and water.

The equation for a neutralization reaction is typically represented as follows:Acid + Base → Salt + WaterThe amount of H⁺ and OH⁻ ions present determines the acidity or alkalinity of a solution.

When the OH⁻ is subtracted from the H, the result is a negative number. As a result, extraH⁺ ions must be formed in order to balance the remaining OH⁻ ions.

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Answer:

V = 15.6 L

Explanation:

Hello there!

In this case, according to the definition of molarity in terms of the moles of solute divided by the volume of the solution, it is possible for us to write:

\(M=n/V\)

Thus, given the moles and concentration of the solution, we can find the volume as shown below:

V=n/M

Therefore, we plug in the given data to obtain:

V = 2.5mol /(0.16mol/L)

V = 15.6 L

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The correct matching of the properties of the elements are;

Rubidium - catches fire as soon as it s exposed to air and burns fiercely

Lithium - hard to set alight but burns with a deep red flame

Potassium - Melts readily on heating with a Bunsen flame and catches fire easily. Burns with a mauve flame.

Sodium - Melts fairly readily with  Bunsen flame then catches fire and burns with a deep yellow flame

We know that elements are classified into groups. The groups are a family of elements that have similar chemical and physical properties. Now we have the to match the properties of the elements as shown;

Rubidium - catches fire as soon as it s exposed to air and burns fiercely

Lithium - hard to set alight but burns with a deep red flame

Potassium - Melts readily on heating with a Bunsen flame and catches fire easily. Burns with a mauve flame.

Sodium - Melts fairly readily with  Bunsen flame then catches fire and burns with a deep yellow flame

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Answer:

167.5g

Explanation:

From the question, we know the mass of NaCl and the molar mass of NaCl, so we can calculate the number of moles of NaCl:

Moles = mass ÷ molar mass

The molar mass of NaCl can be calculated by adding the relative formula masses of the elements Na and Cl:

23.0 + 35.5 = 58.5

We can use the formula to find the number of moles of NaCl:

moles = 138 ÷ 58.5

= 2.35897...

Now, we need to find the mass of Cl2. Rearranging the formula of moles = mass ÷ molar mass

mass = moles × molar mass

Calculating the molar mass of Cl2 by adding the relative atomic masses:

35.5 + 35.5 = 71

Hence the mass is:

2.35897... × 71 = 167.5g (to 1dp)

Answer:

Explanation:

C = 41.4/12 = 3.43

H = 3.47/1 = 3.47

O = 55.1/16 =3.44

CHO is the skeletal formula (divide each by the lowest number above). The results are close enough to 1 to be 1.

(CHO)_x = 116

C + H + O = 29

(29) _ x = 116

x = 116/29

x = 4

So there area 4 carbons 4 hydrogens and 4 oxygens.

The correct formula is C4H4O4

Hops, flowers of humulus lupulus provides beer with its characteristic bitter flavor.

Hops are the flowers, or cones, of a plant called humulus lupulus. Hops help to keep beer fresher, longer; help beer retain its head of foam—a key component of a beer's aroma and flavor; and, of course, add “hoppy” aroma, flavor, and bitterness.

A hop resin called alpha acid gives beer its bitterness. The oils give certain beer styles, like pale ales, their floral, citrusy, hoppy aromas. When hops are boiled, the alpha acid undergoes some chemical changes that allows it to bitter the beer.

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Answer:

A

Explanation:

The answer to this question is A. Both ripening and spoiling are chemical reactions.

Spoiling is a chemical reaction because spoiled food has bad smell and taste and it changes colour too.

Ripening of fruits is a chemical change. For example the colour could change as well as the texture.

Answer:

option a) chemical reaction, chemical reaction.

Explanation:

Changes in which new substances with different properties are formed are called chemical changes. Cooking of food, burning of substances are chemical changes as entirely new substances are formed. Burning of a candle wax releases carbon dioxide and water vapour (new substances). in here ripening and spoiling is a change that cannot be reversed which makes it a chemical change.

Answer:

C

B

Explanation:

throwing cotton balls causes the person to blink.

and Its not an allergic reaction so it's more of stomach pain that sneezing

Answer:

it should be c for the first one then b for the second one

Explanation:

hope it helps :)

Answer:

where the following choices??

Explanation:

The potential of the concentration cell is 0.1182 V when the reaction is spontaneous.

An electrolytic cell that contains two half cells with the same electrodes but with different concentrations is known as a concentration cell.

Nernst Equation helps in determining the cell potential under the non-standard conditions that are at any known temperature, pressure, and concentration. It is given by

\(E = E^o - \frac{2.303RT}{F} log Q\)

At T = 298 K,

\(E = E^o - \frac{0.0591}{n} logQ\)

For Ni concentration cell, anode and cathode are the same and thus E° is zero

At anode,

\(Ni (s)\rightarrow Ni^2^+ + 2e^-\)

At Cathode,

\(Ni^2^+ + 2e^-\rightarrow Ni (s)\)

No of moles of electrons, n = 2

Then, the potential of the cell is given by

\(E=- \frac{0.0591}{n} logQ\)

\(Q = \frac{[diluted Ni]}{[concentrated Ni]}\)

diluted Ni = 1 x 10⁻⁴ M and concentrated Ni = 1 M

\(E = \frac{-0.059}{2} log\frac{ 10^-^4}{1}\\ = \frac{-0.059}{2} \times -4 log10\)

log(10) = 1

E = 0.1182 V

Hence, the potential of the cell is 0.1182 V.

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The reaction rate between solutions O won't be impacted by bleach (optio c). Practically speaking, a fairly specific per-iod marks the start of the reactants' phase of the "chemical reaction."

Rubber alcohol, salt water, and sugar dissolved in water are a few examples of solutions. When mixing salt and water, the salt particles become so small that they are no longer visible with the nak-ed eye, indicating that the mixture is homogenous.

A continuous variation in the relative proportions of two or more substances that is homogeneous and can be changed up to the solubility limit. Although the word "solution" is typically used to describe the liquid state of matter, it is also possible for gases and solids to form solutions.

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conversion between mass and moles#

A substance's molar mass is calculated by multiplying its relative atomic mass by the molar mass constant (1 g/mol). The molar mass constant can be used to convert mass to moles. By multiplying a given mass by the molar mass, the amount of moles of the substance can be calculated.

Answer:

El agua oxigenada se encuentra en cuatro concentraciones diferentes expresadas “en tanto por ciento”: 8%, 30%, 35% y 50%. Sin embargo, hay quien prefiere hablar de “volúmenes” y no de “porcentajes”.

The correct answer is C. In a unimolecular substitution reaction, the rate determining step is typically the formation of a carbocation intermediate.

This is because the carbocation is a high-energy, unstable species, and the process of forming a carbocation requires a significant amount of energy. Once the carbocation has formed, the reaction can proceed quickly through attack by a nucleophile. Additionally, the formation of a carbocation is irreversible under typical reaction conditions, so it does not readily undergo back reaction.

The other answer choices are not correct: A refers to a different type of reaction mechanism, B is not typically observed in unimolecular substitution reactions, D is incorrect because carbocation formation is not reversible, and E is also not typically observed in unimolecular substitution reactions.

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