Pepsin functions normally in a low or high pH?

Answer:

the value of water is

6000

Answer:

600 or 6000 I'm not sure

^ tap to see the full pic

Explanation:

you make use of the formulas

amount(mol) = number of particles ÷ 6.02 × 10^23

and

mass(g) = amount(mol) × molar mass

Answer:

1 cubic centimeter

Explanation:

Answer:

milliliter is the same as cm^3

Explanation:

Asnwer: average atomic mass of chromium is 52amu

Calculations:

49.946amu: 4.350%= 0.0435

51.941amu: 83.790%= 0.8379

52.941amu: 9.500%= 0.095

53.939amu: 2.360%= 0.0236

Average atomic mass of chromium = 0.0435(49.946) + 0.8379(51.941) + 0.095(52.941) + 0.0236(53.939)

= 51.9963703amu

= 52 amu

Answer:

Chemical reaction is a reaction in which there is a change in the chemical composition and thus new substances are formed.

The characteristics of chemical reaction are :

1. Evolution of a gas

2. Formation of a precipitate

3. Absorption or evolution of heat

4. Change in colour

Answer:4,800

Explanation:

5 winks a minute, 60 minutes in an hour.

300 winks an hour, 16 hours a day.

4,800.

Answer:

The answer is 4,800 winks per day.

Explanation: There are 24 hours in a day, 24 minus the 8 hours shes asleep is 16. There are 60 minutes in an hour. 5 x 60 is 300. 300 winks an hour multiplied by the 16 hours she's awake is 4,800.

Al2(SO4)3 will have the greatest value of van 't Hoff factor, its solution would have the lowest freezing point. The correct option is A

Freezing point can be defined as the process when a liquid turns into a solid. Freezing point can also be occurs when heat is lost from an object which causes the molecules to slow down and form tighter bonds. One example of freezing point is when water turns into ice.

Therefore a freezing point may occurs when the molecules of a liquid slow down enough that their attractions cause them to arrange themselves into fixed positions as a solid.

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Activities like saving electricity, water, fuel, etc. decrease your carbon footprint.

Stop purchasing water in plastic bottles. Include some of your frequent short-trip destinations on a walking or bike route. When not in use, unplug electronics and turn off the lights. Eat less red meat and more locally produced foods. To save time and money, wash your items on the cold water cycle. Some of the things we can do to lessen our carbon impact include these.

Food, consumption, transportation, and household energy are the main sources of carbon footprints. The total amount of greenhouse gases (such as carbon dioxide and methane) produced by our actions is known as a carbon footprint. One of the highest rates in the world, the average carbon footprint of a person in the United States is 16 tons.

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If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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HBr's initial concentration was 0.375 M.

With the chemical formula HBr, HBr is a potent, colourless, and volatile inorganic acid that is also known as hydrobromic acid. It is an extremely caustic and reactive chemical that rapidly dissolves in water to produce a very acidic solution.

The volume and molarity of the KOH solution injected during the titration can be used to compute the concentration of the initial HBr solution. The number of moles of KOH added is equal to the number of moles of HBr in the starting solution and is calculated by multiplying the amount of KOH used in the titration (150 ml) by its molarity (0.5 M).

Therefore, 0.5 M * 150 ml = 75.0 moles can be used to compute the moles of HBr. Since the HBr solution's initial volume was 200 ml, the concentration can be determined by dividing the HBr molecular weight by the volume, which equals 75.0 moles / 200 ml = 0.375 M.

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Answer:

Therefore , \[0.528mol \times 6.022 \times {10^{23}}mo{l^{ - 1}} = 3.179 \times {10^{23}}\] molecules. Hence, \[3.179 \times {10^{23}}\] molecules are in \[75.0g\] of diphosphorus pentoxide \[{P_2}{O_5}\] .

Explanation:

I hope this helps because I have no idea what the hell this is lol.

