Name three different properties you can test before and after a chemical reaction​

We are given:

half-life of carbon = 5715 years

Initial mass = 100 grams

Final mass = 12.5 grams

Finding the time taken:

Number of half-lives:

We know that in the relation:

[tex]\frac{Final\_mass}{Initial\_mass} = \frac{1}{2^{n}}[/tex], n is the number of half-lives taken

replacing the given values:

12.5 / 100 = 1/2ⁿ

1/8 = 1/2ⁿ

2ⁿ = 8

2ⁿ = 2³

n = 3

Hence, it took 3 half-lives to reduce the mass to 12.5 grams

Number of years:

Time taken = 3 half-lives

we know that one half-life is 5715 years, replacing that value:

Time taken = 3*(5715) years

Time taken = 17145 years

Therefore, after 17145 years, a 100 gram sample of carbon will decay and only 12.5 grams will remain

Answer: The solubility product of AgCl is [tex]10.73 \times 10^{-9}[/tex].

Explanation:

The reaction equation is as follows.

[tex]Ag_{2}CO_{3} \rightleftharpoons 2Ag^{+} + CO^{2-}_{3}[/tex]

Let us assume the concentration of [tex]2Ag^{+}[/tex] is 2S and concentration of [tex]CO^{2-}_{3}[/tex] is S. Hence, the expression for [tex]K_{sp}[/tex] of this reaction is as follows.

[tex]K_{sp} = [Ag^{+}]^{2}[CO^{2-}_{3}]\\8.2 \times 10^{-12} = (2S)^{2}(S)\\8.2 \times 10^{-2} = 4S^{3}\\S = 1.27 \times 10^{-4}[/tex]

This means that [tex][Ag^{+}][/tex] is [tex]1.27 \times 10^{-4}[/tex]. Now, the concentration of [tex]Cl^{-}[/tex] is calculated as follows.

[tex][Cl^{-}] = \frac{mass}{molar mass}\\= \frac{0.003 g}{35.5 g/mol}\\= 8.45 \times 10^{-5} M[/tex]

Hence,  [tex]K_{sp}[/tex] for AgCl is calculated as follows.

[tex]K_{sp} = [Ag^{+}] \times [Cl^{-}]\\= 1.27 \times 10^{-4} \times 8.45 \times 10^{-5}\\= 10.73 \times 10^{-9}[/tex]

Thus, we can conclude that solubility product of AgCl is [tex]10.73 \times 10^{-9}[/tex].

Answer: Alkanoate (plural alkanoates) (organic chemistry) Any salt or ester formed from the reaction of an alkaloic acid and alkaloids

Explanation: I looked in my dictionary and found this. I hope this helped

Answer:

what are the following units????

Explanation:

MY DOG WAS FAT BUT HE GOES TO GYM NOW, CAN BENCH LIFT 100 LBS :D

JK

Answer:

A glove is like the earth because...

A globe is like the earth in that it is a three-dimensional representation of the earth's features, such as countries, oceans, and landmasses.

A globe is also like the earth in that it can rotate on its axis, which allows the viewer to see different parts of the earth depending on the angle of rotation.

A globe is not like the earth because...

A globe is not like the earth in that it is typically much smaller than the earth.

A globe is also not like the earth in that it does not depict the earth's relief features, such as mountains and valleys, in their true proportion to the rest of the earth's surface.

A globe is like the earth in that it is a scaled-down, spherical model of the earth's surface, representing physical features accurately. However, a globe is not like the earth because it is much smaller and does not rotate or revolve.

The globe and the earth are similar in two main ways. First, a globe is a scaled-down model of the earth, showing an accurate representation of the earth's surface. This includes physical features such as continents, oceans, and countries, which are mapped out precisely. Second, a globe is spherical, just like the earth.

However, there are differences between a globe and the earth. One key difference is the scale: the earth is far larger than any globe. The most obvious point of difference is the size: while a globe is small enough to be held in your hands or placed on a desk, the earth has a diameter of approximately 7,917.5 miles. Also, the globe is a static object, it does not rotate on its axis or revolve around the sun like the earth does.

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The type of molecule shown in the image has been an alkyne. Thus option A is correct.

The molecules formed by hydrogen and carbon are hydrocarbons, These are the organic compounds with the sharing of electrons in between the atoms.

The number of electrons shared results in the bond formed. The compound with only a single bond has been alkane. The presence of sharing of 2 atoms results in a double bond, and the compounds are alkene. The triple bond compounds are alkynes.

The given structure has the presence of a triple bond in the structure, thus the image has been of an alkyne. Thus, option A is correct.

