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F. SECTION A
G. SECTION D
H. SECTION C
J. SECTION B

Answer:

The amount of P₄S₃ produced is 0.16 moles.

Explanation:

The balanced reaction is:

8 P₄ + 3 S₈ → 8 P₄S₃

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate:

Being the molar mass of each compound:

then by stoichiometry of the reaction, the following amounts of reactant and product participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

In this case, you calculate the limiting reactant using the following rule of three: if by stoichiometry 768 g of S₈ react with 991.16 g of P₄, 40 g of S₈ with how much mass of P₄ will it react?

[tex]mass of P_{4}=\frac{40 grams of S_{8} *991.16 grams of P_{4} }{768 grams of S_{8}}[/tex]

mass of P₄= 51.62 grams

But 51.62 grams of P₄ are not available, 20 grams are available. Since you have less mass than you need to react with 40 grams of S₈, P₄ will be the limiting reagent.

Then you can apply the following rule of three: if by stoichiometry 991.16 grams of P₄ form 8 moles of P₄S₃, 20 grams of P₄ will form how many moles of P₄S₃?

[tex]moles of P_{4} S_{3}=\frac{20 grams of P_{4} *8 moles ofP_{4} S_{3} }{991.16 grams of P_{4}}[/tex]

moles of P₄S₃= 0.16

The amount of P₄S₃ produced is 0.16 moles.

The geologic process that directly forms beaches on the shores of the bay should be considered as the sediment deposition.

The Deposition refer to the laying down of sediment that should be carried by wind, where the water should be flowing down or there is the sea or ice. Sediment could be transported just like the pebbles, sand ,and mud, or as salts mix in the water.

Therefore, The geologic process that directly forms beaches on the shores of the bay should be considered as the sediment deposition.

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Answer:

true

Explanation:

Answer:

false

Explanation:

i took the test and got it right

Answer:

it is elimination reaction

Explanation:

Because substitution takes place not elimination

Answer:

O = 57.14%

C = 42.86%

Explanation:

First of all we will calculate the molar mass of CO.

C = 12 g/mol

O = 16 g/mol

CO = 12 g/mol + 16 g/mol

CO = 28 g/mol

Percent composition:

C = (12 g/mol  /28 g/mol ) × 100

C = 42.86%

O = (16 g/mol  /28 g/mol ) × 100

O = 57.14%

Answer:

it should be 42.86% carbon and 57.14% oxygen

C = 12

O = 16

CO = 12 + 16

CO = 28

C = (12 /28 ) × 100

C = 42.86%

O = (16  /28 ) × 100

O = 57.14%

Answer:

Mountainous roads are winding and gently sloping in order to reduce the effect of steepness which causes more downward gravitational pull to the vehicles on it. A steeper sloped road would slow the car down to a greater extent that an gently sloping one.

Answer:

Percentage yield

Explanation:

The formula given in question above is used to calculate the percentage yield.

The percentage yield of a given reaction is defined as the value obtained in percent by comparing the actual and theoretical yield together. It can be obtained by using the following formula:

Percentage yield = (Actual / Theoretical) × 100

Where:

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Answer:

you know it is what it is☠

Explanation:

Nonmetallic elements form ions by valence electrons to complete their outer shell. The valence electrons an element has in its outer shell, the easier it is to complete. The electron shells an element has, the easier it is to fill its outermost shell.

The question is incomplete, the complete question is;

In this stoichiometry problem, determine the percentage yield:

Excess aluminum metal reacts with aqueous nickel(II) sulfate to produce aqueous aluminum sulfate and nickel as a precipitate. In this reaction 108 g of aluminum were combined with 464 g of nickel(II) sulfate to produce 274 g of aluminum sulfate.

Answer:

80%

Explanation:

The reaction equation is;

2Al(s) + 3NiSO4(aq) --------> Al2(SO4)3 + 3Ni(s)

Since Al is in excess then NiSO4 is the limiting reactant.

Number of moles in 464 g of NiSO4 = mass/ molar mass

Molar mass of NiSO4 = 155 g/mol

Number of moles = 464g/155g/mol = 2.99 moles

Number of moles of Al2(SO4)3 = mass/molar mass

molar mass = 342 g/mol

Number of moles = 274g/342g/mol = 0.8 moles

From the reaction equation;

3 moles of NiSO4 yields 1 mole of Al2(SO4)3

2.99 moles of NiSO4 yields 2.99 * 1/3 = 1 mole of Al2(SO4)3

% yield = actual yield/ theoretical yield * 100/1

actual yield =  0.8 moles of Al2(SO4)3

Theoretical yield = 1 mole of Al2(SO4)3

% yield = 0.8/1 * 100 = 80%

In this exercise we have to use the knowledge of reaction to calculate the required percentage, in this way we find that:

[tex]80\%[/tex]

The reaction equation is;

[tex]2Al(s) + 3NiSO_4(aq) \rightarrow Al_2(SO_4)_3 + 3Ni(s)[/tex]

Since Al is in excess then NiSO4 is the limiting reactant. Now knowing that the data informed is:

From the reaction equation;

[tex]\% yield = actual\ yield/ theoretical\ yield * 100/1\\\% yield = 0.8/1 * 100 = 80%[/tex]

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Answer:

It should be the same as the reactants. Because there is no loss or replacements.

