Fractional distillation is used to separated

A, an insoluble substance from a soluble volatile substance

B. substances which are adsorbed differently, and which differ in their solubility in a solvent

c. liquids with differing boiling points

D gas, liquid or solid impurities from a mixture​

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:

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

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.

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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:

You should be posting this question under the biology tab, but here's the answer nonetheless.

a. 25% (if the woman is Ce)

c. 0% (if the woman isn't Ce)

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:

2.114 atm

Explanation:

Since it is just pressure and volume, use Boyle's Law

P1V1 = P2V2

Then plug in numbers

(1 atm)(1 L) = P2(.473 L)

P2 = 2.114 atm

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:

the answer for this question is true

2.85 grams

4.28x10^2 atoms (40.08 grams of Ca/ 6.02x10^23)

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!

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:

607.9616 grams

Explanation:

Hope this helped!!

Answer:

5.83 M

Explanation:

3.5 M * 125.0 ml  =  M₂ * 75.0ml

437.5 M.ml = M₂ * 75.0 ml

M₂ = 437.5 M.ml / 75.0 ml

M₂ = 5.83 M

Answer:

Amphoteric oxide is an oxide that reacts with both acids and bases. In other words, it possesses both acidic and basic properties. For example both zinc and aluminium are metals but their oxides, ZnO and Al2O3 are amphoteric oxides as they react with both acids and bases.

Explanation:

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:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we're finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

We have

[tex]P_2 = \frac{0.5 \times 150}{75} = \frac{75}{75} = 1 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

B

Explanation:

Figure 1 - Charles Richter studying a seismogram. There are a number of ways to measure the magnitude of an earthquake. The first widely-used method, the Richter scale, was developed by Charles F. Richter in 1934.

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:

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:

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:

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:

inversely proportional

Explanation:

Answer:

(9.03x10^-14)x(8.455x10^20)=7.634865x10^7

(5.2x10^11)/(2.10x10^-4)=2.476190x10^15

(7.67x10^12)x(3.8x10^15)=29146000000000000000000000000

(9.237x10^20)/(4.5x10^-6)=2.0526x10^26

Explanation:

Answer:

Its Body Temperature, Blood glucose, and Blood pH

Explanation:

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

Answer:

D 1.45 M

Explanation: