The rate law of the overall reaction A + B → C is rate = k[A]2. Which of the following will not increase the rate of the reaction?

a. increasing the concentration of reactant B
b. adding a catalyst for the reaction
c. increasing the concentration of reactant A
d. increasing the temperature of the reactant
e. all of these will increase the rate

Answer:

405 [nm].

Explanation:

try this solution provided in the attachment.

From the balanced equation of the reaction, the coefficients of the reactants and products are 1:2:1.

A balanced equation of a chemical reaction is an equation which balances the atoms of each element on the reactants as well as the products side of a chemical reaction.

The balanced equation of the reaction that occurs when magnesium bromide is heated is shown below:

\(MgBr_2 \rightarrow Br_2+Mg \)

Therefore, the coefficients of the reactants and products are 1:2:1.

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Answer:

Cells go through the process of mitosis to make new cells.

Explanation:

 During mitosis, a parent cell splits into two new cells, the new cells are called daughter cells, which are copies of the original cells.

5. In order to properly balance a reaction you need to have the same amount of reactants and producs, on both sides. In the question we have the reaction:

PbO2 -> PbO + O2, which will be properly balanced by adding the following stoichiometric coefficients:

2 PbO2 -> 2 PbO + O2, therefore the balancing from the question is False

False

6. This reaction is one example of decomposition reaction, where a compound will be decomposed into two or more molecules or elements

Letter C

The equilibrium concentration of Br2 in the container will be 0.0376 M at 400 K.

Equilibrium concentration is described as a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction.

The reaction is given as :

Br2 + Cl2 ⇌ 2BrCl

The equilibrium constant expression for the above reaction is:

Kc = [BrCl]^2 / [Br2][Cl2]

Given initial moles of Br2 and Cl2, we can calculate their initial concentrations as follows:

[Br2] = 0.25 mol / 3.0 L = 0.0833 M

[Cl2] = 0.55 mol / 3.0 L = 0.1833 M

Assuming that x moles of Br2 react to form 2x moles of BrCl.

Therefore, the equilibrium concentrations of Br2, Cl2, and BrCl will be:

[Br2] = 0.0833 - x

[Cl2] = 0.1833 - x

[BrCl] = 2x

Kc = [(2x)^2] / [(0.0833 - x)(0.1833 - x)]

x = 0.0457 mol

In conclusion, the equilibrium concentration of Br2 is:

[Br2] = 0.0833 - 0.0457 = 0.0376 M

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Answer: For the given reaction \(Pb(NO_{3})_{2} + AlBr_{3}\) the products are \(PBr_{2} + Al(NO_{3})_{3}\).

Explanation:

A reaction in which two substances chemically combine together and results in the formation of a new substance is called a chemical reaction.

For example, \(3Pb(NO_{3})_{2} + 2AlBr_{3} \rightarrow 2Al(NO_{3})_{3} + 3PbBr_{2}\)

Products are the species that are written on the right side of an arrow in a chemical reaction equation.

Hence, we can conclude that for the given reaction \(Pb(NO_{3})_{2} + AlBr_{3}\) the products are \(PBr_{2} + Al(NO_{3})_{3}\).

Answer:

The [H⁺] for this soluton is 2*10⁻³ M

Explanation:

pH, short for Hydrogen Potential and pOH, or OH potential, are parameters used to measure the degree of acidity or alkalinity of substances.

The values ​​that compose them vary from 0 to 14 and the pH value can be directly related to that of pOH by means of:

pH + pOH= 14

In this case, pOH=11.30, so

pH + 11.30= 14

Solving:

pH= 14 - 11.30

pH= 2.7

Mathematically the pH is the negative logarithm of the molar concentration of the hydrogen or proton ions (H⁺) or hydronium ions (H₃O):

´pH= - log [H⁺] = -log [H₃O]

Being pH=2.7:

2.7= - log [H⁺]

[H⁺]= 10⁻² ⁷

[H⁺]=1.995*10⁻³ M≅ 2*10⁻³ M

The [H⁺] for this soluton is 2*10⁻³ M

The pH of the NaOH solution has been 2.7. The hydrogen ion concentration of the NaOH solution has been 1.9 \(\rm \bold{\times\;10^-^3}\) M.

The pH of the solution has been used for the determination of the Hydrogen ion concentration in the solution. The higher the hydrogen ion concentration, the pH will tend to be more towards the lower side.

The pOH has been the hydroxide ion concentration in the solution, The higher the hydroxide ion concentration, the more pH will move towards the higher range.

