calculate the number of atom of each element : ​

Answer:

An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure.

setup 1 : to the right

setup 2 : equilibrium

setup 3 : to the left

The reaction quotient (Q) : determine a reaction has reached equilibrium

For reaction :

aA+bB⇔cC+dD

[tex]\tt Q=\dfrac{C]^c[D]^d}{[A]^a[B]^b}[/tex]

Comparing Q with K( the equilibrium constant) :

K is the product of ions in an equilibrium saturated state  

Q is the product of the ion ions from the reacting substance  

Q <K = solution has not occurred precipitation, the ratio of the products to reactants is less than the ratio at equilibrium. The reaction moved to the right (products)

Q = Ksp = saturated solution, exactly the precipitate will occur, the system at equilibrium

Q> K = sediment solution, the ratio of the products to reactants is greater than the ratio at equilibrium. The reaction moved to the left (reactants)

Keq = 6.16 x 10⁻³

Q for reaction N₂O₄(0) ⇒ 2NO₂(g)

[tex]\tt Q=\dfrac{[NO_2]^2}{[N_2O_4]}[/tex]

Setup 1 :

[tex]\tt Q=\dfrac{0.0064^2}{0.098}=0.000418=4.18\times 10^{-4}[/tex]

Q<K⇒The reaction moved to the right (products)

Setup 2 :

[tex]\tt Q=\dfrac{0.0304^2}{0.15}=0.00616=6.16\times 10^{-3}[/tex]

Q=K⇒the system at equilibrium

Setup 3 :

[tex]\tt Q=\dfrac{0.230^2}{0.420}=0.126[/tex]

Q>K⇒The reaction moved to the left (reactants)

Answer:

The system will shift toward the products

The system is at equilibrium

The system will shift toward the reactants

Explanation:

This is correct on edg... Good Luck!!!!

Answer:

dalton

Explanation:

believe his first name is james, if your not to sure search it

Answer:

Hope it helps:)

Explanation:

Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave. This means the longer the wavelength, lower the frequency. ...

To find the wavelength of a wave;

The wavelength is calculated from the wave speed and frequency by λ = wave speed/frequency, or λ = v / f.

Explanation:

Fluorine: F-

Aluminium: Al3+

Bromine: Br-

3F2 + 2AlBr3 => 3Br2 + 2AlF3

The balanced equation for the given chemical reaction can be given as

3F[tex]_2[/tex] + 2AlBr[tex]_3[/tex] [tex]\rightarrow[/tex] 3Br[tex]_2[/tex] + 2AlF[tex]_3[/tex]

An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, both sides of both the reaction have an equal balance of mass and charge.

The products and reactants of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified.

The balanced equation for the given chemical reaction can be given as

3F[tex]_2[/tex] + 2AlBr[tex]_3[/tex] [tex]\rightarrow[/tex] 3Br[tex]_2[/tex] + 2AlF[tex]_3[/tex]

Therefore, the balanced equation for the given chemical reaction can be given as

3F[tex]_2[/tex] + 2AlBr[tex]_3[/tex] [tex]\rightarrow[/tex] 3Br[tex]_2[/tex] + 2AlF[tex]_3[/tex]

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Answer:

A

Explanation:

The products of a chemical equation is what is being experimented with. However, the results in which you get are known as your solution.

Answer:

An object's density is the ratio of mass to volume of an object. The mass is how much it resists acceleration when a force is applied to it and generally means how much of an object or substance there is.

Answer:

brainleist

pls

Explanation:

An object's density is the ratio of mass to volume of an object. The mass is how much it resists acceleration when a force is applied to it and generally means how much of an object or substance there is.

Answer:

True

Explanation:

Answer:

It is true!

I hope this helps. Have an awesome day <3

Answer:

B) Percent yield = 56%

Explanation:

Given data:

Mass of potassium iodide = 23 g

Mass of lead iodide formed = 18 g

Percent yield = ?

Solution:

Chemical equation:

2KI + Pb(NO₃)₂    →     2KNO₃ + PbI₂

Number of moles of potassium iodide:

Number of moles = mass / molar mass

Number of moles = 23 g/ 166 g/mol

Number of moles = 0.14 mol

Now we will compare the moles of PbI₂ and KI:

                      KI          :           PbI₂        

                      2           :             1

                      0.14      :          1/2×0.14 = 0.07        

Theoretical yield of PbI₂:

Mass = number of moles × molar mass

Mass = 0.07 × 461 g/mol

Mass =  32.27 g

Percent yield:

Percent yield = actual yield / theoretical yield × 100

Percent yield = 18 g/ 32.27 g × 100

Percent yield = 56%

The percent yield : 73.5%

Given

Reaction

C+2H₂⇒CH₄

Required

The percent yield

Solution

mol of Carbon(as a limiting reactant) :

[tex]\tt \dfrac{100}{12}=8.3[/tex]

mol CH₄ based on C, and from equation mol ratio C : CH₄, so mol CH₄ = 8.3

Mass of Methane(theoretical yield) :

[tex]\tt mass=mol\times MW\\\\mass=8.3\times 16=133.3~g[/tex]

[tex]\tt \%~yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{98}{133.3}\times 100\%=73.5\%[/tex]

Answer:

See explanation

Explanation:

We define the rate of reaction as the rate of disappearance of reactants or the rate of appearance of products. The negative sign written before the rate of change of concentration of reactants shows that their concentration decreases with time.

