What is the molarity of a 100 mL solution that contains 2.00 g KCL

Answers

Answer 1

Answer:

The molarity will be "0.26 M".

Explanation:

The given values are:

Mass,

= 2.00 g

Volume of solution,

= 100 mL

or,

= [tex]\frac{100}{1000}[/tex]

= [tex]0.1 \ L[/tex]

Molar mass of KCl,

= 74.5 gm

Now,

Moles of KCl will be:

=  [tex]\frac{Given \ mass}{Molar \ mass}[/tex]

=  [tex]\frac{2}{74.5}[/tex]

=  [tex]0.026[/tex]

hence,

The molarity will be:

=  [tex]\frac{Moles \ of \ solute}{Volume \ of \ solution}[/tex]

On substituting the values, we get

=  [tex]\frac{0.026}{0.1}[/tex]

=  [tex]0.26 \ M[/tex]


Related Questions

need help i will give you thanks:)

Answers

Answer:

Precipitation

Explanation:

Precipitation is when water falls from the clouds back to earth as rain, snow, or hail. The water returns to the rivers to continue the water cycle. So, the answer is D, precipitation.

I hope this helps :)

Answer:

Vapor Information

Explanation:

Atmospheric rivers are relatively long, narrow regions in the atmosphere like rivers in the sky that transport most of the water vapor outside of the tropics. Not all atmospheric rivers cause damage, and most are weak systems that often provide beneficial rain or snow that is crucial to the water supply.

(You're welcome and have a nice day/night Ma'am/Sir.)

what is the preasure in atmospheres of 20 mol of nitrogen gas in 36.2 L cylinder at 25 degrees C?

Answers

Answer:

P = 13.5 atm

Explanation:

Given that

No. of moles, n = 20 moles

Volume of nitrogen gas = 36.2 L

Temperature = 25°C = 298 K

We need to find the pressure of the gas. Using the ideal gas equation

PV = nRT

Where

R is gas constant, [tex]R=0.082057\ L-atm/K-mol[/tex]

So,

[tex]P=\dfrac{nRT}{V}\\\\P=\dfrac{20\times 0.082057\times 298}{36.2 }\\\\P=13.5\ atm[/tex]

so, the pressure of the gas is equal to 13.5 atm.

Will mark brainly read it make sense no funny business

Answers

Answer:  mixed

compound

Explanation:

The evidence of chemical changes with an example of each (include all 5)

Answers

Answer:

??????????

Explanation:

Based on information from the periodic table, what does this image represent?

A. A neutral fluorine atom
B. A negatively charged fluoride atom
C. A positively charged fluoride ion
D. A neutral neon atom

Answers

Based on the information given, the image represents a negatively charged fluoride atom (Option B)

Composition of atom

An atom is composed of a centrally placed nucleus (containing protons and neutrons) and a cloud of electrons revolving round it.

How to determine the charge

From the question given above, the following data were obtained:

Proton = 9Neutron = 10Electron = 10Charge =?

Charge = Proton – Electron

Charge = 9 – 10

Charge = –1

Note

Element with proton number of 9 is fluorine

Thus, we can conclude that the image represents a negatively charged fluoride ion (Option B)

Learn more about composition of atoms:

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Answer:

B

Explanation:

Please help me with this homework I really need help with this homework

Answers

Answer:

For the first question its C, Gas

For the second one table

Explanation:

The faster particles move, the more kinetic energy they have. Within a given substance, such as water, particles in the solid state have the least amount of kinetic energy. Particles in the liquid state move faster than particles in the solid state. Therefore, they have more kinetic energy.

Which of the following movements of ocean water has the greatest direct effect on the growth of producers.
A. Upwelling
B. Deep Current
C. Surface Current
D. Convection Current

Answers

Answer:

A- Upwelling

Explanation:

What is the mass of 2.40 mol H2O?
Answer in units of g.

Answers

I AM MEMELORD!!!!! SLAYER OF THE KARENS!!! SPEAKER OF THE THE MEMES. APPROACH SPEAKER AND ASK YOUR QUESTION! I AM MEMELORD!!!!! SLAYER OF THE KARENS!!! SPEAKER OF THE THE MEMES. APPROACH SPEAKER AND ASK YOUR QUESTION! I AM MEMELORD!!!!! SLAYER OF THE KARENS!!! SPEAKER OF THE THE MEMES. APPROACH SPEAKER AND ASK YOUR QUESTION!vuillokookioobznzksksksksksksisis

Answer:

204

Explanation:

A substance that catches fire and burns in air is said to be

Answers

Answer:

combustible.

Explanation:

The substances which burn in air are called combustible. Oxygen (in air) is essential for combustion. During the process of combustion, heat and light are given out.

Hope this helped!!!

Answer: flammable

Explanation:

What is the mass of a substance that has a specific heat of 0.449 J/g°C and raises its temperature in a calorimeter from 20°C to 90°C when it releases 12,300 J of energy?

Answers

Answer:

6.094 j/g°C is the answer

A construction company clears away 75 percent of a forest area for urban development. What will most likely happen to the carrying capacity and the populations of organisms in the remaining forest area?

