A 10 M concentrated stock solution of NaCl is used to prepare 2 liters of diluted 1 M
solution. Which of the following is true for the process used to achieve the required
dilution? (5 points)
O The volume of the solvent used is less than 0.1 liters.
O The volume of stock solution used is less than 0.1 liters.
The volume of stock solution used is more than 2 liters.
The volume of the solvent used is less than 2 liters.

Answers

Answer 1

Answer: It is true for the process used to achieve the required dilution that volume of the solvent used is less than 2 liters.

Explanation:

Given: [tex]M_{1}[/tex] = 10 M,       [tex]V_{1}[/tex] = ?

[tex]M_{2}[/tex] = 1 M,       [tex]V_{2}[/tex] = 2 L

The volume of stock solution is calculated as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\10 M \times V_{1} = 1 M \times 2\\V_{1} = 0.2 L[/tex]

A solution which contains small amount of solute is called a dilute solution. Whereas a solution which contains more amount of solute is called a concentrated solution.

The stock solution is used for dilution and hence, it acts as a solvent. Its calculated volume is 0.2 L.

This means that volume of the solvent used is less than 2 liters.

Thus, we can conclude that it is true for the process used to achieve the required dilution that volume of the solvent used is less than 2 liters.

Answer 2

Answer: The volume of the solvent used is less than 2 liters.

Explanation:


Related Questions

HELP PLEASE!!!!!!!
140 grams of lead (II) nitrate are dissolved in water then mixed with a solution containing 75 grams of sodium chloride. The reaction creates the precipitate, lead (II) Chloride, and a solution of sodium nitrate. How many grams of lead (II) Chloride can be produced given the initial amount of lead (II) nitrate?

Answers

Answer:

    Try a grams calculator, Its pretty to nd one :D

Explanation:

PLZ HELP... provide the correct coefficients to balance the chemical equation C2H6+O2 -> CO2 + H20

Answers

2 = C2H6
7 = O2
4 = CO2
6 = H2O

If you have 500 mL of a 0.10 M solution of the acid, what mass of the corresponding sodium salt of the conjugate base do you need to make the buffer with a pH of 7.74 (assuming no change in volume)

Answers

Answer:

5.90g of NaClO are needed

Explanation:

Assuming the weak acid is HClO pKa = 7.54

To solve this question we must use the H-H equation for acids:

pH = pKa + log [A-] / [HA]

Where pH is the pH we want = 7.74

pKa is pKa of the weak acid = 7.54

[A-] could be taken as the moles of the conjugate base (Moles NaClO) and [HA] moles weak acid = 0.500L * (0.10mol/L) = 0.0500 moles HClO

Replacing:

7.74 = 7.54 + log [NaClO] / [0.0500 moles]

0.20 = log [NaClO] / [0.0500 moles]

1.5849 = [NaClO] / [0.0500 moles]

Moles NaClO = 0.0792 moles

The mass is: -Molar mass NaClO = 74.44g/mol-

0.0792 moles * (74.44g / 1mol) =

5.90g of NaClO are needed

5.90g of NaClO mass of the sodium salt of the conjugate base are need to make the buffer with a pH of 7.74.

What is pH?

pH tells the solution is acidic or basic. pH means potential hydrogen.

Given,

Assuming the weak acid is (hypochlorous acid) HClO

pKa = 7.54

[tex]pH = pKa + \dfrac{ log[A-] }{ [HA]}[/tex]

(Moles NaClO) and [HA] moles weak acid = 0.500L * (0.10mol/L) = 0.0500 moles HClO

Putting the value

[tex]7.74 = 7.54 + \dfrac{ log[NaClO] }{ [0.0500 moles]}\\0.20 =\dfrac{ log}{[0.0500 moles]} \\1.5849 =\dfrac{ [NaClO]}{Moles\;of\; NaClO } = 0.0792 moles[/tex]

The mass is

Molar mass NaClO

= 74.44g/mol - 0.0792 moles * (74.44g / 1mol)

=5.90g of NaClO are needed

Thus, 5.90g of NaClO are needed.

Learn more about pH, here:

https://brainly.com/question/15289741

True or False
a. The cones in our eyes detect color, while the rods perceive brightness.
b. In white light, white objects absorb all the colors.
c. At night, when light is dim, our cones are not activated so objects will appear as their normal color.
P.
d. Violet has the longest wavelength which is why it gets refracted the most.
V
e. The angle of incidence always equals the angle of reflection.

