How much percent of shops are in the city? How about in the country?

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Answer:

4 NH₃ (g) + 3 O₂ (g) ----> 2 N₂ (g) + 6 H₂O (g) + energy

Explanation:

The unbalanced equation:

NH₃ (g) + O₂ (g) ----> N₂ (g) + H₂O (g) + energy

Reactants: 1 nitrogen, 3 hydrogen, 2 oxygen

Products: 2 nitrogen, 2 hydrogen, 1 oxygen

The sort-of balanced equation

2 NH₃ (g) + 1/2 O₂ (g) ----> N₂ (g) + 3 H₂O (g) + energy

I first started by balancing the nitrogens. This then lead me to balance the hydrogens. When I went to balance the oxygens, only a 1/2 coefficient would work. However, 1/2 coefficients are technically incorrect. To get rid of this coefficient, you need to multiply each coefficient by 2.

The balanced equation:

4 NH₃ (g) + 3 O₂ (g) ----> 2 N₂ (g) + 6 H₂O (g) + energy

Reactants: 4 nitrogen, 12 hydrogen, 6 oxygen

Products: 4 nitrogen, 12 hydrogen, 6 oxygen

Now, all of the elements are equal on both sides and there are no 1/2 coefficients. These are the smallest whole-number coefficients because some of the numbers cannot be further simplified (3).

The change in temperature of the metal is 6.1°C. Details about change in temperature can be found below.

The change in temperature of a substance can be calculated by subtracting the initial temperature of the substance from the final temperature.

According to this question, a 25.0 g sample of metal at 16.0 °C is warmed to 22.1 °C by 259J of energy.

This means that the change in temperature of the metal can be calculated as:

∆T = 22.1°C - 16°C

∆T = 6.1°C

Therefore, the change in temperature of the metal is 6.1°C.

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Answer: 6.1°C.

Explanation: just for some extra verification, the answer is indeed 6.1°C. Hope this helps and have a great day!

The energy source from a reservoir would provide affordable, abundant electricity for a factory is a hydroelectric power plant; option D.

Energy is the ability to do work.

Energy generating plants may either use wind, water or solar energy to produce electrical energy.

The most abundant source of energy from a reservoir is hydroelectric power plant.

Therefore, the energy source from a reservoir would provide affordable, abundant electricity for a factory is a hydroelectric power plant.

In conclusion, hydroelectric power plants are reservoirs of abundant energy supply.

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Taking into account the definition of density, the density of the glucose is 1.03 [tex]\frac{g}{mL}[/tex].

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

[tex]density=\frac{20.6 g}{20 mL}[/tex]

Solving:

density= 1.03 [tex]\frac{g}{mL}[/tex]

In summary, the density of the glucose is 1.03 [tex]\frac{g}{mL}[/tex].

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Answer:

2.5 moles

Explanation:

Number of moles = MassMolar mass

= 80⋅g32.06⋅g⋅mol−1 = ??mol

Note that sulfur likely exists in its elemental state as S8. I am perfectly justified in treating sulfur as S. The number of sulfur atoms is the same in each case.

Answer:

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.

Explanation:

Answer:

Catalyst

Explanation:

Answer:

C.) 76.1 grams

Explanation:

To find the mass of bromine, you need to (1) convert grams AlCl₃ to moles AlCl₃ (via molar mass), then (2) convert moles AlCl₃ to moles Br₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Br₂ to grams Br₂ (via molar mass). It is important to arrange your ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).

