____________ helps digest proteins in the stomach. group of answer choices bile salt pepsin nahco3 pepsinogen trypsin

The slope of the straight line obtained from the plot of 1/[AB] versus time is equal to the rate constant (k) of the reaction. Therefore, k = 5.8×10−2 (M⋅s)−1.
The half-life (t1/2) of a reaction is the time required for the concentration of the reactant to decrease to half of its initial value. The relationship between the rate constant (k) and the half-life (t1/2) is given by the equation t1/2 = ln(2)/k.

Substituting the given values, t1/2 = ln(2)/(5.8×10−2) = 11.97 s.

Therefore, the half-life when the initial concentration is 0.55 M is 11.97 s.

To find the concentrations of A and B after 70 s, we first need to calculate the concentration of AB at that time.

We can use the equation ln([AB]0/[AB]) = kt, where [AB]0 is the initial concentration of AB, [AB] is the concentration of AB at time t, and k is the rate constant.

Substituting the given values, we get ln(0.220/[AB]) = (5.8×10−2)(70),

which gives [AB] = 0.094 M.

Now we can use the stoichiometry of the reaction to calculate the concentrations of A and B. For every mole of AB that reacts, one mole of A and one mole of B are produced.

Therefore, the concentration of A after 70 s is equal to the initial concentration of A plus the amount produced, which is equal to [A] = [A]0 + [AB]

= 0 + 0.220 − 0.094

= 0.126 M.

Similarly, the concentration of B after 70 s is equal to [B] = [B]0 + [AB]

= 0 + 0.220 − 0.094

= 0.126 M.

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Answer:

0.8338395752301793

Explanation:

I used an online converter (grams to moles for FeCl2)

If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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Answer:

B the change in mads of firewood

Explanation:

that's the answer

The type of earthquake you are referring to is called a tectonic earthquake. There are four different types of earthquakes, tectonic, volcanic, collapse and explosion. Tectonic earthquakes occur when there is movement along a fault line or crack in the Earths crust.

This movement causes large masses of rock to shift, resulting in seismic waves that can be felt on the surface. Tectonic earthquakes are the most common type of earthquake and are typically caused by the movement of tectonic plates. Tectonic earthquakes occur when large masses of rocks move due to a crack or a fault in the Earths crust. These movements are caused by the release of energy accumulated over time as a result of the movement of the Earths tectonic plates.

When the stress between the plates exceeds the strength of the rocks, the rocks break along a fault, causing the earthquake. The type of earthquake depends on the region where it occurs and the geological make up of that region. The most common are tectonic earthquakes.

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The relative abundance of the isotopes is 2.3137.

The relative abundance for a specific ion in the sample can be calculated by dividing the number of ions with a particular m / z m/z m/z ratio by the total number of ions detected.

Relative abundance = \(\frac{m}{z}\)

The atomic masses of Li are 6.941amu.

The atomic number of Li is 3

Relative abundance =  \(\frac{6.941}{3}\)

Relative abundance = 2.3137

The relative abundance of the isotopes is 2.3137.

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The isotopes have a relative abundance of 2.3137.

A species' relative abundance is determined by how many of that species there are in relation to all the other organisms in the area. Among the most well-known and extensively researched patterns in macroecology, relative species abundances frequently follow certain patterns.

Relative abundance = m/z

The atomic masses of Li are 6.941amu.

The atomic number of Li is 3

Relative abundance = 6.941/3

Relative abundance = 2.3137

The isotopes have a relative abundance of 2.3137.

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Answer:

There are three types of periods in the modern periodic table: very short periods, short periods, and long periods.

The difference between very short periods and short periods is the number of elements they contain. Very short periods only contain two elements, while short periods contain eight elements. The difference between short periods and long periods is the number of orbitals that can be occupied by electrons in each period. Short periods can only have electrons in the s- and p-orbitals, while long periods can also have electrons in the d-orbital.

Here is a table summarizing the differences between very short periods, short periods, and long periods:

Answer:

At the equator, Polaris would appear to sit right on the horizon. So if you travel to the north, the North Star climbs progressively higher the farther north you go.

