The diagram below shows three kettles with their powers and the time they take to boil 500cm3 of water. How much energy is transferred (in kilojoules, kJ) by the 1.4kW kettle while it boils the water?

Answer:

4.03 × 10²² particles of beryllium sulfide.

Explanation:

The formula to find the number of particles is:

Number of particles/atoms = number of moles × (6.02 × 10²³)

6.02 × 10²³ = Avogadro's number

But first, we will have to find the number of moles. This can be found using the formula:

Number of moles = mass ÷ Mr

  Mr of BeS = 9 + 32.1 = 41.1

  Number of moles = 2.74 ÷ 41.1 = 0.067 mol

Now that we know the number of moles, we can find the number of particles.

   Number of particles = 0.067 × 6.02 × 10²³

∴ Number of particles =  4.03 × 10²²

Answer:

4.03 × 10²² particles

Explanation:

Had the same question and got it correct.

The solubility curve is a plot of solubility against temperature.

The term solubility refers to the amount of substance that dissolves in solution at a given temperature. Hence, the solubility curve is a plot of solubility against temperature.

Thus, from the solubility curve (not shown) the amount if HCl dissolved can be obtained hence the question is incomplete.

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The unknown mineral is gold because of the similar properties of gold to that unknown mineral.

The unknown mineral is Gold because it has similar properties to the gold. Gold has density of 19.3 grams per cubic centimeter which is same to this unknown mineral. The hardness and mass of the mineral are also similar to the Gold.

So we can conclude that the unknown mineral is gold because of the similar properties of gold to that unknown mineral.

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Answer:

962.2 K

Explanation:

Ideal Gas Law Equation:

PV = nRT

Writing a Equation to find T2:

PV = nRT

(P1V)/(nT1) = R = (P2V)/(nT2)

(P1)/(T1) = R = (P2)/(T2)                  V and n cancel out since they are constant.

(P1)/(T1) = (P2)/(T2)

T2 = (P2)(T1)/(P1)

Substituting Into the Equation:

T2 = (283 kPa * 170 K)/(50 kPa)

T2 = 962.2 K

Answer:

Out of the above mixtures, seawater, air, and soda water are solutions.

hope this helps :3

Answer:

660J/kg.°C

Explanation:

Using the fact that

∆E of metal + ∆E of water = 0

∆E of the metal = Q = m*c*(T2-T1)

Where

Q = heat lost or gained = ?

m = mass of metal in kg = 0.076kg

c = specific heat of the metal = ?

T1 = 96°C

T2=31°C

∆E of the water=Q= m*c*(T2-T1)

Where

Q = 0.120*4180*6.5 = 3260J

Therefore

3,260J + Q of the metal =0

3,260J + 0.076*C*(31.0–96.0)=0

3,260J - 4.94c = 0

3,260 = 4.94c

3,260/4.94 = c

660J/kg.°C = specific heat of the metal

hope this helps:)

Particle arrangement, shape, and size of the four states of matter generally decreases from solids to plasma, whereas particle motion and compressibility increases from solids to plasma.

The four states of matter are:

Comparison of the properties of the four states of matter in terms of particle arrangement, particle motion, shape, size, and compressibility can be summarized as follows:

Therefore, the particle arrangement, shape, and size of the four states of matter generally decreases from solids to plasma, whereas particle motion and compressibility increases from solids to plasma.

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Answer:

There is an infinite number of Principal Energy Levels, see the answer for a full explanation

Explanation:

As stated above There is an Infinite number of principal energy levels, yet there are 4 main principles for principal energy; energy levels, sublevel, orbitals, and a number of electrons per sublevel.

Answer:

the daddy and Video Bhai have a

Explanation:

for and or for the if or as or as there have no a of option to go with you 6th and I would love from you to help out in any event that I am from the only reason you would be so close and to me million times is the fact I am from the the only reason you have to do it the way I want it is the best way for us and we are not me million people that are not got to me it's not like they were in a bad place and they didn't want me million other people in my world who made me think about you are

The theoretical yield of a substance is the amount of the mass that is calculated from stoichiometry. The mass of sodium chloride produced is 13.03 gms.

Mass of the substance is a multiplication of the molar mass and moles.

