Help with as many as possible is appreciated! :)
Calculate the molarity of the solutions described below.
a. 10.0 g of sodium chloride is dissolved in 2.0 L of solution.
b. 52.5 g of sugar (C12H22O11) s dissolved in 1.0 L of solution.
c. 120 g of aluminum sulfate is dissolved in 10.0 L of solution.
d. 1.75 g of caffeine (C8H10N4O2) is dissolved in 0.100 L of solution.

Answers

Answer 1

Answer:

a. 0.0855 M

b. 0.153 M

c. 0.0351 M

d. 0.0901 M

Explanation:

a.

Molar mass NaCL= 23.0 +35.5 = 58.5 g/mol

10.0 g* 1 mol/58.5 g = 10.0/58.5 mol

(10.0/58.5) mol/2L = 0.0855 mol/L = 0.0855 M

b.

Molar mass (C12H22O11) =342.3 g/mol

52.5 g*1mol/342.3 g = 52.5/342.3 mol=0.153 mol

0.153 mol/1L = 0.153 M

c.

Molar mass (Al2(SO4)3) =342.2 g/mol

120g* 1 mol/342.2 g =0.351 mol

0.351 mol/10.0L = 0.0351 mol/L = 0.0351 M

d.

Molar mass (C8H10N4O2) = 194.2 g/mol

1.75 g*1mol/194.2 g = 0.00901 mol

0.00901 mol/0.100 L =0.0901 M


Related Questions

How many copper atoms are in 70 grams of copper

Answers

1.10156422119408 moles

Which is a property of every heterogeneous mixture?

The mixture is made up of at least two different states.
The mixture is made up of something dissolved in a liquid.
The composition of the mixture is the same throughout.
The characteristics of the mixture change within a sample.

Answers

Answer:

D.) The characteristics of the mixture change within a sample

Explanation:

Because the guy above me is wrong

Answer:

D.) The characteristics of the mixture change within a sample.

Explanation:

HTH!! Have a good day!!! Don't forget to smile!!!!

which is correct? not sure which is right

Answers

Answer:

butane

Explanation:

Which word equation represents a neutralization reaction? *
base + acid salt + water
base + salt → water + acid
salt + acid base + water
salt + water → acid + base

Answers

Answer:

A

Explanation:

Neutralization reaction is

base + acid ---> salt + water.

A because neutralization

PLEEASE HELP TIMED WILL GIVE BRAINLIEST TO CORRECT ANSWER NLY PLEASEEEE HELPPPP

Answers

Answer:

1) 1.15 mol

2) M=0.45

3) 22.5 mL

4) 6.25 mL

Explanation:

1)

550 mL= 0.55 L

M= mol solute/ L solution

mol solute= M * L solution

mol solute= (2.1 M * 0.55 L )        M=1.15 mol solute

2)

155 mL = 0.155 L

80 g  -> 1 mol NH4NO3

5.61 g -> x

x= (5.61 g * 1 mol NH4NO3)/80 g       x= 0.07 mol NH4NO3

M=(0.07 mol NH4NO3)/0.155 L         M=0.45

3) M1V1=M2V2

V1= M2V2/M1

V1= (0.500 M * 0.225 L)/5.00 M             V1=0.0225 L =22.5 mL

4) M1V1=M2V2

V1= M2V2/M1

V1= (0.25 M * 0.45 L)/ 18.0 M

V1=6.25 x 10^-3 L = 6.25 mL

Answer:

?

Explanation:

An exothermic reaction releases 13,450J of heat. How many calories of energy are released? A) 5 56,274 calories B)1,244 caloriesC) 134,500 caloriesD) 3,215 calories

Answers

Answer:

The correct option is;

D) 3,215 calories

Explanation:

Here we are to convert the units of energy

The given units is in Joules, J, while the required units is in calories, where the calorie is defined as the amount of heat required to raise the temperature of 1 gram of water by 1°C

The conversion formula therefore is 1 calorie = 4.1868 J

Hence, 1 J = 1/4.1868 calories

13,450 J = 13,450 × 1/4.1868 calories = 13,450 /4.1868 calories = 3212.477 calories

∴ 13,450 J ≈ 3,215 calories.

What is the molarity of an HCl solution if 125 mL is neutralized in a titration by 76.0 mL of 1.22 M KOH?

Answers

Answer:

0.74176 M HCl

Explanation:

1) Write out a balanced equation.

  KOH + HCl --> KCl + H2O

2) Calculate #mol KOH in 76.0mL needed for the titration.