The sum of pH and pOH has been the constant quantity.

pH + pOH = 14

The given NaOH solution has pOH 11.30. The pH of the solution will be:

pH + 11.30 = 14

pH = 14 - 11.30

pH = 2.7.

The pH of the NaOH solution has been 2.7.

pH can be defined as the negative log of the hydrogen ion concentration.

pH = -log [\(\rm H^+\)]

2.7 = log [\(\rm H^+\)]

[\(\rm H^+\)] = \(\rm 10^-^2^.^7\)

[\(\rm H^+\)] = 1.9 \(\rm \bold{\times\;10^-^3}\) M

The hydrogen ion concentration of the NaOH solution has been 1.9 \(\rm \bold{\times\;10^-^3}\) M.

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Answer:

NO I DON'T ✌✌✌✌✌✌✌✌✌

Answer:

Bromine (BR2)

Explanation:

Cl2 + Br2 = ClBr

Answer:

d

Explanation:

il answer in comments if you brainly me

Answer:

It is used in the investigation of autoimmune neutropenia.

Explanation:

A glam test is used in the investigation of autoimmune neutropenia.

Autoimmune neutropenia is a reduced number of neutrophils resulting from increased peripheral destruction by antineutrophil antibodies from autoimmune disorders. 

—————

Please remember to revise this and make it in your own words if you want! I hope this helps you. -Doodle

—————

Links I used:

https://pubmed.ncbi.nlm.nih.gov/15387729/

https://sciendo.com/pdf/10.21307/immunohematology-2019-772

Answer: sweet home

Explanation:

Explanation:

phenolphthalein changes colour from transparent to pink in a basic solution. but in an acidic or a neutral solution it does not change colour. so if you put an unknown solution in phenolphthalein and it does not change colour then you cannot infer if it is acidic or neutral in nature.

There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.

The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.

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The term that refers to the passing of a wave through an object is "transmission."

Transmission refers to the process by which a wave passes through an object or medium. In the context of sound, transmission occurs when sound waves travel through different substances, such as air, water, or solids.

When a sound wave encounters an object, it can be transmitted through it, reflected off it, or absorbed by it, depending on the properties of the object and the medium through which the sound is traveling.

For example, when you speak into a microphone, the sound waves produced by your voice travel through the air and are transmitted to the microphone's diaphragm. The diaphragm converts the sound waves into electrical signals, which can then be amplified and reproduced as sound through speakers.

In summary, transmission is the term used to describe the passage of a wave, such as a sound wave, through an object or medium. It is an essential concept in understanding how waves interact with their surroundings and how sound propagates through different materials.

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Answer:

1

Explanation:

Mass of

C

a

C

N

2

= 75.0 g

From the equation,

C

a

C

N

2

(

s

)

+

3

H

2

O

(

l

)

→

C

a

C

O

3

(

s

)

+

2

N

H

3

(

g

)

1 mol of

C

a

C

N

2

reacts with 3 moles of water to give calcium carbonate and ammonia.

Number of moles of

C

a

C

N

2

,

n

=

G

i

v

e

n

m

a

s

s

M

o

l

a

r

m

a

s

s

Molar mass of

C

a

C

N

2

= 92.11 g/mol

Therefore,

n

C

a

C

N

2

=

75

g

92

.11

g

/

m

o

l

=

0

.814

m

o

l

Moles of water =Therefore,

n

C

a

C

N

2

=

75

g

92

.11

g

/

m

o

l

=

0

.814

m

o

l

Moles of water =

3

×

0

.814

m

o

l

e

s

=

2

.442

m

o

l

e

s

Mass of water needed;

=

m

o

l

e

s

o

f

w

a

t

e

r

×

m

o

l

a

r

m

a

s

s

o

f

w

a

t

e

r

=

2

.442

m

o

l

×

18

g

/

m

o

l

=

43

.956

g

Thus, 43.96 g of water is needed to react with 75 g of

C

a

C

N

2

.

Answer:

They are called coefficients.

Answer:

1940K and 1939K Isotopes are two forms of the same element that have different numbers of neutrons in the nucleus. This means same symbol, and same atomic number (subscript), but different mass number (superscript).

Answer:

There are 1.8021⋅1024 molecules of CH4 in 48 grams of CH4 .

Explanation:

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The method that can be used to separate the products of the reaction between aqueous lead(II) nitrate and aqueous potassium iodide is filtration (option D).

What is filtration?

Filtration is the mechanical separation of a liquid from the undissolved particles floating in it.