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Answer: 173 g ( 0.17 kg in right accuracy)

Explanation: Amount in moles is n = N/Na =  2.0·10^24 / 6.022·10^23 (1/mol).

n = 3.32116 mol. M(Cr) = 52.00 g/mol and  mass m = nM = 172.7 g

Answer: The value of [tex]K_{c}[/tex] for the given reaction is  [tex]K_{c} = \frac{[HI]^{2}}{[H_{2}][I_{2}]}[/tex] .

Explanation:

The ratio of concentration of products and reactants raised to the power of their concentration is called equilibrium constant.

It is denoted by the symbol [tex]'K_{c}'[/tex].

For example, [tex]H_{2} + I_{2} \rightarrow 2HI[/tex]

The expression for [tex]K_{c}[/tex] of this reaction is as follows.

[tex]K_{c} = \frac{[HI]^{2}}{[H_{2}][I_{2}]}[/tex]

So, by putting the respective concentrations of the species involved in the reaction it is possible to determine the value of [tex]K_{c}[/tex] for the given reaction.

Thus, we can conclude that the value of [tex]K_{c}[/tex] for the given reaction is  [tex]K_{c} = \frac{[HI]^{2}}{[H_{2}][I_{2}]}[/tex] .

Answer:

Ionic bond

Explanation:

An ionic bond holds positive and negative ions together.

Answer:

-533.68J

Explanation:

Using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat required (Joules)

m = mass of substance (g)

c = specific heat of substance (J/g°C)

∆T = change in temperature (°C)

According to the information provided in this question;

Q = ?

m = 28.3 g

c of iron = 0.449 J/g°C

∆T = 24°C - 66°C = -42°C

Using the formula, Q = m × c × ∆T

Q = 28.3 × 0.449 × (-42)

Q = -533.68

Q = -533.68J

This means that 533.68J is lost to the environment when iron of 28.3g cools from 66°C to 24°C.

The relationship between the calculated concentration of a material and the actual concentration of particles is known as the Van't Hoff factor.

I is the difference between a typical or theoretical colligative quality and an observable one.

The van 't Hoff factor is the difference between the concentration of a material determined by its mass and the concentration of particles actually formed when the substance is dissolved. The van 't Hoff factor is virtually 1 for the majority of non-electrolytes dissolved in water.

For dissociation, association, and the non-electrolyte solute, the Van't Hoff factor value is more than one, less than one, and equal to one respectively.

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Answer:

What are you talking abt

Explanation:

Answer:

D

Explanation:

chemical properties

I'm not sure abt it but hope that helps

To solve this we must be knowing each and every concept related to hybridisation. Therefore, the hybridisation of the given molecule can be given as below.

Only during bond formation does hybridization occur, not in an individual gaseous atom. If the bonding of a molecule is known, the geometry of the molecule may be predicted.

compound                                                              hybridisation

Carbon dioxide (0 = C = O)                                       sp

Propene (CH[tex]_3[/tex]CH = CH[tex]_2[/tex])                                            sp³, sp²,sp²

Formaldehyde (H[tex]_2[/tex]C = O)                                             sp²

Acetone [(CH[tex]_3[/tex] )[tex]_2[/tex] C = O                                                 sp³, sp²,      sp³

Ketene (H[tex]_2[/tex]C = C = O)                                                  sp²,    sp

Therefore, the hybridisation of the given molecule can be given as above.

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Answer: adioisotopes, are species of chemical elements that are produced through the natural decay of atoms. Exposure to radiation generally is considered harmful to the human body, but radioisotopes are highly valuable in medicine, particularly in the diagnosis and treatment of disease.

Explanation:

Explanation:

5 lollipops = 6 gumballs

8 gumballs = 6 lemonheads

14 lemonheads = 11 lollipops

It is in chain rule form.

Answer:

야만적 인 사랑은 누군가가 천사처럼 보이지만 야만적 인 사랑은 당신의 마음을 부러 뜨리게했다너무 귀엽다

Explanation:

난 천사야 네가 무슨 뜻인지 말해줘나는 모든 것을 가지고 나는 그것을 다시 포기하지 않을 것이다

Answer:D wind

Explanation:

Most energy resources used by humans are nonrenewable. Wind is not  a nonrenewable energy resource. Therefore, option D is correct.

Energy derived from fossil fuels including coal, crude oil, natural gas, and uranium is referred to as non-renewable energy. Non-renewable energy requires human intervention to make it appropriate for use, in contrast to renewable energy.

Fossil fuels made of carbon are one instance. With the use of heat and pressure, the original biological substance transforms into a fuel like gas or oil.

A renewable energy source is wind power. Water does not pollute, it cannot run out, and it lessens the need for fossil fuels, which are where greenhouse gases that contribute to global warming are produced.

