What is the percent strength of a 1:25 (weight/volume) solution?

Answer:

all of the aboveeee

Answer:

Idon't know if this helps but I think it is a linear structure and if I am wrong I am so sorry

Answer:

The heat of the reaction or standard enthalpy of the reaction CO(g) + H₂O(g) → CO₂(g) + H₂(g) is ΔH(rxn) = -41.2 kJ

Explanation:

The reaction whose standard enthalpy is required, as obtained from the internet is

CO(g) + H₂O(g) → CO₂(g) + H₂(g)

The formation reaction for some of the reactants and products are given as

C(s) + O₂(g) → CO₂(g) ΔH = -393.5 kJ

2CO(g) + O₂(g) → 2CO₂(g) ΔH = -566.0 kJ

2H₂(g) + O₂(g) → 2H₂O(g) ΔH = -483.6 kJ

To find the standard enthalpies of the given reaction, we need the heat of formation of each of the species involved in the reaction

ΔH (CO₂(g)) = -393.5 kJ

ΔH (H₂O(g)) = -483.6 kJ ÷ 2 = -241.8 kJ (Because 2 moles of H₂O(g) are formed in the given formation reaction)

ΔH (O₂(g)) = ΔH (H₂(g)) = 0 kJ (No heat of formation for elements)

ΔH (CO(g)) = ? (This isn't given)

But it can be calculated from the second given reaction

2CO(g) + O₂(g) → 2CO₂(g) ΔH = -566.0 kJ

Heat of reaction = ΔH(products) - ΔH(reactants)

Heat of reaction = -566.0 kJ

ΔH (products) = 2 × ΔH (CO₂(g)) = 2 × -393.5 = -787 kJ

ΔH (reactants) = [2 × ΔH (CO(g))] + [1 × ΔH (O₂(g))] = 2 × ΔH (CO₂(g))

Hence, we have

-566 = -787 - [2 × ΔH (CO₂(g))]

2 × ΔH (CO₂(g)) = -787 + 566 = -221 kJ

ΔH (CO₂(g)) = -221 ÷ 2 = -110.5 kJ

CO(g) + H₂O(g) → CO₂(g) + H₂(g)

Heat of reaction = ΔH(products) - ΔH(reactants)

ΔH (products) = [ΔH (CO₂(g))] + [ΔH (H₂(g))]

= -393.5 + 0 = -393.5 kJ

ΔH (reactants) = [1 × ΔH (CO(g))] + [1 × ΔH (H₂O(g))] = -110.5 - 241.8 = -352.3 kJ

Heat of reaction = -393.5 - (-352.3) = -41.2 kJ

Hope this Helps!!!

Answer:

Is this question multiple choice if it is i can most likely answer it!

Explanation:

Step 1

The equation to calculate ΔH (change of enthalpy) is:

(In the absence of standard formation enthalpies)

--------------------

Step 2

The reaction provided:

CH4 + 4 Cl2 => CCl4 + 4 HCl

--------------------

Step 3

Procedure: from step 1,

ΔH = [H(4H-C) + H(Cl-Cl)] - [H(4C-Cl) + H(4H-Cl)]

ΔH = [(4x411 + 4x242) - (4x327 + 4x427)] kJ/mol = - 404

ΔH = - 404 kJ/mol < 0 => Exothermic

Answer: The reaction is exothermic because the total bond energy of the reactants is less than the total bond energy of the products.

Answer:

Most of the food energy that enters a trophic level is "lost" as heat when it is used by organisms to power the normal activities of life. Thus, the higher the trophic level on the pyramid, the lower the amount of available energy.

Explanation:

Answer:

H2SO4(acid), NaOH(base)

Explanation:

The concentration of the solution originally was 1.8 M.

We know that the concentration of the solution is obtained from the formula of the neutralization reaction which is;

CAVA/CBVB = NA/NB

CA =  concentration of the acid

CB = concentration of the base

VA = volume of acid

VB = volume of base

NA = number of moles of acid

NB = number of moles of base

Then

CAVANB = CBVBNA

CA = CBVBNA/VANB

CA =  0.1  * 25 * 1/14.2 * 1

= 0.18 M

Using the formula;

C1V1 = C2V2

25 * C1 =  0.18 * 250

C1 = 0.18 * 250/25

C1 = 1.8 M

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Answer:

The waters' temp increased

Explanation:

The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.

The reaction that would not occur based on the electrochemical series is; FeCl₂ + Br₂ →

When we talk about the activity series, we need to be thinking about the ease with which elements react. If we are dealing with the metals we have to talk about the ease with which the metals are able to loose one or more electrons.

If we are dealing with the non metals, we have to look out how easily that the element is going to be able to accept one or more electrons. It is also clear that an element can only be able to any element that is below it in the periodic table of the elements.

We would now have to look at the replacements reaction to know the one in which a lower element in the series is reaction with a higher one. Armed with the knowledge of the table it is clear that bromine can not replace chlorine from its salt.