Answers

The answer is the population of organisms will decrease with loss of habitat, and there is more room for carrying capacity. Hope this helps! Mark brainly please!

Answer:

B. Their populations will decrease, and the carrying capacity will increase.

Explanation:

Can you balance an Egg on the Spring Equinox? R: Restate the Question * A: Answer the question * C: Cite your evidence E: Explain your answer *

Answers

Answer:

No you cannot balance an Egg on Spring Equinox without practice and the right egg

Explanation:

No you cannot balance an Egg on the spring Equinox and this is because it is just a Myth, according to Dr Harry E. Keller,

Balancing of an egg ( making an egg stand upright ) takes practice, Getting the right egg ( i.e. an egg with its yolk placed at the center of the egg ) and can be done anytime of the day and not just on spring equinox

What causes the water to bend and the soda cans to roll?

Answers

Answer:

This is called static electricity, which means “non-moving electricity” The electrons have the power to pull very light objects (with a positive charge) toward them – like the soda can

Explanation:

According to the law of conservation of matter, the number of_______is not changed by a chemical reaction
A. Molecules
B. bonds
C. products
D. atoms

Answers

Answer:

Atoms

Explanation:

According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.

A student makes a sound by blowing into the mouth of an empty soda bottle. How could the student make the sound louder?

Answers

Answer:

Increase the amplitude by blowing with more force.

Explanation: I answered this.

Answer:

Increase the amplitude by blowing with more force

Explanation:

I took the test

A sample of solid candle wax is put into a pot on the stove. Heat energy is transferred to the wax at a constant rate by the burner on the stove. Match the segments on the graph to the correct description of what is happening to the wax.
(match them)
Gaseous wax heating
melting
boiling
liquid wax heating
solid wax heating
A-B
B-C
C-D
D-E
E-F

Answers

Answer:

A-B : solid wax heating

B-C : melting

C-D : liquid wax heating

D-E : Boiling

E-F : Gaseous wax heating

A sample of solid candle wax is put into a pot on the stove. Heat energy is transferred to the wax at a constant rate by the burner on the stove. A-B is solid wax heating, B-C is melting, C-D is liquid wax heating, D-E is Boiling and E-F is Gaseous wax heating.

What is heating ?

A heating system is a device that uses thermal energy to keep indoor temperatures within a house, workplace, or other structure at a comfortable level. portion of an HVAC system frequently. A heating system can be dispersed or centrally located.

The movement of minuscule atoms, molecules, or ions in solids, liquids, and gases produces heat energy. From one thing to another, heat energy can be exchanged. Heat is the flow or transfer that occurs as a result of the temperature differential between two objects.

When heat is applied to some substances, chemical changes or reactions occur that result in the formation of one or more new compounds with unique features.

Thus, A-B is solid wax heating, B-C is melting, C-D is liquid wax heating, D-E is Boiling and E-F is Gaseous wax heating.

To learn more about heating, follow the link;

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what is the enthalpy for 2H2S(g) + 3O2(g) -> 2H2O(I) + 2SO2(g). (∆H)​

Answers

Answer:

2H2S (g) + 3O2 (g) → 2H2O (l) + 2SO2 (g)

Calculate ΔH° from the given data. Is the reaction exothermic or endothermic?

ΔH°f (H2S) = -20.15 kJ/mol; ΔH°f (O2) = 0 kJ/, mol; ΔH°f (H2O) = -285.8 kJ/mol; ΔH°f (SO2) = -296.4 kJ/mol

Which reaction type is really part of another type of reaction but treated separately? Explain

Answers

Answer:

Oxidation - reduction reaction which is called redox reaction.

Explanation:

The type of reaction that is a part of another type but treated separately is called Oxidation - reduction reaction.

Thus is because they usually involve 2 separate half reactions which are oxidation reactions that involve loss of electrons and then reduction equations which involve gain of electrons.

They are treated separately for example when sodium reacts with chlorine to form sodium chloride.

2Na + Cl2 = 2NaCl

Now, sodium undergoes oxidation by loosing elctrons and it's half reaction is;

2Na → 2Na​^(+) + 2e^(-)

​​Meanwhile chlorine undergoes reduction by gaining electrons and its half reaction is;

Cl2 + 2e^(-) → 2Cl^(-)

100 pts Horticulture (HURRY)
Which of the following corn pests causes galls to develop on the plant?
blight
rust
smut
mildew

Answers

Answer:

Option C, Smut

Explanation:

Corn smut is a condition in which mushroom-like tumors or galls appear on different part of the plant. This is caused by fungus Ustilago zeae. Corn smut is edible and appears grayish white with spony texture in the early stages of the infection promptly found on corn ear or tassel.

Hence, option C is correct

option c is the right answer❤️

Dimensional analysis is not just for science and math courses; it is
something you can use in everyday life. Let's say you are throwing a
birthday party for your friend, and you want to know how many cakes to
order. You are planning to invite 24 people to the party, and you assume
that each person will eat 1 piece of cake. If each cake will be cut into 8
w
pieces, how many cakes do you need to order? Show your work.