Explanation:

Answer:

The same as the reactants

Explanation:

Answer:

5

Explanation:

Answer:

2 in the first and 4 in the second

Explanation:

in an atom the first energy level has only 2 spaces for electrons, as the number electrons goes up so does the amount of energy levels

Answer:

nector

Explanation:

Question:

How many moles of H2O are formed from the combustion of 5.0 mol CH4

Answer:

For any balanced chemical reaction, whole numbers (coefficients) are used to show the quantities (generally in moles ) of both the reactants and products. For example, when oxygen and hydrogen react to produce water, one mole of oxygen reacts with two moles of hydrogen to produce two moles of water.

Answer: All living organisms share several key characteristics: sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.

Answer:

V = 20.1 L

Explanation:

Given data:

Volume of flask = ?

Number of moles of nitrogen gas = 0.730 mol

Pressure = 698 mmHg (698/760 = 0.92 atm)

Temperature = 35.4°C

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

35.4+273 = 308.4 K

by putting values,

0.92 atm× V = 0.730 mol ×0.0821 atm.L/ mol.K × 308.4 K

V = 18.48 atm.L / 0.92 atm

V = 20.1 L

Energy to freeze : 10020 J

Given

mass of H₂O = 30 g

Required

Energy to freeze

Solution

Reaction

H₂O(l) ⇒  H₂O(s)

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Lf = latent heat of fusion (for water/ice = 334 J/g)

Then heat to freeze :

[tex]\tt Q= 30\times 334=10020~J[/tex]

Answer:

A net ionic equation shows only the chemical species that are involved in a reaction, while a complete ionic equation also includes the spectator ions.

Brainlist pls!

Answer:

the decrease is the answer to the question

Answer:

D. A reaction in which an atom has gained 1 or more electrons.

Explanation:

The oxidation reduction reactions are called redox reaction. These reactions are take place by gaining or losing the electrons and oxidation state of elements are changed.

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Consider the following reactions.

4KI + 2CuCl₂  →   2CuI  + I₂  + 4KCl

The oxidation state of copper is changed from +2 to +1 so copper get reduced by gaining the one more electron

Given that,

The wavelength of microwave radiation = 1 cm = 0.01 m

To find,

The frequency and the energy of a single photon of this radiation.

Solution,

Let f be the frequency of the wave. The relation between frequency and wavelength is given by :

[tex]f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{0.01}\\\\=3\times 10^{10}\ Hz[/tex]

Let E be the energy of the wave. The energy of the wave is given by :

[tex]E=hf\\\\=6.63\times 10^{-34}\times 3\times 10^{10}\\\\=1.98\times 10^{-23}\ J[/tex]

We know that, [tex]N_A=6.022\times 10^{23}\ \text{photons/mol}[/tex]

Energy :

[tex]E={1.98\times 10^{-23}}\times {6.023\times 10^{23}}\\\\=11.92\ J/mol[/tex]

Hence, this is the required solution.

Answer:

Xe 4f14 5d3 6s2

Explanation:

Answer:

The correct answer is - They gently shake the pan causing the marbles to move back and forth.

Explanation:

When water is heated the molecules present in its liquid state start to move and vibrate faster and allows the water to expand and increase in volume. If the heat is continuously applied to the water its molecules move even faster and escape in the form of molecules of vapor to the atmosphere.

To exhibit this phenomenon by the marble and pan, Richard and Brooke should gently shake the pan causing the marbles to move back and forth which shows faster vibration and movement of molecules.

Answer:

The particles in the substance become less active

Answer:

6.4924249 × 10^-23 g you need to solve it

Answer:

D. It is limited to situations that involve aqueous solutions or specific compounds.

Explanation:

It is the only interpretation that involves specifically aqueous solutions.

The statement that describe Arrhneius interpretation of acids and bases is It is limited to situations that involve aqueous solutions or specific compounds.

Svante Arrhenius a swedish scientist formulated a theory about acid and bases in 1884 based on theory of ionization. Arrhenius stated that acids contains hydrogen ions and when its dissociates in water will give out H+ ions and base is an hydroxide substances that will produce OH− ions on when it dissociates in water.

Therefore, The statement that describe Arrhneius interpretation of acids and bases is It is limited to situations that involve aqueous solutions or specific compounds.

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Answer:

[tex]\boxed{\pink{\sf Option \ (a) \ is \ Correct .}}[/tex]

Explanation:

Given that , A can of cola contains approximately 240 calories. And we consume two cans of cola each day. So , calories consumed in one day

[tex] = 2 \times 240 calories \\\\= 480 calories [/tex]

In a week there are seven days. So calories consumed in a week

[tex]= 7 \times 480 calories \\\\= 3360 calories [/tex]

Which is approximately equal to 3,400 calories.