The henry's law constant for h2 is 8. 1×10−4 matm at 25∘c. what pressure of hydrogen is needed to maintain a h2 concentration of 0. 42 m?

Answer:

doe sit have a picture-

Explanation:

The percentage of salt in the solution is 20%.

To calculate the percentage of salt in a solution, we need to divide the mass of the salt by the total mass of the solution and then multiply by 100.

Given:

Volume of water = 100 mL

Mass of salt = 25 g

To determine the total mass of the solution, we need to consider the mass of water and the mass of salt:

Total mass of solution = Mass of water + Mass of salt

Converting the volume of water from milliliters to grams, assuming the density of water is approximately 1 g/mL:

Mass of water = Volume of water * Density of water

Mass of water = 100 mL * 1 g/mL = 100 g

Total mass of solution = 100 g + 25 g = 125 g

Now we can calculate the percentage of salt in the solution:

Percentage of salt = (Mass of salt / Total mass of solution) * 100

Percentage of salt = (25 g / 125 g) * 100

Calculating:

Percentage of salt = 20%

Therefore, the percentage of salt in the solution is 20%.

learn more about solution here

https://brainly.com/question/1616939

#SPJ11

Answer:

When gases in containers are heated, their molecules increase in average speed. This means that they exert a greater force when they collide with the container walls, and also collide with the walls more frequently. The gas is therefore under greater pressure when its temperature is higher.

Answer:color change and formation of precipitate.

Explanation: The reaction of products of the chemical reaction may have different properties

The heaviest element that was created in the Big Bang is lithium (option c).

During the early stages of the universe, known as Big Bang nucleosynthesis, the conditions were hot and dense enough for the fusion of protons and neutrons to form light elements. While hydrogen and helium were the most abundant elements produced, a small amount of lithium-7 was also synthesized. However, the production of heavier elements through fusion processes required the later formation of stars and subsequent stellar nucleosynthesis.

Hence, the correct option is option c.

Learn more about the big bang here:

https://brainly.com/question/17209127

#SPJ 4

Answer:it will sink in water

Explanation:

The process which is best described by "A" in this Venn diagram is: C. fusion of atoms.

Nuclear fusion can be defined as a type of nuclear reaction that involves joining or combining two (2) smaller nuclei of atoms, so as to form a single heavier nucleus accompanied with the release of energy.

Based on the Venn diagram in the image attached below, we can logically deduce that the process which is best described by "A" is fusion of atoms.

Read more on nuclear fusion here: https://brainly.com/question/9903602

#SPJ1

Weak acids dissociate partially in the water, releasing fewer protons (H+) than strong acids. This results in a lower pH compared to strong acids because there are fewer protons available to form hydrogen ions.

The pH changes more with weak acids because they do not completely dissociate in water. This means that there are fewer hydrogen ions available to affect the pH. Strong acids, on the other hand, completely dissociate in water, meaning that they release all of their hydrogen ions and have a greater effect on the pH.

For example, let's compare hydrochloric acid (HCl), a strong acid, and acetic acid (CH₃COOH), a weak acid. When HCl is added to water, it completely dissociates into H+ and Cl- ions, resulting in a large increase in the concentration of H+ ions and a large decrease in pH. However, when acetic acid is added to water, only a small fraction of the molecules dissociate into H+ and CH₃COO- ions, resulting in a smaller increase in the concentration of H+ ions and a smaller decrease in pH.

Learn more about weak acids at https://brainly.com/question/24018697

#SPJ11

The heat energy is required to cool 18 grams of steam at 118° to ice at -21° is 10,313.54 J. Option E is correct.

To solve this problem, we need to calculate the heat energy required to cool steam from 118°C to 0°C and then the heat energy required to freeze water at 0°C to ice at -21°C.

First, let's calculate the heat energy required to cool steam from 118°C to 0°C using the formula:

Q = mcΔT

where Q is the heat energy required, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

The specific heat capacity of steam is 2.01 J/g°C. Therefore, the heat energy required to cool 18 grams of steam from 118°C to 0°C is:

Q1 = 18 g × 2.01 J/g°C × (118°C - 0°C) = 4,309.64 J

Next, let's calculate the heat energy required to freeze water at 0°C to ice at -21°C using the formula:

Q = mlf

where Q is the heat energy required, m is the mass of the substance, and lf is the heat of fusion.

