Difference between distillation and chromatography

Answer:

0.3 hours of oxygen use will be obtained from the 4.7 L tank.

Explanation:

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three.

To solve a direct rule of three, where a, b and c are known data and x is the value to be calculated  the following formula must be followed:

a ⇒ b

c ⇒ x

So \(x=\frac{c*b}{a}\)

A value of 15 L/hour indicates that 15 L is consumed in 1 hour. The following rule of three can then be applied: if the average basal rate of oxygen consumption for an adult is 15 L in 1 hour, then 4.7 L in how long will it be consumed?

\(time=\frac{4.7 L*1 hour}{15 L}\)

time= 0.3 hours

0.3 hours of oxygen use will be obtained from the 4.7 L tank.

The highest electric force exerted by charges -4 ×10⁻⁵ C and 3 ×10⁻⁵ C  placed 0.5 m apart is equal to 43.15 N.

The lowest electric force exerted by charges 3 ×10⁻⁵ C and 3 ×10⁻⁵ C  placed 1 m apart is equal to 8.10 N.

According to Coulomb’s law, the force of attraction between two charges is equal to the product of their charges and is inversely proportional to the square of the distance. This electric force applies along the line joining the two charges.

The magnitude of the electric force can be written as follows:

\(\displaystyle F = k\frac{q_1q_2}{r^2}\)

where k is constant proportionality = 8.99 × 10⁹ N.m²/C².

Given the charge on one point charge, q₁ =  4 ×10⁻⁵ C

The charge on the other point charge, q₂ = - 3 × 10⁻⁵C

The distance between these two charges, r = 0.5 m

The magnitude of electric force between the charges  will be:

\(\displaystyle F = 8.99\times 10^{9}\times \frac{4\times 10^{-5}\times 3\times 10^{-5}}{(0.5)^2}\)

F = 43.15 N

Given the charge on one point charge, q₁ =  3 ×10⁻⁵ C

The charge on the other point charge, q₂ = 3 × 10⁻⁵C

The distance between these two charges, r = 1 m

The magnitude of force between the charges will be:

\(\displaystyle F = 8.99\times 10^{9}\times \frac{3\times 10^{-5}\times 3\times 10^{-5}}{(1)^2}\)

F = 8.1 N

Learn more about Coulomb's law, here:

brainly.com/question/506926

#SPJ1

22.49 grams of aluminum will react fully with 1.25 moles of \(Cl_{2}\).

What is Moles?

Moles is a unit of measurement used in chemistry to express the amount of a substance. One mole of a substance is defined as the amount of that substance that contains the same number of particles (atoms, molecules, or ions) as there are atoms in 12 grams of carbon-12.

To determine the mass of aluminum that will react fully with 1.25 moles of \(Cl_{2}\), we need to use the stoichiometry of the balanced chemical equation.

From the balanced chemical equation:

2 Al + 3 \(Cl_{2}\) → 2 Al\(Cl_{3}\)

we can see that 2 moles of Al react with 3 moles of \(Cl_{2}\) to produce 2 moles of Al\(Cl_{3}\). Therefore, the mole ratio of Al to \(Cl_{2}\) is 2:3.

To calculate the amount of Al required to react with 1.25 moles of \(Cl_{2}\), we can set up the following proportion:

2 moles Al / 3 moles \(Cl_{2}\) = x moles Al / 1.25 moles \(Cl_{2}\)

where x is the number of moles of Al required.

Solving for x, we get:

x = (2/3) * 1.25 = 0.8333 moles Al

Finally, we can use the molar mass of aluminum to convert moles to grams:

mass of Al = number of moles of Al * molar mass of Al

mass of Al = 0.8333 mol * 26.98 g/mol

mass of Al = 22.49 g

Therefore, 22.49 grams of aluminum will react fully with 1.25 moles of C\(Cl_{2}\).