Molar Mass (AlCl₃): 26.982 g/mol + 3(35.453 g/mol)

Molar Mass (AlCl₃): 133.332 g/mol

2 AlCl₃ + 3 Br₂ --> 2 AlBr₃ + 3 Cl₂

Molar Mass (Br₂): 2(79.904 g/mol)

Molar Mass (Br₂): 159.808 g/mol

42.3 g AlCl₃          1 mole               3 moles Br₂           159.808 g
------------------  x  -----------------  x  ----------------------  x  -------------------  =
                            133.332 g         2 moles AlCl₃            1 mole

=  76.0 g Br₂

*Our answers are slightly different most likely because we used slightly different molar masses*

Answer:

1482.6 J

Explanation:

353 cal * 4.2 J / 1 cal = 1482.6 J

An ice cube absorbs 353 cal of energy from its surroundings. Number of joules of energy is 1482.6 Joules.

The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.

Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.

Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.

1 calorie of energy has 4.2 Joules.

Given, 353 Calories of Energy

Hence, 353 Calories of Energy has 1482.6 Joules.

Therefore, An ice cube absorbs 353 cal of energy from its surroundings. Number of joules of energy is 1482.6 Joules.

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Taking into account the reaction stoichiometry, 2 moles of Na₃PO₄ can be produced when 6.0 mol NaOH reacts with 9.0 mol H₃PO₄.

In first place, the balanced reaction is:

3 NaOH + H₃PO₄ → 3 H₂O + Na₃PO₄

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

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 1 mole of H₃PO₄ reacts with 3 moles of NaOH, 9 moles of H₃PO₄ reacts with how many moles of NaOH?

[tex]moles of NaOH=\frac{9 moles of H_{3} PO_{4} x3 moles of NaOH}{1 mole of H_{3} PO_{4}}[/tex]

moles of NaOH= 27 moles

But 27 moles of NaOH are not available, 6 moles are available. Since you have less moles than you need to react with 9 moles of H₃PO₄, NaOH will be the limiting reagent.

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 3 moles of NaOH form 1 mole of Na₃PO₄, 6 moles of NaOH form how many moles of Na₃PO₄?

[tex]moles of Na_{3}P O_{4} =\frac{6 moles of NaOHx1 mole of Na_{3}P O_{4} }{3 moles of NaOH}[/tex]

moles of Na₃PO₄= 2 moles

Then, 2 moles of Na₃PO₄ can be produced when 6.0 mol NaOH reacts with 9.0 mol H₃PO₄.

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Answer:

The first one is 2 but the second one is 9

Explanation:

The amount of quarts in 2.50 L is 2.65 qt

Since the teacher prepares 2.50 liters of salt solution for a class experiment, we require how many quarts there are in 2.50 liters.

Since we know that 1 L = 1.06 qt, converting liters to quarts, we have

2.50 L = 2.50 × 1 L

= 2.50 × 1.06 qt

= 2.65 qt

So, the amount of quarts in 2.50 L is 2.65 qt

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Answer:

With too little air, the gas mixture will not burn completely and will form tiny carbon particles that are heated to glowing, making the flame luminous. With too much air, the flame may burn inside the burner tube; that is, it may strike back.

Answer:

Sometimes peoples like to say that atom is like a cell in living things,is it true?comment below,letss goo!!

Explanation:

A greek philosopher known as Democritus was the first to consider the idea that matter is made up of small particles ,about 400BC.

Since there was no experimental evidence to support his idea,it was not accepted.

About 2000 years later an English man called John Dalton revived the discussion.He used experimental evidence to support his idea to convince people that matter is made up of particles called atoms.It accepted!.

An English man called John Dalton revived the discussion.He used experimental evidence to support his idea to convince people that matter is made up of particles called atoms.It was accepted ,he conclude the following theories:

The diagram that show the correct electron configuration is the second option. ⬆⬇1s,  ⬆⬇2s, ⬆⬆⬆2p.

The electronic configuration is the representation of electron present indifferent energy levels is an atom. The different type of orbitals are s, p, d, and f.

Thus, the correct option is 2, ⬆⬇1s,  ⬆⬇2s, ⬆⬆⬆2p.

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Answer:

The number of moles of H₂O is 0.135 mol.

The number of moles of LiClO₄ is 0.0449 mol.

