. Strong acid-titrated with strong base. Suppose the titration was reversed in question 2. You titrate 20.0 mL of 0.15 M HCl with 0.15 M NaOH. A. Add this curve to your sketch in question 2 part A. B. Then, determine the pH (a) at the start of the titration and (b) at the equivalence point. (c) What is the total volume of solution at the equivalence point

Answer:

1.44 g

Explanation:

The problem gives you the molarity and volume of the target solution, so right from the start you know that you can use that information to determine the number of moles of hydrochloric acid that it must contain.

So, molarity measures a solution's concentration in terms of how many moles of solute, which in your case is hydrochloric acid, you get per liter of solution.

A

0.158 M

hydrochloric acid solution contains

0.158

moles of hydrochloric acid for very liter of solution. Since you're dealing with

250 mL

, the equivalent of

1

4

th

of a liter, your solution will contain

250

mL

⋅

1

L

10

3

mL

⋅

0.158 moles HCl

1

L

=

0.0395 moles HCl

Now that you know how many moles of hydrochloric acid are needed to prepare your solution, use the compound's molar mass to convert this to grams

0.0395

moles HCl

⋅

36.46 g

1

mole HCl

=

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

1.44 g

a

a

∣

∣

−−−−−−−−−−

Explanation:

Please  brainliest.

Answer:

D 1.45 M

Explanation:

Answer:

119.98 mL

Explanation:

Initial volume V1 = 123 ml

Initial temperature = T1 = 21◦C + 273 = 294 K

Initial pressure P1 = 760 Torr - 18.65 Torr = 741.35 Torr

Final volume V2= ???

Final temperature = T2= 21◦C + 273 = 294 K

Final pressure P2 = 760 Torr

From;

P1V1/T1= P2V2/T2

P1V1T2 = P2V2T1

V2 = P1V1T2/P2T1

V2= 741.35 * 123 * 294/760 * 294

V2 = 119.98 mL

Answer:

pH of a 0.00100 molar solution of HBr = 3

Explanation:

You get the -log of the molarity to get the pH or the pOH, depending on whether the substance is an acid or a base.

If the substance is an acid, getting the -log of its molarity would get you the pH.

If the substance is a base, getting the -log of its molarity would get you the pOH.

Since HBr is an acid, you will get the pH of it by getting the -log of its molarity, which in this case is 0.001

-log(0.001) = 3

(btw, when the pH and the pOH are added together, you get 14, so the pOH of this solution of HBr is 14 - 3, which is 11)

The pH value of the molar solution is mathematically given as

pH= 3

Question Parameters:

the pH of a 0.00100

Generally, the equation for the pH  value is mathematically given as

pH = - log([H+])

Where

[H+] = [HBr]

[H+] = 0.001 M

Hence

pH = - log([H+])

pH = - log(0.001)

pH= 3

Read more about pH value

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Answer:

Its Body Temperature, Blood glucose, and Blood pH

Explanation:

I checked in Body systems and Homeostasis in Florida.org :>

Answer:

nuclear energy

Explanation:

Answer:

This is false: Meiosis is what happens when body cells divide to form identical body cells.

Explanation:

Meiosis is what happens when body cells divide to form identical body cells

Answer:

The correct answer is "[tex]1.21\times 10^5 \ Pa[/tex]".

Explanation:

The given values are:

Number of moles,

n = 2.5 moles

Volume,

V = 45 liters

Temperature,

T = 261 K

As we know,

⇒  [tex]PV=nRT[/tex]

or,

⇒  [tex]P=\frac{nRT}{V}[/tex]

On substituting the values, we get

⇒      [tex]=\frac{2.5\times 0.0821\times 261}{45}[/tex]

⇒      [tex]=\frac{53.57}{45}[/tex]

⇒      [tex]=1.19 \ atm[/tex]

On converting it in Pa, we get

⇒      [tex]=1.19\times 1.01325\times 10^5[/tex]

⇒      [tex]=1.21\times 10^5 \ Pa[/tex]

Answer:

c

Explanation:

Answer:

54.4g

Explanation:

Let's first take account of what we have and what we're looking for.

Q = heat energy (Joules, J)= 490 J

m = mass of a substance= ??

c = specific heat (units J/kg∙K)= 0.50 J/g°C

∆T = change in temperature (Kelvins, K)= Final temperature - initial temperature -> (0C - (-18C))

We can use Q = mc∆T to determine the mass, we'll rearrange the formula to solve for mass, so it'll be: m=Q/c∆T. Let's plug it all in.

m= 490J / (0.50 J/g°C x ((0C - (-18C)))

m= 490J / (0.50 J/g°C x (0 + 18))

m=  490J / (0.50 J/g°C x 18)

m= 490J / 9 J/g

m= 54.4g of glass

Answer:

Endothermic

Explanation:

An endothermic reaction is one in which energy is absorbed while an exothermic reaction is one in which energy is given out(evolved).

If we look at the reaction as written; 3C(graphite) + 3H2(g) + 88kcal -------> C3H8(g), we will notice that;

i) 88kcal of energy had to be absorbed for the reaction to occur

ii) The enthalpy change for the reaction is positive.

Since energy must be taken in to drive the forward reaction, then the reaction is endothermic as written.