Learn more about Moles

https://brainly.com/question/29367909

#SPJ1

Answer:

0.4941, 0.5059

Explanation:

\(P_N\) = Partial pressure of nitrogen = 417 mm Hg

\(P_{Xe}\) = Partial pressure of xenon = 427 mm Hg

Total pressure in the system is given by

\(P=P_N+P_{Xe}\\\Rightarrow P=417+427=844\ \text{mm Hg}\)

Mole fraction is given by

\(X_N=\dfrac{P_N}{P}\\\Rightarrow X_N=\dfrac{417}{844}\\\Rightarrow X_{N}=0.4941\)

For xenon

\(X_{Xe}=1-0.4941=0.5059\)

or

\(X_{Xe}=\dfrac{P_{Xe}}{P}\\\Rightarrow X_{Xe}=\dfrac{427}{844}\\\Rightarrow X_{Xe}=0.5059\)

So, mole fraction of nitrogen is 0.4941 and xenon is 0.5059.

The concentration of HBr used in the titration is found to be 0.0978M.

Volume of NaOH used is 27.50ml and it’s molarity used is 0.200M.

Volume of HBr used is 56.20ml.

On comparing molarity of both the solutions, we get the relation

HBr × VHbr  = MNaOH × VNaOH

MHBr = 0.200M × 27.50ml /56.20ml

MHBr = 0.0978M.

A colorless, stifling gas called hydrogen bromide is highly dissociated in water and exceedingly soluble in water. In the presence of damp air, it rapidly fumes. Hydrogen bromide gas is a very caustic chemical that, when contacted, can result in serious burns.

To determine the concentration of an identified analyte, titration is a typical laboratory technique for quantitative chemical analysis. A standard solution with a defined concentration and volume is prepared as a reagent, also known as the titrant.

To learn more about titration, refer this link.

https://brainly.com/question/15170788

#SPJ9

The following are three weather variables and the tools that can be used to observe and gather data on them to ascertain how air mass movements and weather changes are related:

Scientists can discover patterns and connections between changes in weather and changes in air mass movement by observing and recording data on these meteorological variables.

learn more about weather conditions here

https://brainly.com/question/1034593

#SPJ1

Answer:

Liquid A.

Explanation:

Specific heat is defined as the amount of heat required per unit of mass to raise the temperature by one degree celsius.

When two liquids are heated, the liquid with larger specific heat is the one which is hotter. That is because is required more energy to decrease its temperature by 1°C.

Thus, in the problem, liquid A has the larger specific heat

Answer:

50% ISOPROPANOL / H2O - 1

25% ISOPROPANOL / H2O - 2

Pure water - 4

ISOPROPANOL / H2O - 3

Explanation:

More Isopropanol concentration is least polar. When the isopropanol is mixed with water its polarity increases. Pure water is most polar. The polarity of a substance is dependent on its ability to bent and mold in the shape as required.

Answer:

Lead to Sulfur = 2 : 1

Explanation:

Given

Represent lead with L and Sulfur with S

L1 = 6.46g for S1 = 1 g

L2= 3.23g for S2 = 1 g

Required

Determine the simple whole number ratio of L to S

Divide L1 by L2

L = L1/L2

L = 6.46g/3.23g

L = 2

Divide S1 by S2

S = 1g/1g

S = 1

Represent L and S as a ratio:

L : S = 2 : 1

Hence, the required ratio of Lead to Sulfur is 2 to 1

Iodine is nonpolar, and thus the water does not dissolve the iodine because water is polar.

Polar molecules occur when there is an electronegativity difference between the bonded atoms.

Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.

Hence , Iodine is nonpolar, and thus the water does not dissolve the iodine because water is polar.

Learn more about polarity here ;

https://brainly.com/question/3184550

#SPJ1

Considering the definition of molar mass, the correct answer is option c): the mass of 1.85 moles H₂O₂ is 62.9 grams.

The molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.

The molar mass of a compound is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

In this case, you know the molar mass of the elements is:

So, the molar mass of the compound H₂O₂ is calculated as:

H₂O₂= 2× 1 g/mole + 2× 16 g/mole

Solving:

H₂O₂= 34 g/mole

You can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 34 grams, 1.85 moles of the compound contains how much mass?

mass= (1.85 moles× 34 grams)÷ 1 mole

mass= 62.9 grams

Finally, the mass of 1.85 moles H₂O₂ is 62.9 grams.

Learn more about molar mass:

brainly.com/question/5216907

#SPJ1

The amount of \(KNO_3\) dissolved would be 1011 grams.

The mole fraction of a component of a substance is the ratio of the mole of the component relative to the mole of the whole substance.

Thus, for a mole fraction of KNO to be 0.1, it means 1 mole of KNO relative to 10 moles of KNO3.