The heat of fusion of water is 333.55 J/g. Therefore, the heat energy required to freeze 18 grams of water at 0°C to ice at -21°C is:

Q2 = 18 g × 333.55 J/g = 6,003.9 J

Finally, we can add the two heat energy values to get the total heat energy required:

Q = Q1 + Q2

    = 4,309.64 J + 6,003.9 J

    = 10,313.54 J. Option E is correct.

The complete question is

how much heat energy is required to cool 18 grams of steam at 118 degree to ice at "-21" degree

a) 9,400 J

b) 14,200 J

c) 20,000 J

d) 43,200 J

e) 10,313.54 J.

To know more about the Energy, here

https://brainly.com/question/13193991

#SPJ4

1A.matter can neither be created nor be destroyed

6.balencing equation steps:--

balencing other than hydrogen nd oxygen

balencing oxygen

balencing hydrogen

balencing charge

Glycogen synthase forms an B)α-1,4-glycosidic bond upon release of UDP.

Glycogen synthase is an enzyme that catalyzes the formation of glycogen, a branched polysaccharide that serves as a storage form of glucose in animals. The enzyme adds glucose residues to the growing glycogen chain by forming α-1,4-glycosidic bonds between adjacent glucose molecules.

When the chain reaches a certain length, branching occurs through the formation of α-1,6-glycosidic bonds, catalyzed by the enzyme branching enzyme.

The release of UDP from glycogen synthase occurs after the addition of each glucose residue, and it is required for the enzyme to continue adding glucose residues to the growing glycogen chain. Therefore, glycogen synthase forms B) α-1,4-glycosidic bonds upon release of UDP.

For more questions like Enzymes click the link below:

https://brainly.com/question/31385011

#SPJ11

If the pressure on the system is increased and the temperature is kept constant, the system will shift towards the side with fewer moles of gas, which is the right side of the equation. As a result, (a) the amount of CO will increase, while the amounts of C and CO₂ will decrease.

If the pressure on the system is increased while keeping the temperature constant, Le Chatelier's principle can be applied to predict the result. According to Le Chatelier's principle, when a system at equilibrium is subjected to a stress, it will shift in a way that minimizes the effect of that stress.

In this case, increasing the pressure would be considered as a stress on the system. To minimize the effect of the increased pressure, the system will shift in the direction that reduces the total number of moles of gas molecules. This is because decreasing the number of gas molecules reduces the pressure.

Looking at the balanced equation provided:

Heat + C(s) + CO₂(g) ⇔ 2CO(g)

The total number of moles of gas molecules on the left side of the equation (C(s) + CO₂(g)) is 1, while on the right side (2CO(g)) it is 2.

Therefore, to reduce the total number of moles of gas and minimize the effect of increased pressure, the system will shift towards the right side of the equation, producing more CO. This means that the amount of CO will increase, while the amounts of C and CO₂ will decrease.

Hence, The correct answer is: (a) The amount of CO will increase, and that of C and CO₂ will decrease.

To know more about the Le Chatelier's principle refer here :

https://brainly.com/question/12067178#

#SPJ11

The correct choice is A) −5Δ[Br−]/Δt. The rate expressed as Δ[Br2]/Δt is proportional to -5 times the rate of change of Br−.

In the given reaction 5Br−(aq) + BrO3−(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(aq), the stoichiometric coefficients provide information about the relationship between the reactants and products. To determine the rate expressed as Δ[Br2]/Δt, we need to compare it with the rate of change of the other species.

Based on the balanced equation, for every 5 moles of Br− consumed, 3 moles of Br2 are produced. Therefore, the rate of change of Br−, Δ[Br−]/Δt, is related to the rate of change of Br2, Δ[Br2]/Δt, by a factor of -5/3.