Answers

true

false

true

true

false

Which tool was most likely used in a procedure if the lab report shows that 300 mL of water was used?
A volumetric flask
A thermometer
A pipette
A graduated cylinder

Answers

The answer is A - Volumetric Flask!

Which equation correctly represents the dissociation of a strong acid in water?



Question 26 options:

CH3COOH ↔H++ CH3COO−

NaOH →Na++OH−

HCl →H+ +Cl−

NH3+ H2O↔ NH4++ OH−

Answers

The equation that correctly represents the dissociation of a strong acid in water is as follows: HCl → H+ + Cl−

What is acid dissociation?

Acid dissociation is the process by which an acid breaks up into it's constituent ions in an aqueous solution.

Acids are known to contain hydrogen ions (H+), hence, dissociate into H+ and an anion.

A strong acid like HCl dissociates completely in an aqueous solution while a weak acid does not dissociate completely.

According to this question, hydrogen chloride (HCl) is said to dissociate into hydrogen ion (H+) and chloride (Cl-) according to the following expression:

HCl → H+ + Cl−

Learn more about acid dissociation at: https://brainly.com/question/4363472

#SPJ1

does neutrons have a positive charge​

Answers

Answer:

neutrons have no charge

Answer:

No it doesnt

Explanation:

Find the moles of 127.5g of NaCl.

Answers

Answer:

n = 2.18 moles

Explanation:

Given that,

Mass = 127.5g

Molar mass of NaCl = 58.44 g/mol

We need to find the number of moles. We know that,

No. of moles = Given mass/molar mass

Put all the values,

[tex]n=\dfrac{127.5\ g}{58.44\ g/mol}\\\\n=2.18\ moles[/tex]

Hence, there are 2.18 moles of 127.5g of NaCl.

The partial pressure of N2 in a mixture of gases, where the total pressure is 1.50 atm, is 300. torr. What is the mole fraction of N2

Answers

Answer:

The mole fraction of N₂ is 0.26.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

PT = PA + PB

This relationship is due to the assumption that there are no attractive forces between the gases.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. The mole fraction is a dimensionless quantity that expresses the ratio of the number of moles of a component to the number of moles of all the components present.

So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

PA = XA * PT

In this case:

PA= PN₂= 300 torrXA=XN₂= ?PT= 1.50 atm= 1140 torr (being 1 atm= 760 torr)

Replacing:

300 torr= XN₂*1140 torr

Solving:

[tex]X_{N_{2} } =\frac{300 torr}{1140 torr}[/tex]

XN₂= 0.26

The mole fraction of N₂ is 0.26.

Write the chemical reaction happening in self heating cans …..

Answers

[tex]\huge\mathsf{\red{\underline{\underline{Answer}}}}[/tex]

[tex]{\green{\dashrightarrow}}[/tex]Self-heating cans work through an exothermic chemical reaction between two chemicals. Popular combinations are aluminum and silica, calcium oxide and water, and copper sulfate and zinc. When the two substances combine, the reaction produces enough heat to raise the temperature of the can.

The reaction of an acid and a base will always produce what kind of salt?
A.
a combination of the cation from the acid and the anion from the base
B.
a combination of the cation from a strong base and the anion from a weak acid
C.
neutral salts from the cation of a strong base and the anion from a weak acid
D.
basic salts from the cation of a strong base and a strong acid
E.
depends on the strength of the acid and the base

Answers

Explanation:

E maybe i am not sure or C

A group of students found metamorphic rocks near a campsite. The presence of metamorphic rock is most likely evidence of that the rock formed from .

Answers

Answer:

Igneous or sedimentary rocks.

Explanation:

The presence of metamorphic rock is most likely evidence of that the rock formed from igneous or sedimentary rocks. The igneous rock converted into metamorphic rocks when the rock experience intense heat and pressure within the Earth's crust. These metamorphic rocks are crystalline and often have a “squashed” texture. So due to high temperature and pressure, the metamorphic rock is formed from igneous rock.

If there are 10.00 moles of ascorbic acid(C6H8O6), what is the mass of ascorbic acid?