In other words, the number of moles of \(KNO_3\) dissolved is 10 moles.

Recall that: mole = mass/molar mass, and mass = mole x molar mass

Molar mass of \(KNO_3\) = 39.1 + 14 + (16 x 3) = 101.1 g/mol

Mass of 10 moles of \(KNO_3\) = 10 x 101.1

                                             = 1011 grams

In other words, the amount of \(KNO_3\) dissolved is 1011 grams.

More on mole fractions can be found here: https://brainly.com/question/29808190

#SPJ1

All strong acids are strong electrolytes and ionize completely when dissolved in water.

An electrolyte is a medium that contains ions that are electrically conducting due to the movement of ions but they do not conduct electrons. They are known to partially or fully dissociate in ions solution.

Strong acids are known to dissociate completely into their ions and thus are referred to as strong electrolytes.

These acids also ionize completely when dissolved in water due to their polarity. For instance, HCl (hydrochloric acid) is a strong electrolyte, a strong acid, and can ionize completely when dissolved in water.

Based on the above explanations we can conclude that "all strong acids are strong electrolytes and ionize completely when dissolved in water"

Answer:

gain

Explanation:

The volume of nonadecane that has a density of 0.7860 g/mL is 1573.2mL.

The volume of a substance can be calculated by dividing the mass of the substance by its density. That is;

Volume = mass ÷ density

According to this question, nonadecane has a density of 0.7860 g/mL and has 4.605 moles.

First we calculate the mass of nonadecane as follows:

mass = 4.605 mol × 268.518 g/mol

mass = 1236.53g

Volume = 1236.53g ÷ 0.7860 g/mL = 1573.2mL

Therefore, the volume of nonadecane that has a density of 0.7860 g/mL is 1573.2mL.

Learn more about mass at: https://brainly.com/question/14651380

#SPJ1

Answer:

a. Gas pressure: decreases

b. Gas moles: remain constant

c. Average speed of gas molecules: decreases

d. Average distance between molecules: large

Explanation:

The kinetic molecular theory of gases explains the behavior and properties of gases.

In this case, the gas is cooled, so its temperature decreases.

a. Gas pressure:

To analyze the gas pressure we can use the Ideal Gas formula P.V=n.R.T, where pressure and temperature are directly proportional, that is, if the temperature decreases, the gas pressure will also decrease.

b. Gas moles:

The moles of gas remain constant, since the flask is sealed, so gases cannot enter or leave the flask.

c. Average speed of gas molecules:

Temperature is related to the average speed of movement of molecules, so as temperature decreases, the average speed of molecules also decreases.

d. Average distance between molecules:

As the average speed of molecules decreases, they stay in place, hardly moving, so the average distance between molecules is greater than if the molecules were moving faster.

The molecular formula of the compound containing 81.82% carbon

and 18.18% hydrogen by mass is C₃H₈

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

Carbon (C) = 81.82%

Hydrogen (H) = 18.18%

Molar mass of compound = 44 g/mol

We'll begin by calculating the empirical formula of the compound. This can be obtained as follow:

Carbon (C) = 81.82%

Hydrogen (H) = 18.18%

Divide by their molar mass

C = 81.82 / 12 = 6.818

H = 18.18 / 1 = 18.18

Divide by the smallest

C = 6.818 / 6.818 = 1

H = 18.18 / 6.818 = 2.67

Multiply by 3 to express in whole number

C = 1 × 3 = 3

H = 2.67 × 3 = 8

Thus, the empirical formula of the compound is C₃H₈

Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:

Molecular formula = Empirical formula × n = molar mass

[C₃H₈]n = 44

[(12×3) + (1×4)]n = 44

[36 + 4]n = 44

40n = 44

Divide both side by 40

n = 44/40

n ≈ 1

Molecular formula = C₃H₈ × n

Molecular formula = C₃H₈ × 1

Therefore, the molecular formula of the compound is C₃H₈

Learn more: https://brainly.com/question/13208888

Answer:

C3H8(g) + 5O2(g) = 3CO2(g) + 4H2O(g)

Explanation:

Cathode: 2 Ag+ (aq) + 2 e- → 2 Ag (s). Anode: 2 H+ (aq) → H2 (g) + 2 e-.

What is cathode ?