Explanation:

Mole is an important standard unit used for the measurement of large quantities of atoms, molecules, or other particles. One mole is equal to 6.022×10²³ units.

The number of moles of a substance is calculated by:

[tex]\frac{mass of substance}{molecular weight of substance}[/tex]

To find the number of moles of H₂O:

Mass of H₂O in the sample = 2.43g

The molecular weight of H₂O = 18.02g

Number of moles = [tex]\frac{2.43}{18.02}[/tex] = 0.135 mol.

To find the number of moles of LiClO₄:

Mass of LiClO₄ given = 4.78g

The molecular weight of LiClO₄ = 106.39g

Number of moles = [tex]\frac{4.78}{106.39}[/tex] = 0.0449 mol.

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Answer:

0.0449

Explanation:

No probelm

Emerald  can be described as a transparent, green coloured gem stone made up of mineral beryl together with trace amount of chromium or sometimes vanadium having chemical formula as [tex]Be_3Al_2(SiO_3)_6[/tex] .

Through time, the emerald has been known as a symbol of truth and love.

In ancient Greece and Rome, emerald was said to be the gemstone of the goddess Venus, purveyor of love and hope.

On the other side of the world, emeralds were revered by the Incas and believed by the Egyptians to be a source of eternal life.

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the formula: MCl₂

name of the product formed: chloride salt + hydrogen

According to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

It is a procedure that leads to combining and modifying the nuclei of atoms and subatomic particles and appears to violate the law of conservation of mass.

Through this kind of process, the nuclei can be combined or fragmented, absorbing or releasing particles and energy according to each case.

Therefore, we can conclude that according to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.

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Answer:

a) formula for citric acid is - C6 H8 o7

b) lime water turns opaque after adding co2 due to the formation of calcium carbonate.

c) reaction 3 is displacement reaction where a high reactive metal displace a less reactive from its salt solution.

d) reaction 1) is combination reaction where two reactant combines to give a single product whereas reaction 2) is decomposition reaction where a single reactant splits into more that 1 products.

The industrial methods of preparing alcohol that is more economical is fermentation.

Fermentation is defined as the industrial method by which starch is converted to ethyl alcohol by using some specific enzymes and microorganisms known as yeast

It is an economical method because the raw material which is starch is readily available.

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Answer:

25-54-46-36 619-73 77-88-50

A heterogeneous mixture is not uniform in composition. Hence, option C is correct.

A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.

This substance is not an element or compound, because different components could be observed in the substance.  

A pure substance is made up of only one type of atom (element) or only one type of molecule (compound), mixtures and solutions are made from two or more types of pure substances.

For example, aluminium is an element and ammonia is a compound.

This substance is not a homogeneous mixture, because different samples of the substance appeared to have different proportions of the components.

Hence, this substance is a heterogeneous mixture.

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Answer:

heterogeneous mixture

Explanation:

Answer: D. They will approach the problem in different ways but share ideas.

Answer:

Faraday’s – First Law of Electrolysis

It is one of the primary laws of electrolysis. It states, during electrolysis, the amount of chemical reaction which occurs at any electrode under the influence of electrical energy is proportional to the quantity of electricity passed through the electrolyte.

Faraday’s – Second Law of Electrolysis

Faraday’s second law of electrolysis states that if the same amount of electricity is passed through different electrolytes, the masses of ions deposited at the electrodes are directly proportional to their chemical equivalents.

From these laws of electrolysis, we can deduce that the amount of electricity needed for oxidation-reduction depends on the stoichiometry of the electrode reaction.

The product of an electrolytic reaction depends on the nature of the material being electrolysed and the type of electrodes used. In the case of an inert electrode such as platinum or gold, the electrode does not participate in the chemical reaction and acts only as a source or sink for electrons. While, in the case of a reactive electrode, the electrode participates in the reaction.