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The standard reduction potential of the Cr³+/Cr electrode is -0.46V. None of the option is correct.

To determine the standard reduction potential of the Cr³+/Cr electrode, we can use the Nernst equation, which relates the standard reduction potential to the cell potential under non-standard conditions. The Nernst equation is given by:

E = E° - (0.0592/n) * log(Q)

where E is the cell potential, E° is the standard reduction potential, n is the number of electrons transferred in the half-reaction, and Q is the reaction quotient.

In this case, we have the standard potential of the cell as −0.60V. We know that the standard reduction potential of the Sn/Sn²+ electrode is -0.14V. Therefore, the reduction potential of the Cr³+/Cr electrode can be calculated as:

E = -0.60V - (-0.14V)

E = -0.60V + 0.14V

E = -0.46V

Therefore, the standard reduction potential of the Cr³+/Cr electrode is -0.46V.

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3040mmHg pressure is nearly equal to 4 atm.

Atmospheric pressure (atm) is a unit of measurement equal to the mean atmospheric pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). Atmospheric pressure is most often approximated by the hydrostatic pressure caused by the weight of the air above the point of measurement. Air pressure decreases with altitude because as altitude increases, the air above has less mass. Since the atmosphere is thin relative to the Earth's radius (especially in the dense atmospheric layers at low altitudes), the Earth's gravitational acceleration as a function of altitude can be approximated as constant and contributes little to this decline. Pressure is measured as force per unit area in SI units Pascal (1 Pascal = 1 Newton per square meter, 1 N/m²). Atmospheric pressure at sea level is 760 cm Hg.

Given,

3040mmHg pressure

1 mmHg = 0.00131579 atm

3040mmHg = 3040 × 0.00131579 atm

3040mmHg = 4.0000016 atm

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The pressure of oxygen is 1 Ka

Partial pressure is the pressure that a gas would exert if it occupied the same volume as a mixture of gases, but alone. In other words, it is the pressure that a gas contributes to the total pressure of a mixture of gases.

The partial pressure of a gas can be calculated using the following equation:

Partial pressure = Total pressure x mole fraction

where the mole fraction is the fraction of the total number of moles of gas that is made up by the particular gas of interest.

Let total pressure = PA + PB + PC

Then the pressure of the oxygen = 74 - (54 + 19)

= 1 Ka

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Answer:

Option A. ZnCl₂ (aq) + H₂ (g)

Explanation:

In a chemical equation, reactants are located on the left hand side (L. H. S) while the products are located on the right hand side (R. H. S) i.e

Reactants —> Products

From the question given above, we obtained the following equation:

Zn (s) + 2HCl (aq) —> ZnCl₂ (aq) + H₂ (g)

The products of the above equation is:

ZnCl₂ (aq) + H₂ (g)

Answer:

answer is first one 1 will be less then that of hg coloumn

The exponent to the power of 0 would be the correct answer in this situation.

Initial rate is the rate of reaction at the beginning of a chemical reaction. It is usually measured at the start of the reaction and is usually higher than the rate at equilibrium. The initial rate is an important factor in determining the rate of reaction and the products of the reaction. It can be used to determine the effects of various factors such as temperature, pressure, and concentration on the reaction rate.

Exponents represent the number of times the base number is multiplied by itself. So, if the rate does not double nor stay the same, then it is not being multiplied by itself, so the exponent would be to the power of 0.

Exponentiation can be used to show how many times a number is multiplied by itself, and this is done by raising the base number to a certain power. For example, 4 to the power of 3 means 4 x 4 x 4 = 64. In this case, the exponent is 3.

If the initial rate does not double nor stay the same, then the power associated with the exponent would be 0. This is because the rate is not being multiplied by itself, so it would not be associated with any power. Therefore, the exponent would be to the power of 0.

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Answer:

A. The reaction shifts to the right (products) and the concentrations of I and H₂ decrease.

Explanation:

If gas is removed from the system at equilibrium, the system will try to compensate for the loss by shifting the reaction in a direction that produces more gas molecules. This is known as Le Chatelier's principle, which states that a system at equilibrium will respond to a disturbance by shifting in a way that minimizes the effect of the disturbance.

In this case, since gas is being removed from the system, the reaction will shift to the side that produces more gas molecules. Looking at the balanced equation, we can see that 2HI(g) has a greater number of gas molecules compared to H₂(g) and I₂(g). Therefore, the system will shift to the right (products) to produce more HI(g) and reestablish equilibrium.

The limiting reagent is aluminum. Mass of Al₂Cl₆ produced is 13.38 g. No excess Cl₂ remaining, so excess mass is 0.

To decide the restricting reagent, we really want to analyze the measures of aluminum and chlorine gas in the response to see which one will run out first.