The rate of reaction in terms of the concentration of each reactant or product is shown below;

Rate = -1/4d[NH3]/dt

Rate = -1/5d[O2]/dt

Rate = 1/4d[NO]/dt

Rate = 1/6[H2O]/dt

Answer:

A

Explanation:

The coefficient of oxygen gas (O2) in the following balanced equation is: 4Na + O2 → 2Na2O, is 1.

BALANCING EQUATION:

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I can help with 1, 2, 3, and 4... 5 and 6, I don't understand.

Template sequence : TACCCTTGAATAAAAAATCTCTGTTTGGTCGGTATTGTTGAAATC

Complement sequence : ATGGGAACTTATTTTTTAGTGTCAAACCAGCCATAACAACTTTAG

mRNA sequence : AUGGGAACUUAUUUUUUAGAGACAAACCAGCCAUAACAACUUUAG

Anticodon sequence : AUG-GGA-ACU-UAU-UUU-UUA-GAG-ACA-AAC-CAG-CCA-UAA-CAA-CUU-UAG

(not 6) Protein synthesis : START-Gly-Thr-Tyr-Phe-Leu-Glu-Thr-Asn-Gin-Pro-Stop

Answer:

Carbon and phosphorus

Explanation:

The atoms of carbon and phosphorus are most likely to gain electrons from the given choices .

The reason for this is because, both carbon and phosphorus are non-metals. Most non-metals usually accept electrons.

Metals are usually electron donors .

Answer: The answer is C- comets!                                                                            

Explanation:  Callisto is composed mainly of rock and water ice, although other ices like ammonia ice and carbon dioxide ice may be present. Water ice occurs at the surface of Callisto so it would be comets.

I think the Answer is C because Flourine is stronger in electron attraction and is smaller so it has a stronger electronic pull. Hope this helps :)

Answer:

H2O2

Explanation:

I know it's been awhile since the question was asked but for future people like me its H2O2 I got it right in the quiz.

The whole-number multiple is obtained by dividing its molar mass (34.02 g/mol) by the empirical formula mass. H₂O₂ is the molecular formula of a compound that is composed of 94.1% O and 5.9% H with a molar mass of 34g.

The mass of a sample of a chemical compound divided by the quantity, or number of moles in the sample, measured in moles, is known as the molar mass of that compound. The molar mass of a material is a bulk attribute rather than a molecular one.

The mass of 6.022 × 10²³ atoms, molecules, or formula units of a material are equal to its molar mass, which is the mass of 1 mole of that substance represented in grams per mole.

Molar mass is a crucial factor to consider while planning an experiment. The molar mass enables you to calculate the quantity you should weigh out on your scale when testing theories that call for specified amounts of a material.

Thus, H₂O₂ is the molecular formula of a compound that is composed of 94.1% O and 5.9% H with a molar mass of 34g.

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Answer:

To know more about chemicals and how to utilise them to solve man's probl

the answer would be B

the particles wouldnt break, nor would the form new particles or just disappear

Answer:

Volume also reduced to half

Explanation:

Volume and absolute temperature are directly proportional to each others

Answer:

No. of molecules= mass/molar mass ×avogadro no.

                         =  13.2/50×6.02×10°23

  No. of molecules =1.59×10°23

Explanation:

Answer:

D

Explanation:

The cell is the basic structural, functional and biological unit of all known living organisms. Cells are the smallest unit of life that is classified as a living thing, and are often called the "building blocks of life.

Answer:

a cell

Explanation:

All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms.

Answer:

Al2O3

Explanation:

Al2O3 has an ionic bond because the bonds between them are very strong

Answer: The atom has three components the electrons, neutrons and protons.

Explanation:

J.J Thomson is responsible for the discovery of electron. He discovered the electrons while determining the properties of cathode rays in 1897. Rutherford is responsible for the discovery of proton during 1909 while performing the gold foil experiment. W. Bothe and H. Becker is credited to the discovery of neutrons.                          

Answer: Boiling water

Explanation:

Answer:

1218.585

Explanation:

Looking at the subscripts we know there are 2 atoms of Fe, 3 atoms of C, and 6 of O.

Take the molar mass of each atom (from the periodic table) and multiply by the # of atoms

Fe: 55.845×2= 111.69

C: 12.011×3= 36.033

O:15.999×6=95.994

Add the values together: 243.717 g/mol

That is 1 mole of the molecule. Multiply by 5 for the final answer.

243.717×5=1218.585

Answer:

The final volume of the Nitrogen gas is 54.03 L.

Explanation:

Given;

initial volume of the Nitrogen gas, V₁ = 80 L

initial pressure of the Nitrogen gas, (at STP), P₁ = 101.3 kPa

final pressure of the Nitrogen gas, P₂ = 150 kPa

If the temperature is held constant, apply Boyle's law to determine the final volume of the Nitrogen gas.

V₁P₁ = V₂P₂

[tex]V_2 = \frac{V_1P_1}{P_2} \\\\V_2 = \frac{(80 \ L)(101.3 \ kPa)}{150 \ kPa} \\\\V_2 = 54.03 \ L[/tex]

Therefore, the final volume of the Nitrogen gas is 54.03 L.