A student was performing paper chromatography and let the separation continue overnight. The
A student was performing paper chromatography and let the separation continue overnight. The student wished to determine if the mixture contained a substance with an RF factor of 0.343 where:

Rf = (distance travelled by the component)/(distance travelled by the solvent)

a) What data would be affected by this error?

b) Explain the effect on the calculated Rr.

Answers

Answer 1

Based in the information given, the data that'll be affected by the error is the value of the solvent data.

It should be noted that the data that'll be affected based on the scenario given is the value of the solvent. When the preparation is kept overnight, there'll be an overflow of the solvent.

In such a case, it'll be difficult to get the correct distance that the solvent travelled. The effect on the calculated Rr is that the calculated Rr will be incorrect due to the error in solvent value.

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Related Questions

Se dispone de un recipiente de 60 litros que contiene un gas de 1,64 atm y a una temperatura de 100K ¿Cuántos moles de gas hay? *

Answers

En este caso, dado que se describe un gas del que se conoce el volumen (60L), la presión (1.64 atm) y la temperatura (100K), es posible usar la ecuación del gas ideal para calcular los moles que hay presentes a estas condiciones:

[tex]PV=nRT[/tex]

Ahora, despejamos las moles del gas como sigue:

[tex]n=\frac{PV}{RT}[/tex]

Finalmente, reemplazamos los valores dados, teniendo en cuenta que R es 0.08206 en atmosferas, litros y Kelvin:

[tex]n=\frac{1.64atm*60L}{0.08206*100K}\\\\n=11.8mol[/tex]

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what is air pressure? In your own words

Answers

Answer:

The amount of force applied on an object that is moving in motion

Explanation:

I WILL GIVE BRAINLIST!!!!!!!!!! HELPPPPPP (Learning Newtons Law) A 0.5 kg tennis ball, a 2 kg basketball, and a 5 kg bowling ball are all falling at the same speed.


Which has more momentum?


A: the 0.5 kg tennis ball



B: the 2 kg basketball



C: the 5 kg bowling ball



D: the all have the same momentum
Hurry!!! Only got a couple mins!!!

Answers

The momentum of the bowling ball will be greater than the rest balls.

The correct answer to the question is Option C. The 5 kg bowling ball

Momentum is defined as the product of mass and velocity i.e

Momentum = mass × velocity

If we keep the velocity of the object constant, the momentum will depend on the mass of the object.

Thus, the higher the mass, the greater the momentum and the lesser the mass, the smaller the momentum.

From the question given above,

Mass of tennis = 0.5 Kg

Mass of basketball = 2 Kg

Mass of bowling ball = 5 kg

We can see that the bowling ball has a higher mass.

Therefore, the momentum of the bowling ball will be greater than the rest balls.

The correct answer to the question is Option C. The 5 kg bowling ball

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A sample of a gas in a 4L container at 300K has a pressure of 1 atm. If the
temperature is increased to 600K and the volume is decreased to 2L , the
pressure is likely to be closest to which of the following? *
O 0.5 atm
1 atm
4 atm
2 atm

Answers

The final pressure of the gas in the container is 4 atm

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

Initial volume (V₁) = 4 L

Initial temperature (T₁) = 300 K

Initial pressure (P₁) = 1 atm

Final temperature (T₂) = 600 K

Final volume (V₂) = 2 L

Final pressure (P₂) =?

Using the combine gas equation, we can obtain the final pressure of the gas as illustrated below:

[tex]\frac{P_{1} V_{1} }{T_{1}} = \frac{P_{2} V_{2}}{T_{2}}\\\\\frac{1 * 4}{300} = \frac{P_{2} * 2}{600} \\\\[/tex]

Cross multiply

300 × 2 × P₂ = 4 × 600

600 × P₂ = 2400

Divide both side by 600

[tex]P_{2} = \frac{2400}{600} \\\\[/tex]

P₂ = 4 atm

Therefore, the final pressure of gas is 4 atm.

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Elements with ________________ first ionization energies and ___________ electron affinities generally form cations.

Answers

Answer:

elements with low first ionization energies and positive or slightly negative electron affinities generally form cations.

hope it is helpful:)

What was the main reason why Alfred Wegener's theory about the movement of the continents was dismissed in 1912?

His theory explained the Earth was expanding as the plates moved

He didn't know about plate tectonics to explain how the plates moved

His map of the ocean floor did not support his theory

His theory was the first to observe the continents fit together

Answers

Answer:

His map of the ocean floor did not support his theory

Explanation:

Alfred Wegner was a great scientistHe observed the plate tectonics of earth and described it in a theory.It was dismissed after viewing his ocean floor

Answer:

He didn't know about plate tectonics to explain how the plates moved

Explanation:

Wegener believed the continents had pushed through the ocean floor. However, he did not have a satisfactory explanation for how this happened. There was no known source of energy large enough to move continents through the sea floor. Also, although scientists had data about the interior of Earth from earthquakes, there were no clues in Earth's crust to show that the continents had broken through the sea floor. Given this lack of evidence to explain the mechanism of continental drift, scientists did not accept this idea.