Answers

Given

no of moles = 10 mol

we know that mass of 1 mole ascorbic acid is 176.12,

mass id 10 mole of ascorbic acid = 10× 176.12

= 1761.2 g

Answer - 1761.2 grams

is A tomato smells rotten a chemical
reaction

Answers

Answer:

yup

Explanation:

because chemical change took place

the reaction cant be reversible

That’s crazy I didn’t know that

Which of these is most likely to create large areas of land subsidence?

Answers

I think it is Global warming

A piece of wood burns to form ash. ____C_____ Water evaporates into steam. ____P_____ A piece of cork is cut in half. ____P_____ A bicycle chain rusts. _____C______ Food is digested in the stomach. _____C______ Water is absorbed by a paper towel. _____P______ Hydrochloric Acid reacts with zinc. _____C______ A piece of an apple rots on the ground. ____C_____ A tire is inflated with air. ____P____ A Plant turns sunlight, CO2, and water into sugar and oxygen. ____C_____ Sugar dissolves in water. ____C_____ Eggs turn into an omelet. _____C______ Milk sours. _____C______ A popsicle melts. _____P_______ Turning brownie mix into brownies. _____C______

Answers

Answer:

A piece of wood burns to form ash - Chemical change

Water evaporates into steam - Physical change

A piece of cork is cut in half. __ Physical change

A bicycle chain rusts. _____Chemical change

Food is digested in the stomach. _____Chemical change

Water is absorbed by a paper towel. _____Physical change

Hydrochloric Acid reacts with zinc. _____Chemical change

A piece of an apple rots on the ground. ____Chemical change

A tire is inflated with air - Physical change

A Plant turns sunlight, CO2, and water into sugar and oxygen. _Chemical change

Sugar dissolves in water - Physical change

Eggs turn into an omelet. _____Chemical change

Milk sours. Chemical change

A popsicle melts. _____Physical change

Turning brownie mix into brownies. Chemical change

Explanation:

Matter undergoes two types of changes: physical changes and chemical changes.

A physical change is one that affects only the physical properties of a substance such as colour, size, shape, etc., and in which no new substances are formed. Physical changes are easily reversible.

Chemical changes are changes which affect the chemical characteristics and properties of a substance such as reactivity, acidity, basicity, etc., resulting in the formation of new substances.

The following changes below are categorized as either physical or chemical changes based on which of the properties of the substance is affected and whether new substances result or not.

A piece of wood burns to form ash - Chemical change

Water evaporates into steam - Physical change

A piece of cork is cut in half. __ Physical change

A bicycle chain rusts. _____Chemical change

Food is digested in the stomach. _____Chemical change

Water is absorbed by a paper towel. _____Physical change

Hydrochloric Acid reacts with zinc. _____Chemical change

A piece of an apple rots on the ground. ____Chemical change

A tire is inflated with air - Physical change

A Plant turns sunlight, CO2, and water into sugar and oxygen. _Chemical change

Sugar dissolves in water - Physical change

Eggs turn into an omelet. _ Chemical change

Milk sours - Chemical change

A popsicle melts. _____Physical change

Turning brownie mix into brownies - Chemical change

how much water should be added to 80 grams of common salt so as to obtain 20% salt solution​

Answers

concentration of solution is 20%

Mass of solute( common salt) is 80g

take the amount of water as x

mass of the solvent = (80+x)

We know, concentration of solution = (mass of solute/mass of solution)×100

20=(80/80+x)×100

80+x=80×5 ( we devide the both side by 20)

x= 400-80

x=320 g

10. A community currently uses coal to produce electricity. What would be an
advantage of using nuclear energy instead? *
a. Uranium is safer than coal
b. Nuclear energy produces no waste
c. Uranium deposits are more abundant than coal
d. Nuclear energy does not produce greenhouse gases

Answers

Answer:

c

Explanation:

I'm pretty sure it's C. If it is not then it might be d

Which of the following are base formulas? (Choose 2)
CH3OH
NH3
CH4
NaOH
HNO3
H2SO4

Answers

Answer:

Na0H

Ca(OH)2

NH40H

Are the answers

What is the smallest kind of volcano

Answers

Answer:

Cinder cones

Explanation:

What are five different types of air pollutant each

Answers

5 types of air pollution would include: Carbon Monoxide, Lead, Nitrogen oxides, sulfur oxides. I only know those 4 actually… hope it helped

What does the electrostatic force do inside the nucleus?
A. It adds to the strong nuclear force.
B. It holds the protons and neutrons together. C. It causes the protons to repel each other.
D. It cancels out the strong nuclear force​

Answers

Answer:

C. it causes the protons to repel each other.

why are vials made from vapor glass stronger then typical vials?
I.they contain aluminum instead of boron.
II. They submerged in hot salt bath.
III. They formed out of long glass tubes.