The balanced reaction is given as:

CuCl₂ + 2NaNO₃ ⇒ 2NaCl + Cu(NO₃)₂

Moles of copper chloride are calculated as: 15 ÷ 134.45 = 0.115 moles

Moles of sodium nitrate are calculated as: 20 ÷ 84.99 = 0.2353 moles

From the reaction, 1 mole of copper chloride gives 2 moles of sodium chloride so, 0.115 moles of copper chloride will produce 0.223 moles.

Similarly, 2 moles of sodium nitrate produce 2 moles of sodium chloride so, 0.2353 moles produce 0.4706 moles.

From this, it can be concluded that copper chloride is a limiting reagent and will be used to calculate the mass of NaCl.

Mass of NaCl is calculated as: Mass = 0.223 moles × 58.44 = 13.03 gms.

Therefore, 13.03 gms is the theoretical yield of sodium chloride.

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Answer:

1) Ice, iron, calcium oxide and mercury are pure substances since they contain particles of only one kind of matter.

2) In contrast, milk, hydrochloric acid (hydrogen chloride gas dissolved in water), brick and air cannot be called pure substances because they consists of particles of more than one kind of matter.

Answer:

1.01

Explanation:

you have to trust me

They travel in compressions and rarefactions and are propagated through air.

Sound waves are longitudinal waves. They travel in compressions and rarefactions and are propagated through air.

The following are true about sound waves:

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Answer: D

Explanation:

I assume you meant [tex]\text{K}_{2}\text{SO}_{4}[/tex].

So, the formula mass of potassium sulfate is 2(39.0983)+32.065+4(15.9994)=174.2592 g/mol.

So, 5.00 moles have a mass of (5.00)(174.2592), which is about 870 g

Answer:

solar radiation

Explanation:

The name of the configuration management procedure that involves the collection of information about a system under normal operating conditions is Baselining.

Baselining is a management process used to analyze a collection of information about a particular system.

This procedure (Baselining) is well known to analyze computer performance in a given network.

In conclusion, the name of the configuration management procedure that involves the collection of information about a system under normal operating conditions is Baselining.

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The volume of hydrogen chloride gas, HCl at s.t.p yielded is determined as 4.032 dm³.

The number of moles of the gas yield is calculated as follows;

n = 1.2 dm³ x 0.15 mol/dm³

n = 0.18 mole

one mole of HCl gas at stp = 22.4 dm³

0.18 mole = ?

= 0.18 x 22.4 dm³

= 4.032 dm³

Thus, the volume of hydrogen chloride gas, HCl at s.t.p yielded is determined as 4.032 dm³.

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Answer:

Increases

Explanation:

The general effect we see as temperature increases is that rate of dissolution of a solid solute increases,

Therefore, we can say that :

Temperature ∝ Rate of dissolution

Some animals would be forced to migrate due to cutting of forest , Option D is the correct answer.

The complete question is

Humans clear-cut a forest. Which is one possible way that animals would most likely be affected by this action? Some animals would adapt. Some animals would go extinct. Some animals would evolve. Some animals would be forced to migrate.

Deforestation means cutting down trees of the forest for wood , or for making more space for living.

Deforestation leads to destruction of habitats of animals .

The balance of the nature gets disturbed , the sea and water bodies get dried up , leading to no water for the animals in the forest.

Animals need big bushes and trees to hide and live.

The Ecosystem gets destroyed because of the cutting of trees by human and so this has lead the animals to migrate.

Therefore Option D is the correct answer.

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Answer:

38.54 x 10^23 atoms of N2

Explanation:

Each mole contains Avagadro's Number ( 6.022 x10^23) of particles

   3.2   x     6.022 x 10^23 = 19.27 x 10^23 MOLECULES

   N2  is TWO atoms    soooo    2 x 19.27 x 10^23 = 38.54 x 10^23 atoms

Eclipsed conformers possess torsional strain and Staggered conformers are lower in energy than eclipsed conformers are TRUE about the stability of conformers.  

Eclipsed conformers are molecular arrangements where two substituents are very close and thus produce torsion.

Moreover, Staggered conformers are molecular arrangements where substituents are found at a maximum length.

In conclusion, Eclipsed conformers possess torsional strain and Staggered conformers are lower in energy than eclipsed conformers are TRUE about the stability of conformers.  