When benzene is nitrated with a mixture of nitric and sulfuric acids, the electrophile that attacks the benzene ring is a nitronium ion, which has the chemical formula NO2+. This electrophile is generated in situ from the reaction between nitric acid and sulfuric acid, as shown below:

HNO3 + H2SO4 → NO2+ + HSO4- + H2O

The nitronium ion has a formal positive charge on the nitrogen atom (+1) and a formal negative charge on one of the oxygen atoms (-1), giving it an overall formal charge of 0. The three atoms that make up the nitronium ion are nitrogen (N), oxygen (O), and oxygen (O), arranged in a linear configuration. The nitrogen atom is the electrophilic center, as it is the site of positive charge and the atom that attacks the benzene ring in the nitration reaction.

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Answer:

what is the quetion.......

Explanation:

From the equation; there are three particles in solution.

The term freezing point is the temperature at which a liquid substance is converted to solid. We know that this is colligative property thus it depends on the number of particles in solution.

The dissolution of K₂S gives us;

K₂S(s) ----> 2K^+(aq)  + S^2-(aq)

This implies that there are three particles in solution.

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The type of container breach that has been documented as causing a BLEVE is runway cracking.

BLEVE stands for Boiling liquid expanding vapor explosion. BLEVE generally refers to the failure of a closed container as a result of over pressurization caused by an external heat source. More precisely the major failure of a closed liquid container into two or more pieces when the temperature of the liquid is well above its boiling point at normal atmospheric pressure.

Runway cracking is generally defined as the process by which heavy hydrocarbon molecules are broken up into lighter molecules by means of heat and usually pressure and sometimes catalysts. Hence, option C is correct.

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Once chewed and swallowed, the food will be digested and absorbed nutrients, while the rest of the food will be excreted through the body's feces. This digestion process can take about 24-72 hours.

The process of digestion of food in humans can be divided into two types, namely mechanical digestion and chemical (enzymatic) digestion. Mechanical digestion is the process of changing food from a large or coarse form to a smaller or finer form. The process takes place in the mouth with the help of teeth and tongue. The mechanical digestion process also occurs in the stomach with the help of peristaltic motion of the stomach wall, so that food is like being stirred. While the chemical digestion process is the process of converting food substances from complex forms into simpler forms with the help of digestive enzymes.

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When choosing a substance for use in a cooling system, we want a substance that can absorb a large amount of heat without undergoing a significant temperature change. This is where the specific heat capacity of a substance comes into play.

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of one unit of mass of the substance by one degree Celsius (or Kelvin). A substance with a high specific heat capacity requires more heat to raise its temperature by a certain amount than a substance with a low specific heat capacity. Therefore, a substance with a high specific heat capacity would be best for use in a cooling system.

Out of the options given, a liquid with a high specific heat would be the best choice for use in a cooling system. Liquids have a higher specific heat than gases, which makes them better at absorbing and storing heat. Additionally, liquids have a higher thermal conductivity than solids, which means they can more efficiently transfer heat from one location to another.

Moreover, among the liquids, water is a commonly used coolant due to its high specific heat capacity, which means it can absorb a large amount of heat without undergoing a significant temperature change. Additionally, water has a high boiling point, which makes it effective at absorbing heat from high-temperature sources without boiling and evaporating.

In summary, a liquid with a high specific heat, such as water, would be the best choice for use in a cooling system due to its ability to absorb and store heat efficiently.

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Explanation:

1-burning fossil fuels.

Sulfur dioxide released by the burning of fossil fuels like coal, petroleum is the major cause of air pollution.

Gases emitted from vehicles including trucks, jeeps, cars, trains, aeroplanes cause an immense amount of pollution.

2-Agricultural activities

Use of insecticides, pesticides and fertilizers in agricultural activities release harmful chemicals into the air and can also cause water pollution.

3-Exhaust from factories and industries

Manufacturing industries release a large amount of carbon monoxide, hydrocarbons, organic compounds, and chemicals into the air thereby depleting the quality of air.

Petroleum refineries release hydrocarbons and various other chemicals that cause air pollution.

4-Mining operations:

Mining is a process wherein minerals below the earth are extracted.

During this process dust and chemicals are released in the air causing massive air pollution.

The percent composition depicts the percent of an individual element by mass. The percent composition by mass is determined by the ratio of individual mass to the molar mass of the whole compound.

