What is the rate law?

Answer:

look at the pic above

Explanation:

i hope u got it......

Answer:

its A -NH2 (vmxkgcjfxjfkhcfgk)

Answer:

Sugar solution seperation method is Distillation

iron power and sand separation method is Magnetic separation

petrol and diesel separation method is Fractional Distillation

camphor and galss powder seperation method is Sublimation

have a great day ❤️

Answer:

c

Explanation:

esuba is activation energy

Answer:

d.MgNa2+Cl2S

Explanation:

the reaction should balance on both sides

Answer:

it indicates how long it takes for the material to decay

Explanation:

hope this helps!

The half-life of a radioactive substance indicates how long it takes for the material to decay.

A half life is the amount of time it takes for half of a radioactive substance to decay.

Radioactive isotopes are defined as the isotopes which undergo decay processes very easily. They have very short half life. They are usually the isotopes of heavier elements.

Half life is defined as the time taken for the unstable isotope to fall to half its original value.

Hence, option C is correct.

Learn more about the half-life of a radioactive here:

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Answer:

Explanation:

yes

Answer:

It is a simple and clear account of the development of the codpuscular or, as sortie prefer to call it, the electronic, theory, of matter to explain the passage of electricity through metals and gases.

Explanation:

THE present volume is an expansion of six lectures delivered by; Prof. J. J. Thomson in his capacity of professor at: the Royal Institution. It is a simple and clear account of the development of the corpuscular, or, as sortie prefer to call it, the electronic, theory, of matter to explain the passage of electricity through metals and gases. The last two chapters are devoted to consideration of the properties of model atoms built up of corpuscles, and the evidence in favour of the view that the number of the corpuscles in an atom is about the same as its atomic weight in terms of hydrogen.

Answer:

A) Physical

B) Chemical

C) Chemical

D) Physical

E) Chemical

Explanation:

Physical changes are reversible while chemical changes are not.

Answer:

When the concentration of reactants is equal to the concentration of the products. [ when reaction rate is zero ]

Explanation:

This is only observed in a reversible reaction

[tex].[/tex]

Answer:

H = 6

O = 6

Fe = 3

Total atoms = 15

Explanation:

3Fe (OH)2

Fe = 1×3

O= 2× 3 = 6

H= 2× 3 = 6

Total atoms = 6+6+3=15

I hope I helped you^_^

hi, there!

The ancient atomic theory was proposed in the 5th century bc by the Greek philosophers Leucippus and Democritus

Given that, the sample of a substance who only oxidizable material is tin in the +2 state and we are meant to the determine the percentage composition of tin in the substance;

Then, the percentage composition of the tin in the substance is calculated as 172.84%

From the given information:

The molecular weight is the addition of all the atomic masses of a compound.

The molecular weight of K₂Cr₂O₇ is calculated as follows:

= (2 × 39.1) + (2 × 52) + (7 × 16)

= 294.2

The molecular weight of Sn²⁺ = 118.7

The oxidation half-reaction for Tin(ii) ion is as follows:

[tex]\mathbf{Sn^{2+}\to Sn^{4+}+2e^{-}}[/tex]

From the above equation, Tin (ii) ion oxidizes to Tin (iV) ion

The reduction of K₂Cr₂O₇ In the acidic medium, reduce Cr₂ to Chromium Cr³⁺.

[tex]\mathbf{K_2 Cr_2O_7 + 14H^{+}+6e^- \to 2K^+ + 2r^{3+} + 7H_2O}[/tex]

To calculate the percentage % of Tin in the sample, we must first know the Equivalent weight of each substance.

Calculating the equivalent weight (Eq. weight) of each substance in the samples, we have the following:

For K₂Cr₂O₇:

[tex]\mathbf{Eq. weight = \dfrac{molecular \ weight }{numbers \ of \ electrons \ lost \ or \ gained }}[/tex]

[tex]\mathbf{Eq. weight \ of \ K_2Cr_2O_7 = \dfrac{294.2 }{6}}[/tex]

[tex]\mathbf{Eq. weight \ of \ K_2Cr_2O_7 = 49.03 \ g/eq}[/tex]

[tex]\mathbf{Eq. weight \ of \ Sn^{2+} = \dfrac{118.7 }{2}}[/tex]

[tex]\mathbf{Eq. weight \ of \ Sn^{2+} =59.35 g/eq}[/tex]

The next step is to determine the Normality of the Solution.