Answers

Answer:

Explanation

so, 1 cake would feed 8 people (if i am understanding correctly) this would mean you would need 3 cakes to feed 24 people.  

1/8*24=3

I really hope this helps! Im sorry i couldnt do more

When magnesium metal is burnt in air it reacts with both oxygen and nitrogen gses giving a white ash write to equatios for the reactions that take place

Answers

Answer:

See explanation

Explanation:

The most important thing to bear in mind when writing chemical reaction equation is that the equation must be balanced. A balanced chemical reaction equation is one in which the number of atoms of each element on the left and right hand sides of the reaction equation is exactly the same.

Equation of magnesium reaction with oxygen

2Mg(s) + O2(g) ------> 2MgO(s)

Equation of magnesium reaction with nitrogen

3Mg(s) + N2(g) ------> Mg3N2(s)

SOMEONE HELP PLS! I missed a day and I need help rn

Answers

Answer:

D

Explanation:

A gas is collected at 30 Celsius and has a pressure of 200 kPa. What pressure would it exert if the temperature changed to 40 Celsius?

Answers

Answer:

[tex]206.6\ \text{kPa}[/tex]

Explanation:

[tex]P_1[/tex] = Initial pressure = 200 kPa

[tex]P_2[/tex] = Final pressure

[tex]T_1[/tex] = Initial temperature = [tex]30^{\circ}\text{C}[/tex]

[tex]T_2[/tex] = Final temperature = [tex]40^{\circ}\text{C}[/tex]

We have the relation

[tex]\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}\\\Rightarrow P_2=\dfrac{T_2}{T_1}P_1\\\Rightarrow P_2=\dfrac{40+273.15}{30+273.15}\times 200\\\Rightarrow P_2=206.6\ \text{kPa}[/tex]

The pressure that would be exerted after the temperature change is [tex]206.6\ \text{kPa}[/tex].

molecular formula of CH2O, 120 g/mol

Answers

The given empirical form aula of compound is CH20

The given molar mass of a compound of 120g/ml

Molar mass of empirical formula
CH20=30g/ml

n= molar mass/ molar mass of empirical formula substitute as follows: n= 120g/ml/30g/ml

n= 4 so, 4 x CH20= C4H8O4

Therefore, the molecular formula of a compound is determined to be C4H8O4

what is the energy needed to start a chemical reaction?

Answers

Answer:

Activation energy is called the energy required to initiate a chemical reaction.

Explanation:

All of the following explains why solar energy a better source of energy except:

Solar energy produces less toxic gas in the atmosphere.
Solar energy can be mined with less damage to ecosystems.
There is less environmental impact when collecting solar energy.
Solar energy is unlimited and easily captured from the Sun.

Answers

Answer:

Solar energy can be mined with less damage to ecosystems

Explanation:

solar energy isint mined, its collected and it is kinda bad for the environment when you mine the metals to get the solar panel

find the average speed of a person who swims 105 m in 70 s

Answers

Answer:

1.5 m/s

Explanation:

105 / 70 = 1.5

Which describes farsightedness?


Distant objects are blurry.

Concave lenses can correct it.






hurrry plz

Objects appear larger when wearing corrective glasses.

Corrective glasses do not change apparent the size of objects.

Answers

distant objects are blurry



i know cuz i have this

To solve this we must have a claeas concept behind Farsightedness and nearsightedness. Therefore, distant objects are blurry,  describes farsightedness. The correct option is option A.

What is farsightedness?

Farsightedness (hyperopia) is a common visual issue in which you can clearly see far things but have fuzzy vision of nearer items. Your capacity to focus is affected by your degree of farsightedness.

Farsightedness is most usually caused by an eyeball that is too short or by a cornea (the transparent layer at the front of the eye) that is not curved enough. Light cannot focus directly on the retina due to these two issues. Light instead concentrates behind the retina, making close-up objects appear fuzzy.

Therefore, distant objects are blurry,  describes farsightedness. The correct option is option A.

To know more about farsightedness, here:

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9)
How many grams are in 4.5 moles of sodium hydroxide (NaOH)?

Answers

There is 40 grams in one mole so there is 179.986 or if u round up 180

Answer:

179.986995

Explanation:

1 mole is equal to 39.99711 grams.

so muitiply 39.99711 by 4.5 and get 179.986995

1. Take 2-3 crystals of potassium permanganate and dissolve them in 100 mL of water.
2. Take out approximately 10 mL of this solution and put it into 90 mL of clear water.
3. Take out 10 mL of this solution and put it into another 90 mL of clear water.
4. Keep diluting the solution like this 5 to 8 times.
5. Is the water still coloured?

Answers

Answer:

2

Explanation:

1. Take 2-3 crystals of potassium permanganate and dissolve them in 100 mL of water.

2. Take out approximately 10 mL of this solution and put it into 90 mL of clear water.

3. Take out 10 mL of this solution and put it into another 90 mL of clear water.

4. Keep diluting the solution like this 5 to 8 times.

5. Is the water still coloured?

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