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laila [671]
3 years ago
6

A certain reaction has the following general form.

Chemistry
1 answer:
zhannawk [14.2K]3 years ago
6 0

Answer:

rate law = k [A]

Integrated rate law:  ln [A] = -kt + ln[A]₀

m =  -3.00 x 10⁻² Lmol⁻¹ s⁻¹

Explanation:

To determine the rate law we need to know the order of the reaction respect to the concentration of A.

In general, the rate law for a given equation is:

r= K [A ]^n

where rate , r ,  is the change in time of the concentration of A, and n is the order of the reaction.

So what we need to solve this question is find out which order of reaction conforms with the fact that a plot of 1/[A] versus time resulted in a straight line.

If zero order :

ΔA/Δt = - k [A]º = - k   ⇒ ΔA = - k Δt

From calculus:

∫ [A] d[A] = -∫ kdt   ⇒ [A] = -kt + [A]₀

A graph of this this equation will result in a straight line only graphing  [A] versus time, and not 1/[A] vs time as stated in the question.

If first order.

r = - k[A] ⇒ ΔA/Δt  = -k[A]

Δ[A]/[A] = -  kΔt

A plot of 1/[A] vs t will result in a straight, so we now know the reaction is first order.

from calculus we know that this integrated gives us:

∫d[A]/[A] = -∫k dt  

and the integral is:

ln [A] = -kt + ln[A]₀ where [A]₀ is the intial concentration of A.

you can see this equation has the form y = mx + b

So our reaction is first order, the integrated rate law is ln [A] = -kt + ln[A]₀ , and the values of the rate constant  is the negative of the slope:

m= -k ⇒ k = - m = -3.00 x 10⁻² Lmol⁻¹ s⁻¹

In case you are wondering about the units for k : we are plotting 1/[A] vs time so it follows k will have the units of L/mol per s.

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We are given with the mass of Arsine (AsH_{3}

The mass of arsine is 15g

there is a relation between moles, mass and molar mass of any compound which is

moles=\frac{mass}{molarmass}

The molar mass of Arsine = atomic mass of As + 3X atomic mass of H

the molar mass of Arsine = 74.92 + 3X 1 = 77.92 g/mol

Let us calculate the moles as

moles=\frac{15}{77.92}=0.192mol


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2 years ago
Which transition metals usually form only one monatomic cation? select all that apply.
lyudmila [28]

Zn, Cd, and Ag are transition metals that usually form only one monoatomic cation.

A monatomic cation is a cation made of only one atom.

Cations are positively charged ions, in this example Ag⁺, Cd²⁺ and Zn²⁺.

These cations form only one type of ion, while iron and copper form more than one type of cations.

Iron and copper form cations with different charges (Fe²⁺, Fe³⁺, Cu⁺, Cu²⁺).

It depends on electron configuration which type would be formed.

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Transition metals are elements in the d-block of the Periodic table.

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1) Well, you need to logically think about which of the pecan trees would be better. Tree 3 may have more clusters but they taste bitter so this is out of the option. So Tree 4 and Tree 1 would be best because they both have rich and buttery tastes and they both have a lot of clusters.

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4. Describe a solution and tell if the parts are mixed chemically or physically help please will give brainliest
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3 years ago
If a dog has a mass of 16.1 kg, what is its mass in the following units? Use scientific notation in all of your answers.
nekit [7.7K]

Answer:

16.1\times 10^3\ \text{g}

16.1\times 10^{6}\ \text{mg}

16.1\times 10^{9}\ \mu\text{g}

Explanation:

Mass of dog = 16.1\ \text{kg}

1\ \text{kg}=10^{3}\ \text{g}

1\ \text{kg}=10^{6}\ \text{mg}

1\ \text{kg}=10^{9}\ \mu\text{g}

So,

16.1\ \text{kg}=16.1\times 10^3\ \text{g}

16.1\ \text{kg}=16.1\times 10^{6}\ \text{mg}

16.1\ \text{kg}=16.1\times 10^{9}\ \mu\text{g}

Mass of the dog in the other units is 16.1\times 10^3\ \text{g}, 16.1\times 10^{6}\ \text{mg} and 16.1\times 10^{9}\ \mu\text{g}.

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2 years ago
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