When a single salt crystal is added to a cool liquid, large crystals form. Which statement about the original cool liquid is correct?

A) The liquid is a heterogeneous mixture because the crystals can be easily separated from the liquid

B) The liquid is a pure substance because it was made up of a single compound

C) The liquid is a pure substance because it was uniform before the crystal was added

D) The liquid is a homogenous mixture because the substance that formed the large crystals was uniformly dissolved

Answers

Answer 1

The liquid is a homogeneous mixture because the substance that formed the large crystals was uniformly dissolved.

A solution is composed of a solute and a solvent. A solution is a typical example of a homogeneous mixture.

We define a solution as any combination of solute and solvent. A solution can be regarded as a homogeneous mixture since the solute is uniformly distributed throughout the solution. The solute and solvent constitutes one phase.

When a salt crystal is added to the solution, crystallization is induced and large crystals of solute form.

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Answer 2

A salt crystal is a cubic form of sodium chloride that is closely bounded together by the reaction of sodium and chlorine ions during electrovalent bonding.

Taking a look at a heterogeneous mixture;

It refers to the mixtures that are not thoroughly mixed and uniform in composition.

On the other hand, homogeneous mixtures are formed when a substance i.e. solute (here, it is the salt crystal) is being added to a cool liquid(solvent) is thoroughly mixed.

From the given information, we are being told that when this single salt crystal is added to the cool liquid, large crystals are formed.

This implies that the formation of large crystals is brought about by the action of crystaliization rendering the liquid to be a homogeneous mixture.

We can therefore conclude that the correct statement about the original cool liquid is in Option D.

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Related Questions

3. 79.0 grams of water was produced with a percent yield of 75.0%. How many grams of
oxygen did he start with?

4. 2.00 moles of oxygen gas at STP will produce how many grams of water, if the percent
yield is 82.0%?

Answers

Answer:

Explanation:

3 )

18 grams of water contains 16 grams of oxygen .

Let the grams of oxygen needed be m .

yield is 75%

Only 75 % of m will make water .

.75 m will form water .

water formed by .75 m of oxygen = 18 / 16 x .75 m

Given that

18 / 16 x .75 m = 79

m = (16 x 79) / ( 18 x .75 )

= 93.63 grams .

So oxygen required is 93.63 grams .

4 )

One mole of water contains 0.5 moles of oxygen.

2 moles of oxygen will make 2 /,5 = 4 moles of water .

percent yield is 82 % ,

so water produced = .82 x 4 = 3.28 moles of water.

A roller coaster approaches a hill,
traveling at 40 m/s. The roller
coaster has a mass of 800 kg.
When it reaches the top of the hill,
it has exactly zero velocity. What
is the height of the hill?

Answers

Answer:

the height of the hill is 30 feet tall

A solution contains one or more of the following ions: Ag , Ca2 , and Co2 . Lithium bromide is added to the solution and no precipitate forms. An excess of lithium sulfate is then added to the solution and a precipitate forms. The precipitate is filtered off and lithium phosphate is added to the remaining solution, producing a precipitate. Which ions are present in the original solution

Answers

Answer:

[tex]Ca^{2+} and Co^{2+}[/tex]

Explanation:

Given:

A solution contains one or more of the following ions such as Ag, [tex]Ca_2[/tex] and [tex]Co_2[/tex]

Here the Lithium bromide is added to the solution and no precipitate forms

Solution:

Since with LiBr no precipitation takes place therefore Ag+ is absent

Here on adding [tex]Li_2SO_4[/tex] to it precipitation takes place.

Precipitate is as follows,

[tex]Ca^{2+}(aq)+SO_4^2^-(aq)----->CASO_4(s)[/tex]

Thus,

[tex]Ca^2^+[/tex] is present

When [tex]Li_3PO_4[/tex] is added again precipitation takes place.

