3) A certain reaction has the following general form: A + B à AB At a particular temperature the concentration versus time were collected for this reaction, and a plot of ln[A]t versus time resulted in a straight line with a slope of −3.7 x 10−3 s−1. Show your math! (5 points) a. What is the order of the reaction? b. What is the rate constant (including units)? c. Calculate the half-life for the reaction. d. If the initial concentration of A is 0.250 M, what is the concentration after 220 seconds?

Answer:

So when a cat puts up its middle finger its usually trying to scare you off.

Explanation:

it's gonna kill you.

Answer:

A

Explanation:

Answer:

95.7 g CO to the nearest tenth.

Explanation:

2C + O2 ---> 2CO

Using relative atomic masses:

24 g C produces  2*12 + 2*16 g CO.

So 41 g produces  ( (2*12 + 2*16) * 41  ) / 24

= 95.7 g CO,

Answer:

If Earth were to change its orbit – maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull – it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun.

Explanation:

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Explanation:

If Earth were to change its orbit – maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull – it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun.

The activation energy of the reaction is positive when a reaction release energy.

Chemical reactions that release energy are called exothermic.

Exothermic reaction is the reaction that release energy during the formation of bonds in the products.

Energy is released when bonds are formed in products compare to the reactants.

Therefore, activation energy of the reaction is positive because it is the energy that is needed to break barriers for reaction to start and it release chemical energy during reaction.

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Answer:

An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes.

Answer:

neutral

Explanation:

pH is usually (but not always) between 0 and 14. Knowing the dependence of pH on [H +], we can summarize as follows: If pH < 7, then the solution is acidic. If pH = 7, then the solution is neutral

The Medal of Honor is the best navy decoration and highest volume.

The President of the USA The Victoria go is the holy grail for Medal of Honor creditors because there are the best in lifestyles. Bearing the inscription For valor and called a VC, this medal turned into first offered for conspicuous bravery' in 1856 and later backdated to the Crimean conflict of 1854. The outstanding service pass is the second maximum army ornament that may be provided to a member of the American military, for intense gallantry and risk of lifestyle in actual combat with an armed enemy force.

The Bronze Star Medal dates lower back to world battle II. these days, it is the fourth-maximum ranking award a provider member can obtain for a heroic and meritorious deed performed in an armed battle. For individuals who acquire the BSM, it's far a sign of their sacrifice, bravery, and honor at the same time as serving their us of a

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Answer:

NHCOR

Explanation:

In electrophilic aromatic substitution, certain substituents on the aromatic ring such as

-NHCOR are known to enhance ortho-para substitution. These ortho-para activating groups stabilizes the intermediate cation.

These ortho-para activating groups usually consists of species that donate electron density towards the reaction centre thereby stabilizing the carbocation and making the reaction faster.

Answer:

Acids and bases can help neutralize each other.

Acids turn litmus paper red, bases turn it blue.

Strong bases can be slippery and slimy feeling.

Acids taste sour, bases taste bitter.

Proteins are made up of amino acids.

Vitamin C is also an acid called ascorbic acid.

Ammonia is a base chemical.

Explanation:

school

I just did this for my class.

Here are 10 facts about acids and bases to help you learn about acids, bases, and pH along with a chart for comparison.

1. Any aqueous (water-based) liquid can be classified as an acid, base, or neutral. Oils and other non-aqueous liquids are not acids or bases.

2. There are different definitions of acids and bases, but acids can accept an electron pair or donate a hydrogen ion or a proton in a chemical reaction, while bases can donate an electron pair or accept hydrogen or a proton.

3. Acids and bases are characterized as strong or weak. A strong acid or strong base completely dissociates into its ions in water. If the compound does not completely dissociate, it's a weak acid or base. How corrosive acid or a base does not relate to its strength.

4. The pH scale is a measure of the acidity or alkalinity (basicity) or a solution. The scale runs from 0 to 14, with acids having a pH less than 7, 7 being neutral, and bases having a pH higher than 7.

5. Acids and bases react with each other in what is called a neutralization reaction. The reaction produces salt and water and leaves the solution closer to a neutral pH than before.

6. One common test of whether an unknown is an acid or a base is to wet litmus paper with it. Litmus paper is a paper treated with an extract from a certain lichen that changes color according to pH. Acids turn litmus paper red, while bases turn litmus paper blue. A neutral chemical won't change the paper's color.

7. Because they separate into ions in water, both acids and bases conduct electricity.

8. While you can't tell whether a solution is an acid or a base by looking at it, taste and touch may be used to tell them apart. However, since both acids and bases can be corrosive, you shouldn't test chemicals by tasting or touching them! You can get a chemical burn from both acids and bases. Acids tend to taste sour and feel drying or astringent, while bases taste bitter and feel slippery or soapy. Examples of household acids and bases you can test are vinegar (weak acetic acid) and baking soda solution (diluted sodium bicarbonate -- a base).

9. Acids and bases are important in the human body. For example, the stomach secretes hydrochloric acid, HCl, to digest food. The pancreas secretes a fluid rich in the base bicarbonate to neutralize stomach acid before it reaches the small intestine.

10. Acids and bases react with metals. Acids release hydrogen gas when reacted with metals. Sometimes hydrogen gas is released when a base reacts with a metal, such as reacting sodium hydroxide (NaOH) and zinc. Another typical reaction between a base and a metal is a double displacement reaction, which may produce a precipitate metal hydroxide.

The frequency of gamma radiation is calculated to be = 1.11 *10^20 Hz.

A gamma radiation is also known as gamma ray. It is a penetrating form of electromagnetic radiation arising from radioactive decay of atomic nuclei. It consists of shortest wavelength electromagnetic waves, even shorter than X-rays.

Gamma rays can pass through the human body completely and as they pass through, they cause ionizations that damage tissue and DNA.

As we know that E= hf

Hence, f= E/h

Given E=  6.96 x 10-14 J

And, Planck's constant, h = 6.626 *10^-34 m² kg/s

f = 6.96 * 10^-14J  +/6.626 *10^-34

f = 1.11 *10^20 Hz

Hence, frequency of gamma radiation = 1.11 *10^20 Hz.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Answer:

Sedimentary

Explanation:

The number of moles of the gas can be determined using ideal gas equation. The number of moles of Br gas in 2.8 L at 1.38 atm and 327 K is 0.144 moles.

Ideal gas law states the relation between temperature, pressure and volume with the number of moles of a gas as written below:

PV = nRT

where, R is the universal gas constant equal to 0.082 L atm/K mol

Given that, T = 327 K

P = 1.38 atm

V = 2.8 L.

Then, n = PV/RT

Number of moles of Br gas, n = (1.38 atm ×2.8 L)/(327 K × 0.082 L atm/K mol ) = 0.144 moles.

Therefore, the number of moles of Br gas in in 2.8 L at 1.38 atm and 327 K is 0.144 moles.

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Answer:

3.12 x 25.6 = 79.9 g

Writing and balancing complex half-reactions in acidic solutions involves a systematic approach. Here are the general steps to follow:

Identify the oxidation and reduction half-reactions: Determine which species is being oxidized (losing electrons) and which is being reduced (gaining electrons).

Balance the atoms: Begin by balancing all atoms except hydrogen and oxygen in each half-reaction.

Balance the charges: Add electrons (e-) to one side of each half-reaction to balance the charges.

Balance the oxygen atoms: Add water (H2O) to the side of the equation that lacks oxygen atoms.

Balance the hydrogen atoms: Add hydrogen ions (H+) to the side of the equation that lacks hydrogen atoms. Keep in mind that the solution is acidic.

Balance the charges: Adjust the number of electrons (e-) on each side of the equation to ensure that the charges are balanced.

Multiply the half-reactions: Multiply each half-reaction by an appropriate factor so that the number of electrons gained and lost are equal.

Combine the half-reactions: Add the two balanced half-reactions together and cancel out common terms on both sides of the equation.

By following these steps, you can effectively write and balance complex half-reactions in acidic solutions, ensuring that the overall reaction is balanced in terms of both atoms and charges.

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Answer: Mass is converted to the energy binding a nucleus together.

Explanation: a p e x

Mass is converted to the energy binding a nucleus together cause a mass defect.Hence , Option (C) is correct.

The actual atomic mass is less than the predicted mass calculated by adding the masses of nucleons.

This additional mass is accounted for by binding energy that is released when a nucleus is formed.