 1.22 mol KOH in 1000mL

 x mol KOH in 76.0mL

 x = 0.09272 mol KOH

3) Use the balanced equation ratio (from step 1), 1 mol KOH : 1 mol HCl.

0.09272 mol KOH = 0.09272 mol HCl

4) 125mL of the HCl solution was used for the titration, so find the molarity.

0.09272 mol HCl is in 125mL

x mol HCl in 1000mL

x = 0.74176 mol HCL / 1 L

SO... 0.74176 M HCl is the answer.

*hope this helped*

- A Kind Stranger

The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and?

NaNO2

NaNO3

NaHNO

NaHNO3

Answers

Answer:

NaNO3

Explanation:

Hello,

In this case, the required reaction is an acid-base neutralization reaction which is said to be:

[tex]HNO_3+NaOH\rightarrow NaNO_3+H_2O[/tex]

There, we see that the sodium displaced the hydrogen in the nitric acid to form sodium nitrate a very used salt in the industry, so, as a result of that displacement, water is formed as the secondary neutralization product. For the above mentioned, answer is NaNO3 .

Best regards.

Answer: NaNO3

Explanation:

A salt sodium nitrate (NaNO3) is formed alongside water (H2O) when HNO3 and a solution of NaOH undergoes a neutralization reaction.

HNO3 + NaOH -------->  NaNO3   + H2O

The _____ of a weak acid is strong.

a. conjugate acid
b. conjugate base
c. acid
d. base

Answers

Answer: conjugate base

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

A weak acid has a strong conjugate base whereas a strong acid has a weak conjugate base. Similarly a weak base has a strong conjugate acid whereas a strong base has a weak conjugate acid.

[tex]CH_3COOH+NH_3\rightarrow CH_3COO^-+NH_4^+[/tex]

Acetic acid [tex]CH_3COOH[/tex] is weak acid which has strong conjugate base [tex]CH_3COO^-[/tex]

Why do the atoms in a molecule want to be so far apart? (Mention Electron domains/Electrons)

Answers

Answer:

Because like chargee repel, two molecules will resist being brought close together.

Explanation:

The shorter the distance is between them, the more energy it takes to push them to get even closer. If the molecules approach each other with sufficient energy, however, they may exchange atoms or even form a bond( chemical reaction)

The theoretical yield is the amount of product actually produced.

a. True
b. False

Answers

Answer:

a. True

Explanation:

Theoretical yield is the amount of product that could be obtained if a chemical reaction has 100% efficiency.

Hope it helps...

Falseee
It is actually The amount of product measured in grams that you would theoretically produce is every atom of the reactants reacted

Which of these defines a volcano?

A. An undersea rift that can cause the ocean floor to move
B. A mountain on Earth's crust through which molten material leaves the mantle
C. A large pile of rocks and other debris that turn into liquid when heated
D. An extremely tall collection of liquid metals that harden when cooled

Answers

the answer is b!!! !!!

Answer:

B

Explanation:

A boy jumps into a cold swimming pool and his body temperature goes down. His muscles, blood vessels, and nervous system work together to restore his body temperature. These responses allow the body to maintain--- Select one: stress balance work structure

Answers

Answer:

balance

Explanation:

PLEASE HELP I WILL GIVE BRAINLEST! what is life about?

Answers

Answer:

To live for God.

Explanation:

We are Gods creation. We are here to live for the Lord, to do love& to help save each other so when time comes we will be forever blessed.

Answer:

life is about life I think

What element is in group 17 and period 3 of the periodic table?

Answers

Answer:

Chlorine is the element located in period 3, group 17 of the periodic table.

Explanation:

Answer: Chlorine

Explanation:

2HNO (ag) +
LMg(s) →
Mg(NO3)2(s)
Helg)
155.0-ml of a solution of 0.75 M HNO3 is combined with 270 g of magnesium. What
volume of hydrogen gas will be produced at STP?