The other choices, B) −0.6Δ[Br−]/Δt, C) 3Δ[BrO3−]/Δt, and D) −Δ[H2O]/Δt, do not correspond to the correct relationship based on the stoichiometric coefficients of the reaction. Therefore, the correct answer is A) −5Δ[Br−]/Δt.

for such more questions on reaction

https://brainly.com/question/24795637

#SPJ8

Answer:

it sucks up stuff,cleans around the house,and can be emptied

Explanation:

because its what it is spose to do

Answer:

a space entirely devoid of matter.

Explanation:

The reaction between 2-methyl-2-pentanol and sulfuric acid to yield 2-methyl-2-pentene goes via an elimination reaction

Elimination reactions are those that proceed by the removal of one or more atoms or functional groups from the reactants, resulting in the formation of a new double bond or π bond in a product. An example of an elimination reaction is the dehydration of alcohols.In this particular reaction, 2-methyl-2-pentanol (an alcohol) reacts with sulfuric acid to produce 2-methyl-2-pentene, which is an alkene.

The reaction mechanism proceeds via an elimination reaction, where the OH group and a hydrogen ion (H+) are removed from the reactant, resulting in the formation of a double bond between the adjacent carbon atoms in the product.The reaction can be represented as follows:CH3C(CH3)2CH(OH)CH3 + H2SO4 → CH3C(CH3)2C=CH2 + H2O + H2SO4In conclusion, the reaction between 2-methyl-2-pentanol and sulfuric acid to yield 2-methyl-2-pentene goes via an elimination reaction.

learn more about Elimination reactions

https://brainly.com/question/17101814

#SPJ11

Answer:

It's a metaphor. It's comparing Jordan and their emotions to a tornado

The answer to your question the equation of the line BC is C \(-7x - 5y = -48\)

Since AB and BC form a right angle at point B, it means that AB is perpendicular to BC.

To find the equation of BC, we first need to find the gradient of BC.

Let m be the gradient of AB and m' be the gradient of BC, since AB is perpendicular to BC, mm' = -1. Thus m' = -1/m

So, we need to find the gradient of AB and thus find the gradient of BC.

To find the gradient of AB, we use the equation for the gradient of a line in slope-point form. Having point A = (x₁, y₁) = (-3, -1) and point B = (x₂, y₂) = (4, 4).

\(m = \frac{y_{2} - y_{1} }{x_{2} - x_{1}}\)

Substituting the values of the variables into the equation, we have

\(m = \frac{4 - (-1) }{4 - (-3)}\)

\(m = \frac{4 + 1 }{4 + 3}\)

\(m = \frac{5}{7}\)

Since m' = -1/m

m' = -1 ÷ 5/7

m' = -7/5

Since we know the gradient of the line BC and the line BC passes through the point B = (4, 4) = (x₂, y₂) we find the equation of the line BC using the equation of a line in slope-point form.

\(m' = \frac{y - y_{2} }{x - x_{2}}\)

\(-\frac{7}{5} = \frac{y - 4 }{x - 4}\)

cross-multiplying, we have

\(-7(x - 4) = 5(y - 4)\)

Expanding the brackets, we have

\(-7x + 28 = 5y - 20\)

Subtracting 28 from both sides, we have

\(-7x = 5y - 48\)

Subtracting 5y from both sides, we have

\(-7x - 5y = -48\)

So, the equation of the line BC is \(-7x - 5y = -48\)

The answer to your question the equation of the line BC is C \(-7x - 5y = -48\)

Learn more about the equation of a line here:

https://brainly.com/question/12851029

Answer:

its C

Explanation:

To get a 30% solution of sulfuric acid, 4 oz of a 35% solution of sulfuric acid (and distilled water) must be mixed with 20 oz of a 20% solution of sulfuric acid.

A solution is a homogeneous mixture of two or more substances. For instance, two or more gases, or a gas and a solid, or a liquid and a solid, or two or more liquids could be mixed to create a solution.

First, determine the volume of sulfuric acid in each solution, then combine them to obtain the total amount of sulfuric acid. Solve the equation based on the sulfuric acid content in the final solution.

The volume of sulfuric acid in 35% solution is:

35% = 35/100

      = 0.35

V1 = volume of 35% solution of sulfuric acid and distilled water

V1 = 0.35 x V1

Suppose V2 is the volume of 20% solution of sulfuric acid, then

20% = 20/100

       = 0.2

V2 = volume of 20% solution of sulfuric acid

V2 = 0.2 x 20 oz

    = 4 oz

Let's combine the two solutions.