Thus, option D is correct.

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Answer:

255.46 grams NO3

Explanation:

The molar mass of NO3 is 62.0049 g/mol.

To get grams from moles, multiply the moles by the molar mass.

4.12*62.0049 = 255.4602 = 255.46 grams NO3

Answer: The molarity of this solution is 0.159 M.

Explanation:

Given: Mass of solute = 16.3 g

Volume = 1.75 L

Number of moles is defined as the mass of substance divided by its molar mass.

Hence, moles of NaCl (molar mass = 58.44 g/mol) ar calculated as follows.

[tex]Moles = \frac{mass}{molar mass}\\= \frac{16.3 g}{58.44 g/mol}\\= 0.278 mol[/tex]

Molarity is the number of moles of a substance present in a liter of solution.

So, molarity of the given solution is calculated as follows.

[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.278 mol}{1.75}\\= 0.159 M[/tex]

Thus, we can conclude that the molarity of this solution is 0.159 M.

Answer:

sorry i didn't understand your question can you explain me your question have a good day hope its helps you ☺

Answer:

C: The products react to re-form the original reactants.

Explanation:

A reversible reaction is one where the conversion of reactants to products as well as the conversion of products to reactants happen at the same time.

What this means is that the products of the reaction could react to reform the initial reactants.

Thus, option C is the correct answer.

Answer:

C

Explanation:

The products react to re-form the original reactants.

Answer:

no se englesh

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Answer:

Thus, the pollutant concentration in lake will be reduced to 0.2% after 6.931471 days

Explanation:

From the information given:

A(t) = amount of pollutant for time (t)

A 4 billion cubic ft is the same as 4000 million cubic ft:

∴

The Initial amount of pollutant is [tex]A_o = (\dfrac{0.4}{100})\times 4000[/tex]

[tex]A_o = 16 \ million \ cubic \ feet[/tex]

However;

the pollutant rate (input) = 400 × 0 = 0

the pollutant rate (output) = [tex]400( \dfrac{A(t)} {4000})[/tex]

[tex]= 1( \dfrac{A(t)} {10})[/tex]

The net rate = [tex]A'(t) = 0 - 1( \dfrac{A(t)} {10})[/tex]

[tex]\implies A'(t) = - 1( \dfrac{A(t)} {10})[/tex]

[tex]\implies \dfrac{1}{A(t)}A'(t) = -(\dfrac{1}{10})[/tex]

[tex]\implies \int (\dfrac{1}{A(t)}A'(t) ) dt = \int -(\dfrac{1}{10}) dt[/tex]

[tex]\implies In (A(t)) = -(\dfrac{1}{10})t + c[/tex]

[tex]\implies A(t) = e^{-(\dfrac{1}{10})t+c}[/tex]

[tex]\implies A(t) = Ce^{-\dfrac{1}{10}^t}[/tex]

A(0) =  16

[tex]\implies Ce^{ -(1/20)^0} = 16 \\ \\ C = 16[/tex]

[tex]\implies A(t) = 16e^{(-1/10)t}[/tex]

[tex]0.2\% \ pollutant = (\dfrac{0.2}{100})*4000 =8 \ million \ cubic \ feet[/tex]

A(t) = 8

[tex]\implies 16e^{(-1/10)t}= 8 \\ \\ \implies e^{1/10)t} = 2 \\ \\ (\dfrac{1}{10} )^t = In(2) \\ \\ t = 10\ In(2) \\ \\ \mathbf{ t = 6.931471}[/tex]

Salts are heated to extremely high temperatures during a display of fireworks. The salts' ions pick up energy and get excited. Exciting hues are created as energy in the form of light is emitted from the ions. Each salt's metal ion can be identified by the hue of the light that is emitted.

Subatomic particles refer to the three fundamental particles that make up the atom.

The subatomic particles include:

Electrons occupy several energy states. When electrons gain energy, they move to a higher energy state. The electrons on returning to a lower energy state emit radiation that is seen as several light color displays in fireworks.

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Answer:

HCl is not a catalyst because these are not used up during the chemical reactions.

Explanation:

Hello there!

In this case, according to the performed experiments, it is possible for us to realize that HCl cannot be a catalyst for this reaction because it is used up during the reaction. This is explained by the fact that catalyst are able to return to the original form once the reaction has gone to completion; this is the example of palladium in the hydrogenation or dehydrogenation of hydrocarbons depending on the case. Moreover, we know that the catalysts increase the reaction rate because they decrease the activation energy of the reaction and therefore the student observed such increase.

Best regards!

Answer:

They are 4 short column on the periodic table