Answers

Answer:

The volume occupied by the gas is 1.302 × 10⁻³ m³

Explanation:

2HNO₃(aq) + Mg(s) → Mg(NO₃)₂ + H₂(g)

From the above reaction, we have that 2 moles of HNO₃ combine with 1 mole of Mg to produce 1 mole of Mg(NO₃)₂ and 1 mole of H₂

In the question, we have 155.0 mL of a solution of 0.75 M HNO₃ combining with 270 g of magnesium

Therefore, number of moles of HNO₃ = 0.75×155.0/1000 = 0.11625 moles

[tex]Number \, of \, moles \ of \ magnesium = \frac{Mass \ of \, magnesium}{Molar \, mass \ of \, magnesius} = \frac{270}{24.305} = 11.11 \ moles[/tex]

Therefore, HNO₃ is the limiting reaction, hence;

0.11625 moles of HNO₃ will react with 1/2×0.11625 moles or 0.058125 moles of Mg to produce 0.058125 moles of H₂

Hence since we now know the volume of H₂ produce, we can find the volume occupied at STP by the following universal gas equation relationship;

PV = nRT

Therefore;

[tex]V = \frac{n \times R \times T}{P}[/tex]

Where:

V = Volume of occupied by the gas = Required quantity

n = Number of moles = 0.058125 moles

R = Universal gas constant = 8.3145 J/(mol·K)

T = Temperature of the gas at STP = 273.15 K

P = Pressure of the gas at STP = 1 atm = 101325 Pa

[tex]V = \frac{0.058125 \times 8.3145 \times 273.15}{101325} = 1.302 \times 10^{-3} m^3[/tex]

Select the correct answer.
Which statement best describes the image?



A.
Ocean temperatures are relatively stable. During the day, the ocean cools the hotter air temperatures above land.
B.
Ocean temperatures are relatively stable. During the night, the ocean heats the cooler air temperatures above land.
C.
Ocean temperatures experience high fluctuations. During the day, the land cools the hotter air temperatures above the ocean.
D.
Ocean temperatures experience high fluctuations. During the night, the land heats the cooler air temperatures above the ocean.

Answers

Answer:

C.

Ocean temperatures experience high fluctuations. During the day, the land cools the hotter air temperatures above the ocean.

Explanation:

Generally ocean temperatures range from about -2o to 30o C (28-86o F). The warmest water tends to be surface water in low latitude regions, while the surface water at the poles is obviously much colder

C. Ocean temperatures experience high fluctuations. During the day, the land cools the hotter air temperatures above the ocean.

What is the hottest ocean temperature?

The hottest ocean area is in the Persian Gulf, where water temperatures at the surface exceed 90 degrees Fahrenheit in the summer. Another hot area exists in the Red Sea, where a temperature of 132.8 degrees Fahrenheit has been recorded at a depth of about 6,500 feet.

What is a good temperature to swim in the ocean?

A little cooler than your body temperature (98.6° Fahrenheit) should not be too cold so that you don't get chilled. 70° to 78° Fahrenheit is the range where most folks feel "comfortable" swimming.

To learn more about Ocean temperatures, refer

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What is a conductor
When electrons move easily though objects
When electrons cannot move easily through objects
When electrons are at rest

Answers

Hey there!

The answer would be A. When electrons. move easily through objects

In science, a conductor is a material that permits a flow of energy. A material that allows the flow of charged particles is an electrical conductor. A material that enables the transfer of thermal energy is a thermal conductor or heat conductor.

Hope this helps !

Need help with these three pls!!

Answers

Answer:

True True False

Explanation:

Valves are in most veins (to prevent backflow). Also valves in the chart and an in an combustion engine.

So the first statement is True.

Valves control the flow rate and direction of fluid within a closed system. So the second statement is True.

1 Pa = 1 N/m² So since 1 Pa equals to one newton per square metre the third statement is False.

A hydrate is ​typically a crystalline compound in which water molecules are chemically bound to another compound or an element. ​When CuSO​4​​⋅​ 5H​2​O is heated in a crucible, there is a loss of water. How should a student determine the amount of water lost?
a.Subtract the mass of the CuSO​4​ from the mass of CuSO​4​⋅ 5H​2​O
b.Subtract the mass of the CuSO​4​⋅ 5H​2​O from the mass of CuSO​4
c.Add the masses of CuSO​4​⋅ 5H​2​O and CuSO​4
d.Multiply the masses of CuSO​4​⋅ 5H​2​O and CuSO​

Answers

When CuSO​4​​⋅​ 5H​2​O is heated in a crucible, there is a loss of water. Subtract the mass of the CuSO​4​⋅ 5H​2​O from the mass of CuSO​4 to determine the amount of water lost. Therefore, option B is correct.

What do you mean by the compound ?

A substance made up of two or more components is called a compound. Table salt, water, and carbon dioxide are a few examples of compounds.

Chemical substances have no electrical charge. In most cases, ionic compounds are created when a metal interacts with a nonmetal. The reaction between two nonmetals produces covalent compounds.