Total volume is (V1 + V2) ounces,

and the amount of sulfuric acid is 0.35V1 + 0.2V2 ounces.

The volume of sulfuric acid in the final mixture is:

30% = 30/100

        = 0.3

V1 + V2 = total volume

0.35V1 + 0.2V2 = total sulfuric acid volume

(0.3 x (V1 + V2)) = 0.35V1 + 0.2V2

V1 + V2 = 40

V1 = 4 oz

Substitute the value of V1 in the equation

V1 + V2 = 40(4 oz) + V2

             = 40 V2

              = 36 oz

To solve this problem, we can use the concept of the concentration of a solution, which is given by the amount of solute (in this case sulfuric acid) divided by the total amount of solution (sulfuric acid and water) multiplied by 100.

Or

Let x be the number of ounces of the 35% solution of sulfuric acid needed to make a 30% solution. We know that we have 20 ounces of a 20% solution. We can set up an equation based on the concentration of the sulfuric acid in the two solutions:

(0.35x + 0.20(20)) / (x + 20) = 0.30

Simplifying this equation, we get:

0.35x + 4 = 0.30x + 6

0.05x = 2

x = 40

Therefore, we need 40 ounces of the 35% solution of sulfuric acid to mix with the 20 ounces of the 20% solution to obtain a 30% solution.

Learn more about sulfuric acid: https://brainly.com/question/10220770

#SPJ11

A solution that has many ions in solution and turns pH paper orange is likely to be an acidic solution with a pH between 3 and 5.

The presence of many ions in solution indicates that the solution is likely to be a strong electrolyte, meaning that it contains a high concentration of ions that dissociate completely in water.

This could be due to the presence of a strong acid or a strong salt in the solution. The orange color on the pH paper indicates that the solution has a pH in the acidic range, which is consistent with the high concentration of H+ ions in an acidic solution.

Therefore, the solution can be classified as a strong acidic solution.

For more question on pH click on

https://brainly.com/question/172153

#SPJ11

The mass of NaCl produced is 0.117 g.

The pH of a solution is what tells us if the solution is acidic or basic. The solution is acidic if the pH of the solution is less than 7.

1) pH = - log(3.5 x 10^-5 M)

= 4.45

Thus the solution is acidic.

2) We can see that the concentration as given is the concentration of OH^-

[OH ] = 4.0 x 10^-3 M

pOH = -log (4.0 x 10^-3 M)

pOH = 2.39

pH = 14 -  2.39

pH = 11.61

The equation of the reaction is; \(NaOH + HCl ----- > NaCl + H2O\)

Number of moles of NaOH =  0.40 M * 10/1000 = 0.004 moles

Number of moles of HCl = 0.20 M  * 10/1000 = 0.002 moles

We can see that HCl is the limiting reactant

Mass of NaCl produced ;

0.002 moles * 58.5 g/mol = 0.117 g

Learn more about reaction:https://brainly.com/question/3588292

#SPJ1

Answer:

Explanation:

One

Pressure will favor the side with the least number of mols if it the larger number of moles counts only the gases. (Le Chetalier's Principle). In this case both CaCO3 and CaO are not soluble in water. The only gas is CO2. Since it represents the most number of mols the reactant is favored.

More or Less are very troublesome words in beginning science. Make sure you understand their meaning for this question. The more pressure applied, the more the reactants will be favored and the equation shifts left.

Two

Fe and Fe3O4 are both solids. It depends on the form that water takes. Looking it up, it is shown to be in a gas form. That means if you increase the pressure, nothing will happen. That is not your question, but you should note it.

The answer to your question is you increase the concentration of Fe or H2O, the equilibrium will shift right.

If you add more Fe3O4 or hydrogen it will shift left.

Chemists say that if you alter the equilibrium the equation will shift in the opposite direction to compensate for the action you have taken.

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

Ammonia is limiting reactant

Amount of oxygen left  = 0.035 mol

Explanation:

Given data:

Masa of ammonia = 2.00 g

Mass of oxygen = 4.00 g

Which is limiting reactant = ?