Therefore the reaction is as follows,

[tex]Co^2^+(aq)+PO_4^3^-(aq)------>Co_3(PO_4)_2(s)[/tex]

Therefore,

[tex]Ca^{2+} and Co^{2+}[/tex] are present in the solution

PLEASE SOMEONE HELP ME WITH THIIS QUESTION

The labels have fallen off three bottles. Bottle A contains a gas, bottle B contains a liquid and bottle C contains a solid. The labels indicate that the compounds have the same number of carbon atoms, one being and alkane, one an alcohol, and the other a carboxylic acid. Suggest the identity of the contents of each bottle, and give reasons for your answer.

Answers

Answer:

The correct answer is - 5 carbon compounds due to low to high intermolecular forces between their molecules.

Explanation:

Bottle C has gas in it and we know that alkane has carbon and hydrogen only which means they have a single sigma bond between them and very low intermolecular forces in between molecules and are present mostly at gaseous state. Thus, bottle C has alkane.

Alcohols have -OH group that can form rarely two pi bonds which means they have intermediate intermolecular force whereas acids have -cooH group with a high molecular force so bottle B with liquid is alcohol and A has acid.

is c10H8 a conductor

Answers

Answer:

No

Explanation:

Napthalene cannot conduct electricity

Why boiling point is less at hilly station?

Answers

The atmospheric pressure at high altitudes like hill station is less than at the sea level. Thus, vapour pressure will equal atmospheric pressure at a comparatively low temperature. Thus, the boiling point of water is reduced less than at sea level.

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Cual es la longitud de onda de un foton emitido durante la transicion desde el stado n=5 al estado n=3 en atomo Hidrogeno? Dar como respuesta de la longitud de onda en nm (nanometros)

Answers

Answer:

1302 nm

Explanation:

Del formulario de Rydberg para longitud de onda

1 / λ = R (1 / nf ^ 2 - 1 / ni ^ 2)

1 / λ = 1.097 × 10 ^ 7 (1/3 ^ 2 - 1/5 ^ 2)

1 / λ = 1.097 × 10 ^ 7 (0.11 - 0.04)

1 / λ = 1.097 × 10 ^ 7 (0.07)

= 1,302 × 10 ^ -6 m

o 1302 nm

TIME REMAINI
166:31:2
Which statement best describes why computer models are useful in science?
O
They can store and process data to make accurate weather predictions.
O They are used to create more complex representations of large systems.
O They cannot be revised after they are developed, tested, and shared with others.
They can be used to accurately make predigtions without scientific evidence.

Answers

Answer:

A. They can store and process data to make accurate weather predictions.

Explanation:

Evidentially its very accurate and useful in Science like making accurate Weather predictions.

hope i helped,

Calculate the mass percent of carbon,oxygen, nitrogen and hydrogen in acetamide, C2H5NO.
Molar Mass:
O=16, N=14,C=12, H =1.

Answers

Answer:

40.68 % C

23.73 % N

8.47% H

27.12% O

Explanation:

The mass percent of an element X in a compound is calculated as the molar mass (MM) of X multiplied by the number of atoms of X in the compound, divided into the molecular weight (MW) of the compound, as follows:

mass percent of X = (MM(X) x number of atoms of X)/MW compound x 100

Thus, we first calculate the MW of acetamide (C₂H₅NO) by using the molar mass of the chemical elements C, H, N and O:

MW(C₂H₅NO) = (12 g/mol C x 2) + (1 g/mol H x 5) + 14 g/mol N + 16 g/mol O = 59 g/mol

Now, we can calculate the mass percent of each element (C, H, N, O) in C₂H₅NO:

Mass percent of C (2 atoms of C in 1 molecule of C₂H₅NO):

          % mass C = (12 g/mol x 2)/(59 g/mol) x 100 = 40.68 %

Mass percent of N (1 atom of N in 1 molecule of C₂H₅NO):