What is the pressure in millimeters of mercury inside a container of gas.

Answers

Atmospheric pressure is 754.6 mm Hg and the density of mercury is 13.546 g/mL.

How do you think getting fewer of these molecules to her cells contributed to Elisa’s tiredness?

Answers

Answer:

Elisa is always tired because her cells arent producing enough sugars also know as glucose forher body. another way to write out glucose is to use its equation C6H12O6.

Explanation:

Students figure out: Elisa feels tired because her cells aren't getting the molecules they need from food and air, which are necessary for her cells to function, grow, and repair. ... Students figure out: Elisa's cells are getting enough oxygen and amino acids, but not enough glucose

Which best describes the role of a negative feedback loop?

0 The output is reduced so the body can maintain homeostasis.
0 The output builds so the body can maintain homeostasis.
0 Hormone levels in the blood increase to increase effects.
0 Hormone levels in the blood decrease to increase effects.

Pls Hurry!!!! ANYONE PLS HELP ME!! I AM DOING THE UNIT TEST AND I NEED THIS FAST!!! APAP PPL!! PLS!! WILL MARK BRAINLIEST!!!

Answers

Answer:

A

Explanation:

now I'm not sure, but considering negative feedback allows the systems to self stabilize that would be the best option.

PLEASE NOTE THAT THIS IS A EDUCATED GUESS.

An atom has 5 protons, 4 electrons, and 5 neutrons. Which
of the following reasons represents why this is an atom of
the element boron?

A ) The atom has 5 neutrons, just like every atom of boron

B ) The atom has 4 electrons, just like every atom of boron

C ) The atom has 14 total particles, in a combination of 5-5-4 just like every atom of boron

D ) The atom has 5 protons, just like every atom of boron

< PLEASE HELP ASAP!

Answers

Answer:

i think the answer is C

Explanation:

not sure plsss dont bash im a beginner

Answer:

B ) The atom has 4 electrons, just like every atom of boron

Explanation:

HOPE IT'S HELP

please help me with the attachment down bellow its about metal nonmetal and metalloids

Answers

Answer:-

a. Non metals

b. Metals

c. Metals

d. Nonmetal

e. Metalloid

f. Metalloid

g. Metal

h. Nonmetal

i. Metal

j. Metal

k. Nonmetal

l. Nonmetal

Hope this helps you!

Question 2 of 45
Carbon has a nucleon number of 12 and a proton number of 6. How many neutrons does it have?
Enter your answer as a number

Answers

Carbon has 6 neutrons, 6 protons and 6 electrons.

When bacon is cooked, a solid fatty residue remains in the pan after cooling. What can be said about the fat in bacon based on this observation

Answers

Answer:

The fatty acids are mostly saturated.

Explanation:

Nitric acid reacts with zinc oxide.
State the names of the products of this reaction.
……………..and ....……..

Answers

Answer:

Zinc reacts with concentrated Nitric acid to produce Zinc nitrate, nitrogen dioxide and water.

That's all I know, sorry if it isnt coplete or the answer you wher looking for.

which type of spectra would be produced by a hydrogen lamp?

Answers

Answer:  Emission spectra

The Emission spectrum can be separated into three types:

Line emission spectrum Continuous emission spectra.Band emission spectrum

What is a Hydrogen lamp?

A gas of hydrogen atoms will create an absorption line spectrum if it is between you (telescope+spectrograph) and a continuum light source, and also an emission line spectrum if considered from a distinguishable angle.

When The emission spectrum of atomic hydrogen has been divided into several spectral sequences, with wavelengths given by the Rydberg formula.

These experimental spectral lines are due to the electron-making transitions between two energy positions in an atom.

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Which chemical equation represents a redox reaction?
TiCl4(s) + 2H2O(g) – TiO2(s) + 4HCl(g)
--
CaO(s) + SiO2(s) – CaSiO3)

Fe2O3(s) + 2Al(s) — Al2O3(s) + 2Fe()
+
CaCO3(s) — Cao(s) + CO2(g)

Answers

Answer:

CaCO3 yields CaO + CO2

Exclamation

Since the Decomposition state of a redox involves a broken down compound, this equation proves that this is a DECOMPOSITION since it is being broken down.

Chemical properties of water for class 8

Answers

Answer:

pH value is 7neither acidic nor basecan be found in all 3 state (ie. liquid, solid and gas {vapour})it's excellent solvent

what is temperature?​

Answers

Answer:

a measure of hotness or coldness expressed in terms of a scale like Fahrenheit or Celcius


Count the atoms in 717 grams of Nitrogen.

Answers

Answer:

3.08x10^25

Explanation:

Divide the mass in grams by the molar mass of nitrogen (14.0067), then multiply the result by Avogadro's number (6.022x10^23). Then round to the correct amount of significant figures.