Elements are unadulterated substances made up of only one kind of atom. Compounds are substances that are created when two or more different types of elements are chemically combined in predetermined ratios.

To determine the amount of water lost subtract the mass of the CuSO​4​⋅ 5H​2​O from the mass of CuSO​4.

Thus, option B is correct.

To learn more about the compound, follow the link;

https://brainly.com/question/13516179

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if the volume and Kelvin temperature are reduced by one-half what will happen to the pressure???

Answers

Answer:

the pressure will decrease

Explanation:

Ideal gas law is valid only for ideal gas not for vanderwaal gas. The pressure will remain same as the initial pressure on decreasing volume and temperature by half.

What is ideal gas equation?

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. real gas can become ideal gas at low pressure and high temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of  gas

V= volume of  gas =1/2V

n =number of moles of  gas

T =temperature of  gas =T/2

R = Gas constant = 0.0821 L.atm/K.mol

Substituting all the given values we get

P×(V/2)=nR(T/2)

(PV)/2=(nRT)/2

PV=nRT

Therefore, the pressure will remain same as the initial pressure  on decreasing volume and temperature by half.

To learn more about ideal gas equation, here:

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HELPPP TODAY IS THE LAST DAY OF SCHOOL

Answers

Answer:

orbiting closer to the earth's surface.....im pretty sure abt it

How many moles of O2 can be produced from 1.7 moles of KClO3?


Answers

Answer:

2.55 moles

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

How did Robert Goddard contribute to space exploration?
He was the first person in space.
He was the first person to walk on the moon.
He was the first person to use liquid fuel for rockets.
He designed and built the first space station.

Answers

Answer:

He was the first person to use liquid fuel for rockets.

The pressure of a gas is 1.35 atm at temperature of 21oC. If the volume and amount of gas is unchanged, what pressure would be needed for the temperature to raise to 36oC?

Answers

Answer:

2.31 atm

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!



Using the diagram of the forces on an airplane, which arrow represents the force of gravity?
A) A
B) B
C) C
D) D

Answers

Answer:

Is there a diagram that you can post

Answer:

D

Explanation:

Usatestprep :)

How could you test each molecule to
determine if it was DNA or RNA?

Answers

Answer:

Nucleobases should be checked. RNA contains adenine, guanine, cytosine and uracil instead of thymine, so if we isolate uracil, it means that it is RNA, if not, then is DNA.

What is the oxidation state of Fe(s)

Answers

The  oxidation state is zero for Fe (s)

This group of fungi has reproductive cells with flagella so that they can swim

Answers

Answer:

The answer would be chytrids.

Chytridiomycota (chytrids) is a group of fungi that has reproductive cells with flagella so that they can swim.

What is Chytridiomycota?

The fungus known as the amphibian chytrid fungus only infects frogs. A frog uses its skin to maintain homeostasis. The chytrid fungus ruins the frog's ability to swallow, exchange ions, and function normally when it affects its skin.

The fungus targets the keratin-containing areas of a frog's skin. Frogs have trouble breathing because they use their skin for respiration.

As a class of fungi, chytrids are regarded as the most basic. They are primarily aquatic, and the only fungus cells known to contain flagella are those of the gametes. They can reproduce asexually or sexually; the latter method produces zoospores.

Therefore, a class of fungi known as chytrids possesses reproductive cells with flagella that allow them to swim.

To learn more about Chytridiomycota, refer to the link:

https://brainly.com/question/4086352

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If a gas occupies 22.4 L at 0.265 atm, then what will the pressure be in atmospheres if the gas occupies 35.52 L? Assume all other
variables are held constant
A)0.167 atm
B)0.437 atm
C)0.886 atm
D)149 atm

Answers

Answer:

The new pressure is 0.167 atm

The correct answer is option A

Explanation:

Step 1: Data given

Volume of the gas = 22.4 L

Pressure of the gas = 0.265 atm

The volume increases to 35.52 L

Step 2: Calculate the new pressure

P1*V1 = P2*V2

⇒with P1 = the initial pressure = 0.265 atm

⇒with V1 = the initial volume = 22.4 L

⇒with P2 = the new pressure = TO BE DETERMINED

⇒with V2 = the increased volume = 35.52 L

0.265 atm * 22.4 L = P2 * 35.52 L

P2 = (0.265 atm * 22.4 L) / 35.52 L

P2 = 0.167 atm

The new pressure is 0.167 atm

The correct answer is option A

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