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[tex](2.4L)NH_3[/tex] is the maximum volume of ammonia gas that could be produced.

A mole is a very important unit of measurement that chemists use. A mole of something means you have 602,214,076,000,000,000,000,000 of that thing, like how having a dozen eggs means you have twelve eggs.

Here is the balanced equation:

[tex]N_2 +3H_2[/tex] → [tex]2NH_3[/tex]

At STP, 1 mole has a volume of 22.4 Liters. To do a dimensional analysis conversion from Liters to moles:

Please observe that Liters and moles vary directly, therefore, we can simply multiply each of the coefficients (that represent moles) by

1.2 L to obtain the volumes:

[tex]\frac{N Litres}{1} \frac{1}{22.4 Litres} =\frac{N }{22.4} mole[/tex]

[tex](1.2L)N_2+(3.6L)H_2 = (2.4L)NH_3[/tex]

Hence, [tex](2.4L)NH_3[/tex] is the maximum volume of ammonia gas that could be produced.

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(a) The vegetable soup you had for lunch: mixtures substances

(b) The fertilizer your dad spreads on the front lawn in the spring:   mixtures substances

(c) the salt you sprinkle on your French fries: pure substances

(d) the hydrogen peroxide you cleaned a cut finger with:  pure substances

In chemistry and related fields, a mixture refers to a substance that is composed of two or more substances. This is the opposite of a pure substance that has not been combined with others. In the case of vegetable soup, this is a mixture because it integrates multiple substances such as water, salt, vegetables, etc.

On the other hand, a mixture is classified as homogeneous if the elements are completely integrated, and the final substance is uniform or as heterogeneous if the mixture is not uniform. In the case of the soup, this can be classified as a heterogeneous mixture because in most cases you can identify the elements in it such as pieces of vegetables and therefore it is not a uniform or homogeneous mixture.

Thus, this could be the answer.

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Salt and sugar have strong attractive forces whereas oil has weak attractive forces between particles.

The attractive forces between particles in the salt and sugar substances have strong because of its solid state while on the other hand, the attractive force between particles of oil is weak because of its liquid state.

So we can conclude that salt and sugar have strong attractive forces whereas oil has weak attractive forces between particles.

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The strength of the attractive forces between the molecule of oil, sugar and salt increases from oil to sugar to salt.

The melting point of a substance is the temperature at which the solid substance melts.

The melting point of a substance is a constant for a pure substance.

The higher the attractive forces between the molecules of a substance, the higher the melting point will be.

Between the three substances, oil has the lowest melting point while salt has the highest melting point.

Therefore, the strength of the attractive forces between the molecule of oil, sugar and salt increases from oil to sugar to salt.

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Answer :]

to convert from g NaOH to mol NaOH. = 1.48 g NaOH are needed to neutralize the acid.

Answer:

P3

Explanation:

Im pretty sure hope this helps

The actual yield of the experiment given the data from the question is 92.4 g (Option B)

This is the ratio of the actual yield to the theoretical yield of a given reaction multiplied by 100

Percentage yield = (Actual / Theoretical) × 100

This is the amount obtained from the expriment procedures

This is the amount obtained from simple calculations as regarding the experiment.

Actual yield = percentage yield × theoretical yield

Actual yield = 80.34% × 115

Actual yield = 0.8034 × 115

Actual yield = 92.4 g

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Answer:

The release of energy from fuels is used to make other forms of

energy. When gasoline burns in a car engine, some of the

chemical energy in the gasoline is converted into heat. The heat

is converted into mechanical energy. The mechanical energy

moves the car .

if you know that I am right please mark it as brainliest

Answer:

It is asking for 3 energy conversions like Mechanical energy is one of them

Explanation:

Answer:

First Law of Thermodynamics

Explanation:

The first law of thermodynamics is literally another name for the law of conservation of energy.

The conductance of the electric current through the electrolytic solution increases with increase in concentration.

Electrolytic solutions are solutions that are capable of conducting an electric current due to presence of ions.

The current flowing in an Electrolytic solutions is calculated as;

Q = It

I = Q/t

where;

Increase in the concentration of the charges, increases the amount of charges in the solution and hence the conductance of the solutions will increase as well.

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