Hence, different products are obtained for electrolysis in the case of reactive and inert electrodes. Oxidizing and reducing species present in the electrolytic cell and their standard electrode potential too, affect the products of electrolysis.

FAQs

1. What’s a Faraday?

Ans: The Faraday is an electric charge volume unit without measurements, equal to approximately 6.02 x 10 23 electric charge carriers.

2. Why is Faraday’s law important?

A shifting magnetic flux creates an electric field, according to Faraday’s law. Faraday’s law is particularly important since it addresses the connection of the E-field and the B-field and understands that this connection necessitates flux fluctuation over time.

3. How does electrolysis remove rust?

Ans: Electrolysis is a method of removing iron oxide by passing a small electrical charge through the rusty metal from a battery or battery charger to induce ion exchange while the device is submerged in an electrolyte solution.

4. What happens to water during electrolysis?

Ans: Water’s Electrolysis. By passing an electrical current through it, water can be decomposed. When this happens, an oxidation-reduction reaction is caused by the electrons from the electric current.

5. What is the negative electrode called in electrolysis?

Ans: Through electrolysis, the negatively charged electrode is called the cathode. The positively charged electrode is called the anode in electrolysis. Negatively charged ions are moving towards the anode.

Hope it helps!

Answer:

Faraday's law states that the absolute value or magnitude of the circulation of the electric field E around a closed loop is equal to the rate of change of the magnetic flux through the area enclosed by the loop.

Explanation:

Hope It Helps!!!

CaF₂ ⇒ Ca²⁺ + 2F⁻

1.75       1.75     3.5

Answer:

Sample A=40 Sample B=50

Explanation:

32+48=80

32/80x100=40

The 100 is to convert it to a percentage

___________________________

Sample B

same thing

30+30=60

30/60x100=50

The mass percent of sulfur in compound B is 50 %

Mass percent is defined as a way of expressing a concentration or describing the component in a particular mixture.

It can also be defined as a mass of a element or solute divided by the mass of compound or solvent.  

Mass percent of sulfur of sample A

= 32 + 48 = 80

= 32 / 80 x 100

= 40 %

Mass percent of sulfur of sample B

= 30 + 30 = 60

= 30 / 60 X 100

= 50 %

Thus, the mass percent of sulfur in compound B is 50 %

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A homogenous mixture is that mixture in which the components mix with each other and its composition is uniform throughout the solution. A heterogenous mixture is that mixture in which the composition is not uniform throughout and different components are observed.

will you be my friend

Answer:

your cool

Explanation:

Answer:

0.000019952mol/dm3

Explanation:

pH=-log(H+)

4.7= -log(H+)

log(H+)=-4.7

(H+)=10*-4.7=0.000019952

Answer:

increases the gravitional pull on tge pane

Answer:

generates  more lifting on the plane

Explanation:

Answer:

1.) 0.1 M

2.) 0.2 M

3.) 1 M

4.) Solution #3 is the most concentrated because it has the highest molarity. This solution has the largest solute to solvent ratio. The more solvent there is, the lower the concentration and molarity.

Explanation:

To find the molarity, you need to (1) convert grams NaOH to moles (via molar mass from periodic table) and then (2) calculate the molarity (via the molarity equation). All of the answers should have 1 sig fig to match the given values.

Molar Mass (NaOH): 22.99 g/mol + 16.00 g/mol + 1.008 g/mol

Molar Mass (NaOH): 39.998 g/mol

4 grams NaOH           1 mole
----------------------  x  ------------------  = 0.1 moles NaOH
                                 39.998 g

1.)

Molarity = moles / volume (L)

Molarity = (0.1 moles) / (1 L)

Molarity = 0.1 M

2.)

Molarity = moles / volume (L)

Molarity = (0.1 moles) / (0.5 L)

Molarity = 0.2 M

3.)

Molarity = moles / volume (L)

Molarity = (0.1 moles) / (0.1 L)

Molarity = 1 M