If this is correct can i get Brainliest

Answer:

on the north horizon

Explanation:

hope this helps :)

Answer:

b) 1s22s22p63s23p5

Explanation:

Answer:

b) 1s22s22p63s23p5

Explanation:

edge 2021

In this question, we have to find the mass of Mn3(PO4)4, we will be using the molar mass of the compound, which is 544.7g/mol

544.7g = 1 mol

x grams = 3 moles

x = 1634 grams of Mn3(PO4)4

\(\\ \sf\longrightarrow Molarity=\dfrac{Moles\:of\:solute}{Volume\:of\: solution\:in\:L}\)

\(\\ \sf\longrightarrow Molarity=\dfrac{0.65}{0.05}\)

\(\\ \sf\longrightarrow Molarity=0.13M\)

The ion most commonly formed by fluorine is the fluoride ion (F-). This ion has a charge of -1, meaning it has gained an electron to form an anion.

Fluorine has a high electronegativity, meaning it is highly likely to attract an electron to complete its outer shell and become more stable. As a result, the fluoride ion is formed when fluorine gains an electron.

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Answer:

diffusion

Explanation:

is the movement of molecules from high concentration to low concentration.

The ground-state electron configuration of \(O^{2-}\) is [He]2s²\(2p^{6}\).\(2p^{6}\)

The ground state is the state in which an atom is in its lowest energy state. The ground-state electron configuration of \(O^{2-}\) is [He]2s²\(2p^{6}\).

Oxygen anion, also known as oxide anion, is formed when oxygen gains two electrons to attain a negative charge. The electronic configuration of oxygen before gaining the two electrons is 1s²2s²\(2p^{4}\).

When two electrons are added to oxygen, the resulting configuration becomes 1s²2s²\(2p^{6}\). However, to achieve a filled valence shell, the oxide ion has two additional electrons, resulting in a configuration of [He]2s²\(2p^{6}\).

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Based on the given information, it cannot be determined which unknown solution contained more copper(ii) sulfate. The experiments performed only involved a copper solution and did not provide any comparative measurements or quantities of copper(ii) sulfate in the unknown solutions. Therefore, further testing or analysis would be necessary to determine which unknown solution contained more copper(ii) sulfate.

To determine the amount of copper(II) sulfate in a solution, one could perform a quantitative analysis such as titration or gravimetric analysis. Without such experiments, it is impossible to determine which solution contained more copper(II) sulfate.The given information only suggests that there were two unknown solutions, and one of them contained copper(II) sulfate. Therefore, the only conclusion that can be made is that the copper solution contained copper(II) sulfate.

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With not knowing if the sandwich is  wrapped in plastic or not, I will explain and tell the answer with that.

Explanation: When he got his sandwich from his house from the counter, the sandwich has no protective bag or plastic wrapped around it, with this, the bread, meat, and possibly other ingredients were exposed to flys, and roaches. Other than that, the bread would mold like the meat with the high temps, if there is, the lettuce had turned brown looked destroyed as it were dehydrated  when lettuce has to stay cool and filled with its water not exposed to more warn elements than cool.

Answer: D: The chemical change sped up in his house when the temperature increased.

Answer:

Because something that experiences change in magnitude or the direction of the velocity is said to be acceleration .

Explanation:

b. The initial pressure was 3.75 atm.

Given,

T₁ = 299 K

P₂ = 7.77 atm

T₂ = 620 K

To find,

P₁ =?

The relation between pressure and temperature is given by Gay-Lussac's Law:

                                                          P ∝ T

                                                  P/T = constant

Therefore,

P₁/T₁ = P₂/T₂

Put the given values in the formula,

P₁/T₁ = P₂/T₂

P₁/299 = 7.77/620

P₁ = 3.75 atm

Hence, the initial pressure was 3.75 atm.

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Yes there will a chemical reaction.

What is chemical reaction ?

Chemical reaction, the process by which one or more substances (reactants) are transformed into one or more other substances (products). Substances are either chemical elements or compounds. Chemical reactions rearrange the constituent atoms of reactants to produce different substances as products.

Chemical reactions are an integral part of technology, culture, and even life itself. Fuel combustion, iron smelting, glass and pottery making, beer brewing, and wine and cheese making are just a few examples. Activities involving chemical reactions that have been around for thousands of years. Chemical reactions are abundant in a variety of complex processes that occur in Earth's geology, atmosphere and oceans, and in all biological systems.