Normality refers to the mole number per liter of the solution

[tex]\mathbf{Normality \ of \ K_2Cr_2O_7 = \dfrac{1.226 \ g }{49.03}\times \dfrac{1000}{250}}[/tex]

[tex]\mathbf{= \dfrac{4.904}{49.03} N}[/tex]

So, 23.90 mL of  [tex]\mathbf{ \dfrac{4.904}{49.03} N}[/tex] of K₂Cr₂O₇ is required to be present in the solution.

= [tex]\mathbf{=23.90 mL \times \dfrac{4.904}{49.03 } \ of \ Sn \ ion}[/tex]

Thus, the amount of Sn in the sample is calculated as:

[tex]= \mathbf{\dfrac{4.904}{49.03}\times \dfrac{59.35}{1000}\times 23.90 \ mL}[/tex]

= 0.1419 g

Finally, the percentage composition of tIn (Sn) in the sample is:

[tex]\mathbf{= \dfrac{0.1419}{0.0821}\times 100\%}[/tex]

= 172.84%

NOTE: A 0.0821g sample of the substance was given. Ideally, it should be 0.821g. But the calculation was based on the data given.

Therefore, from the above explanation, we can conclude that the percentage % of Sn in the sample is 172.84%

Learn more about Redox reactions here:

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Let it be x

[tex]\\ \sf\longmapsto \dfrac{3}{4}x=65[/tex]

[tex]\\ \sf\longmapsto x=65\times \dfrac{4}{3}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{260}{3}[/tex]

[tex]\\ \sf\longmapsto x\approx82[/tex]

Answer:

correct answer is A

Explanation:

The option which describes the particles of water as liquid water actively boils to become steam is: A. The particles will gain kinetic energy and increase temperature during boiling.

Water refers to a liquid molecule that is typically made up of two (2) main chemical elements; hydrogen and oxygen in the ratio of two (2) to one (1)  [2:1].

Generally, the boiling point of water is approximately at one hundred (100) degrees Celsius and at this temperature, water is typically converted into steam. This is usually as a result of the fact that, the particles of water gains more kinetic energy and an increase in temperature as it boils to become steam.

In conclusion, heating water causes its temperature to increase and the water molecules would gain kinetic energy as it actively boils to become steam.

Read more: https://brainly.com/question/19695951

Answer:  20g/(volume of water displaced)

Explanation:  Density = Mass/Volume  Once the volume of displaced water is known, divide the 20 grams by the volume.

Answer:

2160 days divided by 365 days which is a year is equal to about 5.9 years in school * sighhh*

5.91780821918

Answer:

HE coracle—as I had ample reason to know before I was done with her—was a very safe boat for a person of my height and weight, both buoyant and clever in a seaway; but she was the most cross-grained, lop-sided craft to manage. Do as you pleased, she always made more leeway than anything else, and turning round and round was the manoeuvre she was best at. Even Ben Gunn himself has admitted that she was "queer to handle till you knew her way."

Explanation:

[tex]\boxed{\sf {Ca(OH)_2(s)\atop Calcium\:Hydroxide}\longrightarrow {CaO(s)\atop Calcium\;oxide}+{H_2O(g)\atop water}}[/tex]

On reactant side

On product side

hence balanced.

Answer:

The new research suggests that Earth's water came from both rocky material, such as asteroids, and from the vast cloud of dust and gas remaining after the sun's formation, called the solar nebula.

Explanation:

Answer:

yes it is true they apply necessary safety measures

Answer: Label the test tubes, wear chemical protective gloves, tie long hair back

Explanation:

Just got it wrong

Answer:

which formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)?

» d.2 x molar mass of H + 2 x molar mass of O

Explanation:

Since we've two hydrogen atoms and two oxygen atoms, we multiply each mass by 2

[tex] = (2 \times hydrogen) + (2 \times oxygen) \\ = (2 \times 1) + (2 \times 16) \\ = 2 + 32 \\ = 34 \: g[/tex]

Which of the following statements best defines the actual yield of a reaction?

» d.The ratio of measured yield over stoichiometric yield

Answer:

electrons gain energy

Explanation:

Answer: 3.1149193

Explanation:

To calculate for the volume of a substance, simply get the ratio of the mass and density. Which is  volume = mass/density.

volume = 3.09/0.992 = 3.1149193

Answer:

right answer is option no c

Answer:

150 mL of 1.50 M HCL

Explanation:

So the equation you need to solve this equation is:

M1*V1=M2*V2 --> M1= Molarity of the acid you are diluting V1= Volume of the solution you need to dilute. M2=The molarity of thee solution you have made. V2=Volume of the solution you have made

M1= 1.50 M HCL

V1= Unknown

M2=0.450 M HCL

V2= 500 mL

Simple algebra says that V1= (1.5*500)/.450 = 150 mL of 1.50 M HCL