       % mass N = (14 g/mol x 1)/(59 g/mol) x 100 = 23.73 %

Mass percent of H (5 atoms of H in 1 molecule of C₂H₅NO):

       % mass H = (1 g/mol x 5)/(59 g/mol) x 100 = 8.47 %

Mass percent of O (1 atom of O in 1 molecule of C₂H₅NO):

       % mass O = (16 g/mol x 1)/(59 g/mol) x 100 = 27.12 %

The sum of the mass percents has to be equal to 100%:

40.68 % C + 23.73 % N + 8.47% H + 27.12% O = 100%

what is the temperature in kelvins of 23 Celsius? hurry pls

Answers

Answer:

23°C + 273.15 = 296.15K

I HOPE ITS RIGHT IF NOT THEN SORRY

HAVE A GREAT DAY :)

Using salt and ice to make ice cream is an example of:

Answers

Answer:

An exothermic reaction

Explanation:

Which of these provides the most creative explanation for how rocks are made at present?
Law of Superposition
O Law of Unconformities
Principle of Uniformitarianism
O Principle of Original Horizontality

Answers

Answer:

Principle of Original Horizontality

Name the following compound NiBr2?

Answers

Answer:

the Name of NiBr2 is

Nickel(II) bromide

Nickel(II) bromide | NiBr2 - PubChem.
Synonyms: Nickel(II) bromideNickel dibromideDibromonickelNickelous bromideNickel ...
Molecular Formula: NiBr2 or Br2Ni
PubChem CID: 278492

i) Interpret the chemical equation in terms of quantitative aspect.

C3H8(g) + 5O2(g)->3CO2(g) + 4H2O(1/ce)

ii) Then, interpret it in terms of qualitative aspect. ​

Answers

Answer:

Quantitative aspect: one mole of propane reacts with five moles of oxygen ( combustion ) to produce three moles of carbon dioxide and four moles of water.

Qualitative aspect: A colourless gas ( propane ) burns with a blue flame ( combination ) to form a colourless gas that turns lime water milky and drops of colourless liquid that turn anhydrous copper (ii) oxide from blue to white.

The chemical equation in quantitative aspect can be interpreted as  1 mole of propane reacts with 5 moles of oxygen to give 3 moles of carbon dioxide and 4 moles of water and in qualitative aspect a colorless gas is released which burns with blue flame.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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if shoto todoroki has a half hot half cold quirk and he eats a ice cube does one half melt and one half freeze ​

Answers

Answer:

in a way yes and no

Explanation:

shoto can control the temperature of both of his quirks so one can over power the other

he can melt the ice with the fire

and freeze the fire over the ice

hope it helps

calculate the volume in L od 2.11mol/L CuSo4(aq) solution that contains 0.41 mol copper(2) sulfate

Answers

Answer:

0.194L

Explanation:

Molarity of a solution is its molar concentration, and can be calculated using the formula:

Molarity = no. of moles (n) ÷ volume (V)

According to this question, the molar concentration/molarity of a solution of copper sulfate (CuSO4) is 2.11mol/L and contains 0.41 mol CuSO4. The volume can be calculated as follows;

Volume = no. of moles ÷ molarity

Volume = 0.41mol ÷ 2.11mol/L

V = 0.194 liter

Match the vocabulary words with their definitions.

1. an instrument to measure magnetism
megawatt
2. a system for the production of controlled nuclear energy
reactor
3. a million watts; thousand kilowatts
infrared
4. invisible radiation with waves longer than red
magnetometer
5. an engine in which a wheel turns by the force of wind, water, or steam
turbine

Answers

Answer:

1. magnetometer, 2. reactor, 3. megawatt, 4. infrared, 5. turbine.

Explanation:

A magnetometer is an electronic instrument used to measure magnetic fields.

(1. an instrument to measure magnetism - magnetometer)

A reactor is a device used for the production of controlled nuclear energy, there are two principles in which nuclear reactors can be based: (i) Fission, (ii) Fusion.