Answer:

the answer for this question is true

Explanation:

crude oil takes thousands of years before forming.

it takes place when animals and plants die...later they decompose especially the ones in water ..the ones on land burn as fossil fuels and go back to the atmosphere through combustion..the decomposed materials turn into crude oil in the ocean where it's extracted and separated through fractional distillation into several oils such diesel, petroleum, coalter e.t.c

Answer: The correct answer is D

Explanation:

Answer:

Fast, Direction, Time

Explanation:

Answer:

41.45 mL

Explanation:

Applying the general gas equation,

PV/T = P'V'/T'............... Equation 1

Where P = Initial pressure of hydrogen, V = Initial volume of hydrogen, T= Initial Temperature of hydrogen, P' = Final pressure of hydrogen, V' = Final Volume of Hydrogen, T' = Final Temperature.

make V' the subject of the equation

V' = PVT'/TP'................ Equation 2

Given: P = 718 torr = (718×133.322) N/m² = 95725.196 N/m², V = 47.9 mL = 0.0479 dm³, T = 26 °C = (26+273) = 299 K, T' = 273 K, P' = 101000 N/m²

Substitute these values into equation 2

V' = ( 95725.196×0.0479×273)/(299×101000)

V' = 0.04145 dm³

V' = 41.45 mL

If a person will have damaged nucleic acid, they can not form certain proteins. The correct option is D.

Protein is a polypeptide-based molecule. Polypeptides are a sort of biological particle made up of amino acids that form chains.

Nucleic acid is a kind of macromolecule composed of a lengthy polynucleotide chain that encompasses deoxyribonucleic acid and ribonucleic acid.

Proteins are built under an elaborate process orchestrated by the nucleic acids deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) (RNA).

Protein biosynthesis is the process of constructing protein chains from individual amino acids in a specific sequence.

Deoxyribonucleic acid stores the information that cells necessitate to produce proteins.

A related type of nucleic acid widely recognized as ribonucleic acid (RNA) exists in various molecular forms and serves a variety of cellular functions, including protein synthesis.

Thus, the correct option is D.

For more details regarding nucleic acids, visit:

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#SPJ2

Answer:

hi

Explanation:

John will travel to Russia next week

hope it helps

have a nice day

Answer:

Your answer will be..

John will travel to Russia next week.

Explanation:

He will travel NEXT week so we need to say that he will travel next week.

This may help:

Past tense:  We use -ed because that shows the we already did or finished it. EX: We traveled to Russia over the Spring break

Current Tense:  You will use -ing to show that you are traveling in the current time. EX:We are traveling to Russia.

Future tense:  You might use -ing or keep it the root word. EX: We will be traveling to Russia next week.

We will travel next week.

Hope it helped! Please mark me brainliest! I love helping and I spend a lot of time explaing the answers. Thanks!

~King Sulay~

Answer:

Low pressure and high temperature

Explanation:

Explanation:

When the student crushes sugar there there occurs an increase in the number of molecules or particles of sugar. This means that now more number of sugar particles (solute) are able to interact with water (solvent).

Therefore, there will be more number of collisions taking place between the solute and solvent molecules.

As a result, sugar will dissolve readily into water as there is an increase in interaction between solute and solvent particles.

Thus, we can conclude that when he crushes the sugar and then stirs it into the water then it will work as this leads to more interaction or collisions between the solute and solvent particles.

Answer:

B. Carry oxygen, nutrients, waste, & to fight pathogens

Explanation:

The circulatory system refers to all organs and tissues involved in carrying blood and lymph around the body.

The circulatory system carries oxygenated blood from the heart to cells and  deoxygenated blood back to the heart.

Nutrients are carried in the blood to cells in different parts of the body and waste products are also carried from cells in the blood.

White blood cells is a component of blood in the circulatory system that fights off diseases.

Answer:

-217 kJ

Explanation:

ΔH =  reactant energy - product energy

ΔH = [(C-H) × 2 + (C≡C)] + [2 × H-I] - [(I-C) × 2 + (C-H) × 4 + (C-C)]

ΔH = [ (413 × 2 ) + 839 + 2(299)]  - [(240 × 2) + (413 × 4) + 348]

ΔH = [826 +839 + 598] -  [ 480 +1652 + 348]

∴ ΔH = -217

Answer:

1

Explanation:

Answer:

Answer:

[tex]\boxed {\boxed {\sf 104 \%}}[/tex]

Explanation:

Percent ratio is the ratio of the actual yield to the theoretical yield. The formula is below.

[tex]Percent \ Yield} = \frac{{Actual \ Yield}}{{Theoretical \ Yield}} \times 100 \%[/tex]

The reaction of sodium and chlorine should theoretically yield 12.5 grams, but the actual yield was 13.0 grams.

Substitute these values into the formula.

[tex]Percent \ Yield} = \frac{{13.0 \ g }}{{12.5 \ g}} \times 100 \%[/tex]

Divide.

[tex]Percent \ Yield} = 1.04 \times 100 \%[/tex]

Multiply.

[tex]Percent \ Yield= 104 \%[/tex]

For this reaction, the percent yield is 104%

Answer:

Ingredients

2 ⅓ cups all-purpose flour.

1 tablespoon baking powder.

¾ teaspoon salt.

1 ½ cups white sugar.

½ cup shortening.

2 eggs.

1 cup milk.

1 teaspoon vanilla extract.

Explanation:

Answer:

1024.24 K

Explanation:

From the question,

Applying the general gas eqaution

PV/T = P'V'/T'.................... Equation 1

Where P, V, and T = Initial pressure, initial volume and initial Temperature of the gas respectively,  P', V' and T' = Final pressure, Final Volume and Final temperature of the gas respectively

make T' the subject of the equation

T' = P'V'T/(PV).................... Equation 2

Given: P = 1220 mmHg, V = 85 mL, P' = 836 mmHg, V' = 350 mL, T = 363 K

Substitute these value into equation 2

T' = (836×350×363)/(1220×85)

T' = 1024.24 K

Answer:

laboratory preparation off Hydrogen: Hydrogen is prepared in the laboratory by the action of the dilute hydrochloric acid or dilute sulphuric acid on granulated zinc. Use of Granulated Zinc Granulated zinc contains an impurity like copper which acts as a positive catalyyst.

Explanation:

Hope this helps!