The reasonable synthetic condition for the response is:

2Al(s) + 3Cl₂(g) → Al₂Cl₆(s)

The molar mass of aluminum is 26.98 g/mol, and the molar mass of chlorine gas is 70.90 g/mol. Utilizing these qualities, we can ascertain the quantity of moles of every reactant:

Number of moles of Al = 2.70 g/26.98 g/mol = 0.100 mol

Number of moles of Cl₂ = 4.05 g/70.90 g/mol = 0.057 mol

From the reasonable condition, we can see that 2 moles of aluminum respond with 3 moles of chlorine gas to create 1 mole of Al₂Cl₆. Subsequently, the stoichiometric proportion of aluminum to chlorine gas is 2:3. To figure out which reactant is restricting, we want to ascertain the quantity of moles of Al₂Cl₆ that can be delivered from every reactant:

Moles of Al₂Cl₆ delivered from Al = 0.100 mol Al × 1 mol Al₂Cl₆/2 mol Al = 0.050 mol Al₂Cl₆

Moles of Al₂Cl₆ delivered from Cl₂ = 0.057 mol Cl2 × 1 mol Al₂Cl₆/3 mol Cl₂ = 0.019 mol Al₂Cl₆

Since the response requires 0.050 moles of Al to deliver 0.025 moles of Al₂Cl₆, while just 0.019 moles ofAl₂Cl₆ can be created from 0.057 moles of Cl₂, aluminum is the restricting reagent.

To ascertain the mass of Al₂Cl₆ delivered, we can utilize the quantity of moles of Al that responded and the molar mass of Al₂Cl₆:

Mass of Al₂Cl₆ delivered = 0.050 mol Al × 267.69 g/mol Al₂Cl₆ = 13.38 g

To compute the mass of the abundance reactant remaining, we want to initially ascertain the quantity of moles of Cl₂ that responded with the entirety of the aluminum:

Moles of Cl₂ required = 0.100 mol Al × 3 mol Cl₂/2 mol Al = 0.150 mol Cl₂

The quantity of moles of Cl₂ that are in abundance can be determined by taking away the moles of Cl₂ expected from the moles of Cl₂ that were at first present:

Overabundance moles of Cl₂ = 0.057 mol Cl₂ - 0.150 mol Cl₂ = - 0.093 mol Cl₂

Since the outcome is negative, there is no overabundance Cl₂ remaining. Accordingly, the mass of the abundance reactant is zero.

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Answer:i believe 9-?

Explanation:

boron-10

boron-11

carbon-12

carbon-13

oxygen-16

oxygen-17

oxygen-18

chlorine-35

chlorine-37

The volume occupied at 25 °C. Remember to convert between °C and K. V2 = 3.311 L is the correct answer.

What is volume?

Volume is a measure of the amount of space occupied by an object, or the amount of matter contained within it. It is measured in units such as cubic metres, cubic centimetres, litres, millilitres, etc. Volume is a three-dimensional concept, meaning that it requires three measurements to be taken in order to accurately measure the amount of space an object occupies. The volume of a solid object can be determined by applying the formula V = l x w x h, where l is the length, w is the width, and h is the height of the object. For a liquid or gas, the volume is calculated by measuring its mass and the density of the substance. Volume can also be used to describe the total amount of space something occupies, such as the volume of a room or the volume of a storage container.

Temperature and Volume equation

Given,

The volume at -12°C = 2.90L

Temperature, T1 = -12°C

= (-12°C + 273)

= 261K

And, Volume at 25°C = ?

(25°C + 273)K

= 298K

Now, by using this equation:-

V1/T1 = V2/T2

V2 = V1 x T2/T1

V2 = 2.90L x 298K/261K

V2 = 3.311L

Hence, The volume at  25°C will be 3.311L

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Explanation:

lo que tú as puesto es falso

Answer:

its prob B since thats the system that protects the body from harmful substances

Explanation:

Answer:

B since that's the system that protects the body from harmful substances.

hope you like it

Answer: I think the answer is 2.

Explanation:

Answer:

Its B

Explanation:

Answer:

I think the answer is polar covalent as there will be an unequal amount of electrons shared/available. An ionic bond will not take place because the valance shell of the larger atom contains more than 1 electron.

You are dealing with a neutralization reaction that takes place between acetic acid,

CH

3

COOH

, a weak acid, and sodium hydroxide,

NaOH

, a strong base.

Now, the pH of the resulting solution will depend on whether or not the neutralization is complete or not.

If the neutralization is not complete, more specifically if the acid is not completely neutralized, you will have a buffer solution that will contain acetic acid and its conjugate base, the acetate anion..

It's important to note that at complete neutralization, the pH of the solution will not be equal to

7

. Even if you neutralize the weak acid completely, the solution will be left with its conjugate base, which is why you can expect its pH to be greater than

7

.

So, the balanced chemical equation for this reaction is

5.35

Answer:

10.4 M

Explanation:

5.2 Moles / .5 L = 10.4 M

Answer:

Hey there can you post the complete question ,i cannot find any element

Answer:

Explanation:

PLATO ANSWER