When a nucleus is formed, some of the mass is converted to energy and this results in the mass defect.

Therefore, Mass is converted to the energy binding a nucleus together cause a mass defect. Hence , Option (C) is correct.

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Answer:

8 ATM

Explanation:

P1 V1 = P2 V2

P1 V1 / V2 = P2

1 * 2 / .25 = 8 ATM

This is an exercise of Equation of state of an ideal gas.

To start solving this exercise, we obtain the following data:

The gas law is derived from the gas law of Boyle, Charles, Gay Lussac and General.

This means that if the volume is doubled the pressure is reduced by half, and if the pressure is made three times greater, the volume will be one third of what it was originally which can be summarized in the equation.

P₁V₁=P₂V₂ ⇒ General Formula

Where:

The word inversely proportional means: "That if the pressure increases the volume decreases but proportionally".

We clear formula for final pressure:

\(\bf{P_{2}=\dfrac{P_{1}V_{1}}{V_{2}} \ \ \to \ \ \ Formula }\)

We clear our data in the formula:

\(\bf{P_{2}=\dfrac{(1.0 \ atm)(2.0\not{l})}{0.25\not{l}} }\)

\(\bf{P_{2}=8 \ atm}\)

If the volume is reduced to 0.25 liters, the new pressure of the gas will be 8 atm.

The best explanation for the increase in the number of plants with long, narrow flowers over time is option D: Individuals with long, narrow flowers produce more seeds than individuals with short, wide flowers.

In this population, short, wide flowers are better suited for bee pollination, while long, narrow flowers are more suitable for hummingbird pollination. Over time, the plants with long, narrow flowers produce more seeds compared to those with short, wide flowers.

This happens because the hummingbirds, which are the main pollinators for long, narrow flowers, are more effective in transferring pollen between these flowers. As a result, the long, narrow flower individuals have a higher reproductive success and pass on their traits to the next generation

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There are approximately 0.00493 moles of N in 0.217 g of N2O.

To determine the number of moles of N in 0.217 g of N2O, we need to convert the mass of N2O to moles using the molar mass of N2O, which is 44.0128 g/mol. We can use the formula:

moles = mass / molar mass

So, moles of N = 0.217 g / 44.0128 g/mol = 0.00493 mol. Therefore, there are approximately 0.00493 moles of N in 0.217 g of N2O.

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Answer:

Although they receive a bad rap from the media and pharmaceuticals, the majority of prokaryotes are either harmless or actually help eukaryotes, such as animals and plants, to survive and only a small number of species are responsible for serious illnesses.

Explanation:

The gradient of a graph shows the slope or rate of change. The graph here shows the relationship between the volume (V) and the absolute temperature (T) of a gas when the gas is kept at a constant pressure.

PV = nRT,

where

P is the pressure,

V is the volume,

n is the number of moles of the gas,

R is the ideal gas constant, and

T is the absolute temperature, the formula for the ideal gas law.

The ideal gas law can be rewritten as V = (nR/P)*T if pressure (P) is constant, volume (V) is plotted on the y-axis, and absolute temperature (T) is is plotted on the x-axis. Axis.

We can see that the gradient (m) of the graph in this equation represents (nr/p) by comparing it to the equation for a straight line, y = mx + c, where y is the dependent variable (V), x is the independent variable. variable (T), m is the gradient, and c is the y-intercept.

So, the correct option is B.

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The characteristic of reactions that depends on valence electrons is the bond type.

In chemistry, a chemical bond could be;

The type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.

When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.

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Answer:

D: bond number

As the concentration of CO rises, the product's concentration, CO2, rises (), while the reactants' concentrations, CO(g) and O2(g), decline ().

Growing CO2 concentration: As CO(g) and O2(g) concentrations rise, CO(g) and O2(g) concentrations fall, and CO(g) and CO(g) concentrations, respectively, are reduced.

lowering the system's volume: The concentration of the reaction's reactants, CO(g) and O2(g), falls (), while the concentration of the product, CO2(g), increases (). Le Chatelier's principle states that for every chemical reaction in equilibrium, a change in the volume or concentration of any chemical species will cause the equilibrium of the reaction to shift in a way that minimizes the impact of the change. as follows: 2CO(g) + O2(g) 2CO2 (g).

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