(2. a system for the production of controlled nuclear energy - reactor)

A million watts equals a megawatt, a power SI unit.

(3. a million watts; thousand kilowatts - megawatt)

Infrared radiation corresponds to electromagnetic waves whose wavelength is between 0.7 to 1000 micrometers.

(4. invisible radiation with waves longer than red - infrared)

A turbine is mechanical device which generates mechanical work at the expense of fluid energy.

(5. An engine in which a wheel turns by the force of wind, water or steam - turbine)

What is the name of a hydrocarbon that has the formula CH3(CH2)4CCH?

6-heptyne
1-heptene
1-heptyne
6-heptene

Answers

The name of the hydrocarbon with formula CH₃(CH₂)₄CCH  has been 1-heptyne. Therefore, option C is correct.

What are hydrocarbons ?

The hydrocarbon has been given as the organic compound with the carbon and hydrogen chain. The molecules are bonded by the covalent bonds.

The hydrocarbon has been named established on the number of carbon in the structure and the bond. The hydrocarbon with single bond has -ane suffix, the double bond hydrocarbon has -ene suffix, and the triple bond hydrocarbon has -yne suffix.

The given hydrocarbon has seven carbon atoms,So the name has been hept. In the presence of a triple bond in the structure, the suffix -yne has been added to it.

Thus, option C is correct.

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Answer:

C. 1-heptyne

Explanation:

Jack was camping. He put a can of baked beans on his campfire, without opening the lid. The can exploded. What happened?

Answers

Answer:

Too much steam expands within the can, causing it to explode

Explanation:

Beans contain water, and when water is heated, steam is created. As the steam increases, there's less and less room for it to go. The built up pressure causes the can to explode.

El tipo de enlace en los compuestos: NaF , SO2 e I2 ,son respectivamente de acuerdo a sus electronegatividades que son las siguientes: Na = 0.9 F= 4.0 S= 2.6 I =2.7 F=4.0

Answers

Respuesta:

NaF: Enlace iónico

SO₂: Enlace covalente polar

I₂: Enlace covalente apolar

Explicación:

El tipo de enlace entre 2 elementos depende de la diferencia de electronegatividad.

Si ΔEN = 0, el enlace es covalente apolar.Si 0 < ΔEN ≤ 1.7 , el enlace es covalente polar.Si ΔEN > 1.7 , el enlace es covalente iónico.

NaF

ΔEN = |EN(Na)-EN(F)| = |0.9-4.0| = 3.1

El enlace es iónico.

SO₂

ΔEN = |EN(S)-EN(O)| = |2.6-3.5| = 0.9

El enlace es covalente polar.

I₂

ΔEN = |EN(I)-EN(I)| = |2.7-2.7| = 0

El enlace es covalente apolar.

If 0.735J of heat is added to 0.9916g of water, how much will the temperature increase?


0.238 oC

0.177 oC

0.310 oC

1.78 oC

Answers

Answer:

1.78 oC i think -_-

Explanation:

Have a great day-...

the setup below was used to investigate the reaction between metals and water
i.)identify solid X and state its purpose
ii.)write a chemical equation for the reaction that produces the flame​

Answers

Answer:

I hope it helps you

Explanation:

make me brainlest

Solid X  is glass wool and is used to generate the flow of steam .Chemical equation for reaction between metal and water is metal hydroxide and hydrogen gas.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

Learn more about chemical equation,here:

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Characteristics of a mixture?

Answers

Answer:

the substance mixture can be sperate by filtration, distillation, and freezing.

Characteristics of mixtures
The substances in a mixture can be separated using physical methods such as filtration, freezing, and distillation.
There is little or no energy change when a mixture forms (see Enthalpy of mixing).
Mixtures have variable compositions, while compounds have a fixed, definite formula.

Identifica las formas de energía mecánica
(cinética y potencial) que tienen lugar en diferentes puntos del movimiento en
un sistema mecánico (caída libre, montaña rusa, péndulo).