Excess reactant's amount left = ?

Solution:

Balance chemical equation:

4NH₃ + 3O₂     →     2N₂ + 6H₂O

Number of moles of ammonia:

Number of moles = mass/molar mass

Number of moles = 2.00 g/ 17 g/mol

Number of moles = 0.12 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 4.00 g/ 32 g/mol

Number of moles = 0.125 mol

Now we will compare the moles of ammonia and oxygen with water and nitrogen.

                       NH₃          :            N₂

                         4             :             2

                       0.12           :           2/4×0.12 = 0.06

                       NH₃         :            H₂O

                         4            :             6

                         0.12       :           6/4×0.12 = 0.18

                        O₂            :            N₂

                         3             :             2

                       0.125        :           2/3×0.125 = 0.08

                         O₂           :            H₂O

                         3              :             6

                         0.125       :           6/3×0.125 = 0.25

The number of moles of water and nitrogen formed by ammonia are less thus ammonia will be limiting reactant.

Amount of oxygen left:

                         NH₃          :             O₂

                            4            :              3

                            0.12       :          3/4×0.12= 0.09

Amount of oxygen react = 0.09 mol

Amount of oxygen left  = 0.125 - 0.09 = 0.035 mol

The statement that best explains the change in reaction time as the amount of water increases is that the concentration of the acid decreases. Option 4.

The rate of chemical reactions increases with an increase in the concentration of the reactants, all other things being equal.

When hydrochloric acid is diluted with water, its concentration decreases. A lower concentration of acid means that there are fewer acid particles available to react with the magnesium, so the reaction time increases.

This is consistent with the data table, where the reaction time increases as the amount of water increases.

Therefore, the correct answer is that the concentration of the acid decreases.

More on concentration and reaction rates can be found here: https://brainly.com/question/13764840

#SPJ1

When a racemic mixture reacts with a single enantiomer of another compound, then a pair of diastereomers are formed.

A racemic mixture is an equimolar composition of enantiomers are optically inert. On the right side and the left side of the enantiomer in a chiral molecule, they contain an equal amount.

Now, in an organic reaction:

When a racemic mixture reacts with a single enantiomer of another compound, two compounds are formed and their formation possesses the different configurations on each side. Hence, a pair of diastereomers are formed.

Learn more about racemic mixture here:
https://brainly.com/question/20358792

#SPJ1

Answer:

mu answer is A

Explanation:

i think it is a popular opinion because its the opinion of a country

Answer:

d i took the test

Explanation:

Answer:

this is really insightful, thank you

Explanation:

10.0 tonnes of TiO₂ can be produced at most from 19.0 tonnes of the mineral ilmenite, FeTiO₃. The first option is correct.

Utilizing the "mole concept," we may determine the mass of chemical substances according to the situation. A mole is a precise unit of measurement for the number of atoms or molecules in a large sample of the substance. It is the amount of a substance that includes precisely the Avogadro number of the substance's "elementary entities". It is practical to express the quantity of a substance using the mole concept.

For the given situation, first, write the complete equation,

\(\mathrm{FeTiO_3\longrightarrow FeO+TiO_2}\)

Then, the mole concept is introduced as,

\(\begin{aligned}\mathrm{\frac{mole\;of\;TiO_2}{mole\;of\;FeTiO_3}}&=\frac{1}{1}\\\mathrm{mole\;of\;TiO_2}&=\mathrm{mole\;of\;FeTiO_3}\\\mathrm{\frac{m_{TiO_2}}{79.9}}&=\frac{19.0}{151.7}\\\mathrm{m_{TiO_2}}&=\frac{79.9\times19.0}{151.7}\\&=\mathrm{10.00\;tonnes}\end{aligned}\)

The required answer is 10.0 tonnes.

To know more about mole:

https://brainly.com/question/15209553

#SPJ4

Further explanation

Given

25 moles of Oxygen(02)

Required The number of molecules

Solution Reaction

2NO+02 → 2NO2

From the equation,

mol NO2: = 2/1 x mol O2 = 2/1 x 25moles = 50 moles

The number of molecules :

\( = 50 \times 6.022 \times 10^{23}\)

\( = 3.011 \times 10{²5}\)