How many dozens of silver atoms are in the piece of jewelry?.

Answers

the piece of jewelry contains 5.08x10 21to the power dozen Ag atoms.

In chemical compounds, covalent bonds form when -
a. the electronegativity difference between two atoms is very large
b. electrons are completely transferred between two metals
c. pairs of electrons are shared between two nonmetal atoms
d. two nonmetal ions are attracted to each other by opposite charges

Answers

Answer:

c. pairs of electrons are shared between two nonmetal atoms

Explanation:

Bonding between elements solely depends on their electronegativity. When there is large difference in electronegativity, those atoms form ionic bonds. Covalent bonds form when the difference is minimal, or none at all. When the difference between electronegativities is 0 or very close to 0, then they form pure covalent bonds, or nonpolar bonds. An example of this are diatomic molecules. Diatomic molecules are two of the same atom that form nonpolar covalent bonds because their electronegativy difference is 0, as they have the same electronegativity. When the electronnegativties have bit of difference, they form polar covalent bonds.

Every magnet must have what at its ends?
O A. A positive charge and a negative charge
B. A positive charge and a north pole
C. A north pole and a south pole
D. A south pole and another south pole

Answers

Answer:

one end is the north pole and the other is the south pole.

Explanation:

a north pole will attract a south pole; the magnets pull on each other. But the two north poles will push each other away. ... A compass is a tiny magnet balanced on a point so it can turn freely.

¿Qué relación existe entre la teoría del octeto de Lewis con los enlaces iónicos y
covalentes?

Answers

Por definición de enlace iónico, covalente y regla del octeto, la relación existente entre la teoría del octeto de Lewis con los enlaces iónicos y  covalentes es que dichos enlaces se producen con el objetivo de completar la última capa de electrones y adquirir estabilidad.

Enlace iónico

Por un lado, se produce un enlace iónico entre átomos metálicos y no metálicos, donde los electrones se transfieren completamente de un átomo a otro. Durante este proceso, un átomo pierde electrones y otro los gana, formando iones. Por lo general, el metal cede sus electrones formando un catión al elemento no metálico, que forma un anión.

Enlace covalente

Por otro lado, el enlace covalente es el enlace químico entre átomos donde los electrones se comparten, formando una molécula. Se establecen enlaces covalentes entre elementos no metálicos. El par de electrones compartidos es común a los dos átomos y los mantiene unidos.

Regla del octeto

En ambos casos se cumple con la regla del octeto, que establece que los átomos de los elementos se enlazan unos a otros en el intento de completar su capa de valencia con ocho electrones. Es decir que los átomos van a tender a ceder o compartir electrones para completar ocho electrones en la capa de valencia mediante un enlace iónico, covalente o metálico.

En otras palabras, el objetivo es tener la configuración electrónica del gas noble más cercano, teniendo así la última capa de electrones completa y adquiriendo estabilidad.

En resumen

En resumen, la relación existente entre la teoría del octeto de Lewis con los enlaces iónicos y  covalentes es que dichos enlaces se producen con el objetivo de completar la última capa de electrones y adquirir estabilidad.

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what is the coefficient for 4K2CO3

Answers

It should be K= 8 C= 4 O= 12.

Whether a hydrogen-based energy system is environmentally cleaner than a fossil fuel system depends on ________. the car driven governmental incentives for research the amount of fossil fuels that are invested in long-term storage the source of oxygen used for the process the source of energy used to produce the hydrogen

Answers

A hydrogen energy system is made up of hydrogen production, transportation, storage, utilization etc. Whether a hydrogen-based energy system is environmentally cleaner than a fossil fuel system depends on the source of energy used to produce the hydrogen.

Hydrogen fuel cells often makes electricity by using  hydrogen and oxygen atoms. The hydrogen is said to reacts with oxygen across an electrochemical cell.

Hydrogen is known to carry some amount of energy carrier and can also deliver or store a large amount of energy. Hydrogen is often used in fuel cells to generate electricity, or power and heat.

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What will happen to the density of the water if i put salt in it.

Answers

Answer:When salt is dissolved in fresh water, the density of the water increases because the mass of the water increases.

Explanation:

I do believe i need help.....

Answers

Answer:

C,D, and A I believe

Explanation:

what is the solute when stirring salt in water until the salt disappears?

Answers

Answer:

The solute is the substance being dissolved.

The solvent is the substance dissolving the solute.

Therefore, the salt is the solute and the water is the solvent.

Explanation:

The salt is the solute.

What is infrared energy? simplify it

Answers

Infrared energy is the energy of light between microwave radiation and Ultraviolet radiation

Answer:

It is a type of radiant energy that's invisible to human eyes but that we can feel as heat.

Describe the physical properties of Copper (Cu) based on what you know about metals, nonmetals, and metalloids

Answers

Answer:

Copper is reddish brown color

Its density is 8.93 g cm-3

highly malleable at ordinary temp, but is brittle near its melting point

god conductor of heat and electricity

Explanation:

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