Answers

2 Tipos de Energía Mecánica

2.1 1. Energía hidráulica

2.2 2. Energía eólica

2.3 3. Energía Mareomotriz

3 Ejemplos de Energía Mecánica

3.1 1. Planta hidroeléctrica

3.2 2. Máquinas de Vapor

3.3  3. Motor de Combustión interna

3.4 4. Molinos de Viento

3.5  5. Un Juego de Billar

3.6  6. Motor eléctrico

3.7  7. Locomotora

3.8  8. Bala

3.9 9. Una pistola de Dardos

3.10 10. Pelota sobre una mesa

https://www.aura-energia.com/ejemplos-de-energia-mecanica/

sodium carbonate decahydrate crystals were left exposed on a watch glass for two days

(a)name the property of salts investigated in the above experiment?

Answers

I think sublimation because sublimation is the process by which substances change back to gases immediately

If you have a 60 Watt light bulb and a 75 Watt light bulb that are going to stay lit for 2.5 days, how many photons with a wavelength of 650 nm would it take to get the job done?

Answers

Answer:

I think 4 days

Explanation:

I just think it is 4 i think i am worng tho

Describe how you would prepare a supersaturated solution

Answers

Answer:

A supersaturated solution contains more dissolved solute than required for preparing a saturated solution and can be prepared by heating a saturated solution, adding more solute, and then cooling it gently. Excess dissolved solute crystallizes by seeding supersaturated solution with a few crystals of the solute.

Explanation:

An unknown compound has the following chemical formula: NxO
where x stands for a whole number.
Measurements also show that a certain sample of the unknown compound contains 5.2 mol of nitrogen and 2.65 mol of oxygen
Write the complete chemical formula for the unknown compound.

Answers

Taking into account the definition of empirical formula, the complete chemical formula for the unknown compound is N₂O.

The empirical formula of a chemical compound shows the ratio between the atoms of the compound. That is, it indicates which elements are present and the minimum ratio in whole numbers between their atoms. The empirical formula is the simplest chemical formula for a chemical compound, which is why it is also called the minimum formula.

The empirical formula must be expressed using integer relationships, then to obtain this formula, divide the numbers of moles by the smallest result of them. In this case:

Nitrogen: [tex]\frac{5.2 moles}{2.65 moles}[/tex]= 1.96 moles ≅ 2 moles

Oxygen [tex]\frac{2.65 moles}{2.65 moles}[/tex]= 1 mole

Being the chemical formula of hte compound NxO, where x stands for a whole number, this indicates that the elements N and O are in the compound in a whole number ratio of x: 1.  Then, as in the empirical formula, the numbers of moles must be expressed in whole numbers, as previously calculated, the value of x must be 2.

In summary, the complete chemical formula for the unknown compound is N₂O.

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How does the arrangement of particles determine the physical properties of different states of matter?​

Answers

Answer:

See explanation

Explanation:

Matter may exist in three phases; solid, liquid and gas. The state in which matter exists depends on the extent of intermolecular forces operating in the substance.

In solid particles, the molecules that compose the solid are close together because the molecules of a solid do not move from place to place but they continue to vibrate about their fixed position.

For liquids, the molecules that compose a liquid are in random motion but are less energetic than molecules of a gas.

In gases, the molecules are not held together at all. The molecules of a gas have the highest degree of freedom. They move from one point another at a high velocity.

Hence, the order of increasing degree of movement of the particles in different states of matter = solids<liquids< gases.

Solids have well arranged particles, the molecules of a liquid are a little more disorderly than liquid particles while gas particles are the most disorderly of all the states of matter.

Which of the following are properties of metalloids?
A. Semi-conductors
B. All of these
C. React like metals sometimes
D. React like non-metals sometimes

Answers

Answer:

all of these are properties of metalloids

Answer:

The answer is B. All of these

Explanation:

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