According to this question, a reaction occurs between aqueous lead (II) nitrate and aqueous potassium iodide as shown:

Pb(NO₃)₂(aq) + 2Kl(aq) → Pbl₂(s) + 2KNO₃(aq)

Based on the equation above, lead iodide is a solid product while pottasium nitrate is an aqueous solution.

Filtration is used to separate insoluble solid particles from liquid like the aqueous product, hence, it is a suitable separation technique.

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Answer:

Explanation:

Here, we want to get the half-life of the dryg

By definition, the half-life refers to the time taken for exactly half the mass of the sample to be lost

let us notice a pattern:

We have a decrease in from 20 mcg/ml to 10 mcg/ml in the first 5 hours, then we have a decrease from 10 mcg/ml to 5 mg/mcl in the second 5 hours

That simply means the half life of the drug is 5 hours

Two types of data that can be obtained from descriptive statistics include frequency distribution and variability in the data set. These data are calculated as the mean of standard deviation in the case of variation.

The relative importance of the science field of descriptive statistics is based on the obtention of statistically significant measurements in order to validate a hypothesis.

Therefore, with this data, we can see that the relative importance of the science field of descriptive statistics is based on testing working hypotheses.

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Answer:

Hydrogen

Explanation:

Answer:

half life=0.693/rate constant =188.3

The half-life of this element is 188.32 years

The formula for calculating the half-life of an element is expressed according to the equation:

\(t_{1/2}=\frac{ln 2}{\lambda}\)

Given the following parameters:

The rate constant for the decay = 3.68 × 10⁻³ day⁻¹.

Substitute into the formula for calculating the half-life as shown:

\(3.68\times 10^{-3}=\frac{0.693}{\lambda}\\ 0.00368=\frac{0.693}{\lambda}\\\lambda=\frac{0.693}{0.00368}\\\lambda = 188.32 years\)

Hence the half-life of this element is 188.32 years

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Answer: For the equilibrium that exists in an aqueous solution of nitrous acid (HNO2, a weak acid), the equilibrium constant expression is K = [ H+] [NO2-] / [HNO2].

Explanation:

An expression that depicts the ratio of products and reactants raised to the power of their coefficients at equilibrium is called equilibrium constant.

An equilibrium constant is denoted by the symbol 'K'.

For example, the dissociation of nitrous acid in aqueous solution is as follows.

\(HNO_{2} \rightleftharpoons H^{+} + NO^{-}_{2}\)

Hence, its expression for equilibrium constant is as follows.

\(K = \frac{[H^{+}][NO^{-}_{2}]}{[HNO_{2}]}\)

Thus, we can conclude that for the equilibrium that exists in an aqueous solution of nitrous acid (HNO2, a weak acid), the equilibrium constant expression is K = [ H+] [NO2-] / [HNO2].

Both an abiotic and biotic factor includes option B. A deer drinking from a stream.

In the case of a deer drinking from a stream, the biotic factor is the deer, while the abiotic factor is the stream. The stream provides water, which is essential for the survival of the deer, and it also provides a habitat for various aquatic organisms, such as fish, insects, and plants.

The deer, on the other hand, is a biotic factor as it is a living organism that relies on the stream as a water source. It may also feed on plants growing along the banks of the stream, which are also biotic factors. Therefore, the interaction between the deer and the stream represents a complex relationship between biotic and abiotic factors in an ecosystem.

It is essential to understand the interactions between biotic and abiotic factors in an ecosystem as they play a crucial role in maintaining the balance and stability of the environment. Changes in one component can have ripple effects throughout the ecosystem, affecting the entire food chain and the survival of various species. We can better manage and protect our natural resources by understanding these interactions. Therefore, the correct answer is option B.

The Question was Incomplete, Find the full content below :

Which includes both an abiotic and a biotic factor?

A. a chicken laying an egg

B. a deer drinking from a stream

C. a rock rolling down a hill

D. a squirrel eating an acorn

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Because the speed limit sign is in kilometres per hour and the driver is accustomed to miles per hour, no other cars are passing too quickly. The permitted speed is roughly 62 mph.

A regulatory sign is the speed limit sign. The purpose of speed limit signs is to inform drivers of the legal maximum and minimum speeds that are required of them. Drivers are not permitted to go over the limit stated by the sign.

When approaching or passing a troop, police, or military procession, or when driving past construction workers fixing roads, a motor vehicle's driver must travel at a pace of no more than 25 kph.

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Answer:

800.209

Explanation:

Answer:

Concentration of the sugar in the solution increases

Answer:

The sugar molecules will begin to crystallize back into a solid at the least provocation