A) I
B) I and II
C) I and III
D) I, II, and III

Answers

Answer:

2

Explanation:

I'm not that sure plz tell me if this is right

How many moles of aluminum sulfide will be produced if 12 moles of Sg react?

Answers

Answer:

Molar mass = [9(12.0)+8(1.01)+4(16.0)] = 180.1 g/mol Moles = 112 g 1 mol x 180.1 g = 0.622 mol (3 sig figs)

Explanation:

What volume of water would you add to 35.81 mL of 1.59 M acetic acid solution to make it a 0.97 M?

Answers

Answer: A volume of 58.69 mL of water would you add to 35.81 mL of 1.59 M acetic acid solution to make it a 0.97 M.

Explanation:

Given: [tex]V_{1}[/tex] = 35.81 mL,       [tex]M_{1}[/tex] = 1.59 M

[tex]V_{2}[/tex] = ?,               [tex]M_{2}[/tex] = 0.97 M

Formula used to calculate volume is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\1.59 M \times 35.81 mL = 0.97 M \times V_{2}\\V_{2} = 58.69 mL[/tex]

Thus, we can conclude that a volume of 58.69 mL of water would you add to 35.81 mL of 1.59 M acetic acid solution to make it a 0.97 M.

Witch statement about greenhouse gases is false

Answers

Answer:

???

Explanation:

3.What is evaporation?
(1 Point)

change from solid to liquid

change from solid to gas

change from liquid to solid

change from liquid to gas

change from gas to solid

change from gas to liquid
4.What happens to the motion of particles after evaporation?
(1 Point)

faster

slower
5.What happens to the kinetic energy of particles after evaporation?
(1 Point)

increased

decreased
6.What happens to the distance between particles after evaporation?Immersive Reader
(1 Point)

smaller

wider

Answers

Evaporation is the change from a liquid to gas

A chloride ion, : Cl :i– , acts as a alternate base when it combines with


A. a OH– ion

B. a K+ ion

C. an H– ion

D. an H+ ion

Answers

Answer:

D

Explanation:

The answer is D...and if you need explanation you can comment

When temperature drops, (for example from 20 degrees celsius to 10 degrees celsius)

a.) energy increases

b.) particles move slower

c.) particles collide more often

d.) pressure increases

Answers

Answer:

In the Celsius scale each degree is one part of 100 degrees. This is because in this scale the difference between boiling and freezing temperatures of water is 100 ° - 0 ° = 100 °, so one degree Celsius is one part of 100.

In the Farhenheit scale, each degree is one part of 180 degrees. This is because in this scale the difference between the boiling and freezing temperatures are 212 ° - 32 ° = 180°, so one degree Fahrenheti is one part of 180.

That means that 1 °C is a larger amount than 1 °C, so 20°C is a larger amount than 20°F.

Conclusion: 20 degree change represents a larger change in Celsius scale.

Explanation:

In the Celsius scale each degree is one part of 100 degrees. This is because in this scale the difference between boiling and freezing temperatures of water is 100 ° - 0 ° = 100 °, so one degree Celsius is one part of 100.

In the Farhenheit scale, each degree is one part of 180 degrees. This is because in this scale the difference between the boiling and freezing temperatures are 212 ° - 32 ° = 180°, so one degree Fahrenheti is one part of 180.

That means that 1 °C is a larger amount than 1 °C, so 20°C is a larger amount than 20°F.

Conclusion: 20 degree change represents a larger change in Celsius scale.

A student observed an example in which all of the offspring of an organism have the same
genetic material, which is identical to the parent organism. Based on this the student can
conclude that this organism
A.
is unicellular
B.
makes its own food.
C.
reproduces asexually.
D.
has a lot of genetic diversity.

Answers

The answer is C I believe because it makes sense
Other Questions
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