A cathode is an electrode in an electrical circuit from which electrons flow out. It is usually made of metal and is negatively charged. Cathodes are commonly used in electronic devices such as batteries, lamps, and vacuum tubes. In a battery,

the cathode is the terminal which provides a negative charge and is usually connected to the negative terminal of the battery. In a vacuum tube, the cathode is the source of electrons which flow through the tube to the anode, which is the positive terminal.

To learn about more cathode .

https://brainly.com/question/4052514

#SPJ1

The answer is 39.2%.

Solution:

\(Yield = \frac{Observed yield}{Theoritcal yield}*100\)

= \(\frac{4.0}{10.2} *100\)

= 39.2%.

Theoretical yields are calculated based on the stoichiometry of the chemical formula. Actual yield is determined experimentally. Percent yield is determined by calculating the ratio of actual yield to theoretical yield. how much usable product is obtained after processing; how much crude product is actually ordered.

However, in practice, the actual product yield is almost always lower than the theoretical yield. The actual yield is the amount of product actually obtained and the theoretical yield is the maximum possible yield. There are several reasons why percentage returns may not be 100%. This is because some other unexpected reaction occurred that did not produce the desired product.

Learn more about Theoretical yields here:- https://brainly.com/question/25996347

#SPJ4

The gas must be transported in upright position and the engineer must avoid excessively shaking the cylinder.

We know that a gas must be transported under pressure. This implies that the gas is subjected to a very high magnitude of pressure so that the gas is liquefied. The liquefied gas is at very high pressure and we would need to make use of a pressure device in order to be able to effectively transport the gas. We must not forget that the transport of a gas under pressure is a very risky affair. As the gas is being transported, care must be taken to ensure that excessive pressure is not put on the cylinders as this could lead to an explosion and potential fires if the gas is inflammable.

Nitrogen must be transported under pressure. Sometimes, we can not lay hands on the required pressure vessels for transporting compressed gas. In that case, the gas must be transported in upright position and the engineer must avoid excessively shaking the cylinder.

Learn more about nitrogen gas under pressure:https://brainly.com/question/9294525

#SPJ1

Answer:

Filter it

Explanation:

B. The bonds between a hydrogen atom and another atom in a molecule

Answer: C

Explanation: I got it correct !

A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

Thus, Many waterfalls are transient and only occur during rainstorms because of their location in the landscape, where they are often over bedrock and fed by a small contributing region.

 For general knowledge, we are listing the "Top 10 Highest Waterfalls in India" here. The Kunchikal Falls are the second-highest waterfall in Asia and the highest in all of India.

The waterfall, which is close to Agumbe in Karnataka's Shimoga district, has a height of 1,493 feet. The Varahi River creates the biggest waterfall. The sole permanent rain forest research is located in Agumbe Valley, one of India's most heavily rained-on regions.

Thus, A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

Learn more about Waterfall, refer to the link:

https://brainly.com/question/30309599

#SPJ1

Answer:

Loam soil* is soil composed of equal parts sand, silt, and clay.

Explanation:

The mechanism of  the reaction of an alkene with an electrophile attached below

There's 2 steps in reaction between alkene and electrophile

The K in the KI electrophile is attacked by the two pi electrons from the double bond during the first step of the process, which is denoted by a curved arrow. The hydrogen from HBr and a carbon from the double bond combine to produce a C-H sigma bond thanks to the two pi electrons. In order to create a halide anion, the electrons from the H-X bond simultaneously transfer to the halogen. One of the carbons becomes an intermediate carbocation with an electron deficit when pi electrons from the double bond are removed. The positive charge is housed in an unhybridized p orbital on this sp2 hybridized carbon atom.

In order to receive an electron pair from the nucleophilic halide anion, the generated carbocation can now function as an electrophile. The neutral alkyl halide is the end result of electrophilic addition, and the electron pair transforms into an X-C sigma bond.

The HBr, HCl, HI, and HF halides can all take part in this reaction and add on in the same way. Although various halides do react at varying rates, this is because the H-X bond weakens with increasing X due to inadequate orbital overlap.

Your question is incomplete but most probably your full question attached below

Learn more about electrophile attack at https://brainly.com/question/14704243

#SPJ4

Answer:

b.  1.9 × 10-3

Explanation:

Answer:1.9x10-3

Explanation:

average