Assume the solution A was acid and solution B was a base. When we'll mix both of them with each other, acid base reaction will occur. It'll lead to the formation of salt , which will get precipitated. So in this reaction, same thing happened . Any one of the solution is acid and other one is base. And when we mix them it undergo acid base reaction and formation of salt occurred which is red precipitation.

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sodium carbonate is a good looking compund available in physics laboratory so that we can microscope the rock cells

sunscreen with a protection factor of over 15, wear protective clothing that covers targeted areas of the skin, or just stay inside.

sunglasses also help prevent uv rays from damaging your eyes. it's also important to wear a hat since your head is directly in the way of the sun.

hope this helps!

Answer:

Explanation:

The graph shows the phase diagram of water . From it , it is clear that at 100°C water remains in equilibrium with water vapour and at this temperature , the vapour pressure is equal to one  atm . So this must be boiling point of water.

At 0.7 atm pressure , boiling point must have been reduced . So when water is at 100°C , it must have been completely in vapour phase .

Now the pressure is increased to 1.4 atm . In this process of increase of pressure , the water in vapour state must have turned into liquid state as soon as the pressure increases beyond  1 atm . Beyond it its boiling point would have increased above  100°C so it can not remain in gaseous phase . At 1.4 atm , its boiling point would have increased to 110°C or so . Hence it must be in liquid phase because its temperature is below its boiling point at that pressure .

Hence water changes from gaseous phase to liquid phase when pressure changes from 0.7atm to 1.4 atm .

To determine the number of grams of sulfur dioxide formed when 10.0 mol of copper(I) sulfide reacts during the process of roasting, we need to use the balanced chemical equation and the molar masses of the compounds involved.

The balanced chemical equation for the reaction of copper(I) sulfide (Cu2S) with oxygen (O2) to form copper(I) oxide (Cu2O) and sulfur dioxide (SO2) is:

2 Cu2S + 3 O2 → 2 Cu2O + 2 SO2

From the balanced equation, we can see that for every 2 moles of Cu2S, 2 moles of SO2 are formed.

Therefore, using the stoichiometry of the reaction:

10.0 mol Cu2S * (2 mol SO2 / 2 mol Cu2S) = 10.0 mol SO2

Next, we can calculate the mass of sulfur dioxide using the molar mass of SO2, which is approximately 64.06 g/mol:

Mass of SO2 = 10.0 mol SO2 * 64.06 g/mol

= 640.6 g

Therefore, when 10.0 mol of copper(I) sulfide reacts during roasting, approximately 640.6 grams of sulfur dioxide are formed.

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Answer : The correct option is (C) each picture represents an isotope of lithium because they each have 3 protons.

Explanation :

Isotope : It is defined as the element that have the same number of protons but have the different number of neutrons of each of the atom.

As in the given picture, the number of protons are same but number of neutrons are different.

As we know that atomic number is either equal to number of protons or electrons for neutral atom.

The number of protons in the given picture are 3.

So, the element will be lithium with atomic number 3 and all are the isotopes of lithium.

Hence, the correct option is (C) each picture represents an isotope of lithium because they each have 3 protons.

Acquisition is the learning process that occurs when a connection between a stimulus and a response is strengthened as learning begins.

Learning process are described as those processes people pass through to acquire new knowledge and skills and ultimately influence their attitudes, decisions and actions.  

These processes brings about what is called Classical conditioning, which is referred to as learning that occurs when a neutral stimulus (e.g., a tone) becomes associated with a stimulus (e.g., food) that naturally produces a behavior.

After the association is learned, the previously neutral stimulus is now very sufficient to produce the desired behavior.

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Answer:

Fluorine: non-metal

Bromine: non-metal

Hydrogen: non-metal

Beryllium: metal

Nitrogen:non-metal

We can see here that:

We see here that the bar graph will be more understandable if there is: A. Title.

Another thing that can aid in understanding the bar graph is: B. add pictures.

Using rectangular bars with heights or lengths proportional to the values they represent, a bar chart or bar graph displays categorical data. Both a vertical and a horizontal bar plot are possible. A column chart is another name for a vertical bar graph.

An appropriate question to guide Sarah's research will be: C. Which fixture uses the most water in our home?

To make this a real experiment, Sarah has to do the following: D. Collect and analyze data before and after the leaks are fixed.

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molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.