Mass percent composition is defined as the ratio of the mass of an element in a mole to the molar mass of a compound and multiplied by 100. This allows knowing the mass of an element in a compound or a molecule to the rest of the compound.

First, the molar mass of the whole compound is calculated by adding the individual masses and then used in an equation to get divided by the individual mass of the involved element.

The mass percent composition is given as,

% by mass = mass of element / molar mass of compound × 100%

Therefore, the mass percent composition involves the mass of the individual elements and molar mass.

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Based on the texts, both authors would most likely agree that Lewis's works are varied in the subjects they depict.

Option B is correct.

C. S. Lewis FBA has some notable works such as The Chronicles of Narnia, Mere Christianity The Allegory of Love, The Screwtape Letters, The Abolition of Man, The Space Trilogy Till We Have Faces Surprised by Joy: The Shape of My Early Life.

This statement indicates that Edmonia Lewis created works in a range of subjects, which is supported by her sculpting of both historical and contemporary figures, as well as mythological and biblical scenes.

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Answer:

200

Explanation:

Explanation:

take your weight times by the amount of newtons in a pound, which is 4.45

then convert newtons into grams.

The only situation where there is an increase in entropy;

The term entropy has to do with the degree of disorder in a system. Thus we must recall that gases tend to move very freely and the the gas does not have a particular or a fixed shape or volume. Hence, the level of the disorderliness would increase so much when a gas is produced.

The entropy is least when we have a solid because the particles that compose a solid are all held together in such a way that the particles do not move about freely in the system.

Thus, when there is an isothermal compression of the gas, the molecules of the gas collide more frequently with each other and entropy increases.

When a gas expands, it spreads out and entropy is reduced. When a glass of water looses energy, the molecules of the water would decrease in speed and entropy is reduced.

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Answer:

13.18

Explanation:

We'll begin by calculating the hydrogen ion concentration, [H⁺] in the solution. This can be obtained as follow:

HCl (aq) —> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl dissociate to produce 1 mole of H⁺.

Therefore, 0.15 M HCl will also dissociate to produce 0.15 M H⁺.

Thus, the concentration of the hydrogen ion, [H⁺] in the solution is 0.15 M.

Next, we shall determine the pH of the solution. This can be obtained as follow:

Concentration of the hydrogen ion, [H⁺] = 0.15 M.

pH =?

pH = – Log[H⁺]

pH = – Log 0.15

pH = 0.82

Finally, we shall determine the pOH of the solution. This can be obtained as follow:

pH = 0.82

pOH =?

pH + pOH = 14

0.82 + pOH = 14

Collect like terms

pOH = 14 – 0.82

pOH = 13.18

Therefore, the pOH of the solution is 13.18

The pOH of the solution is 13.18 when a solution of 0.15 M HCl (aq) is present.

The potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution.

Concentration of the hydrogen ion, [H⁺] = 0.15 M.

pH =?

pH = – Log[H⁺]

pH = – Log 0.15

pH = 0.82

Finally, we shall determine the pOH of the solution. This can be obtained as follow:

pH = 0.82

pOH =?

pH + pOH = 14

0.82 + pOH = 14

pOH = 14 – 0.82

pOH = 13.18

Therefore, the pOH of the solution is 13.18

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Answer:

SEE ATTACHMENT- GRADED AT 100%

Explanation:

Answer:

Atomic emission spectra are produced when excited electrons return to the ground state. When electrons return to a lower energy level, they emit energy in the form of light.

Explanation:

Chefs measure the number of ingredients they need before preparing foods for accuracy, consistency, and balancing flavors.

Measurements ensure accuracy and consistency in recipes. Cooking is a precise process, and precise measurements of ingredients are crucial for achieving the desired taste, texture, and overall outcome of a dish. By measuring ingredients, chefs can replicate their recipes consistently, ensuring that each dish turns out as intended.

Certain ingredients, such as spices, seasonings, and acids, can greatly impact the taste of a dish. By carefully measuring these ingredients, chefs can maintain a precise balance of flavors.

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