if your commute is 20 miles and you drive an average speed of 60 km/h how many minutes will it take you to get to work

By loading the TLC plate from a solution with the eluted solution, the extraction of a required material after chromatography can be done through the eluted solution.

An eluted solution is generally used for the separation or extraction of one material from other through washing with the eluted solution.

By doing so, separate layers could be obtained. This process is usually done for extracting the pure form of RNA from cells, primary cell isolates, and animal and plant tissues from tumors.

Elution refers to the extraction of a substance from the solid adsorbed medium after the process of chromatography without impurities with the help of a solvent.

So, when a TLC plate is loaded from a solution to an eluted solution, then the adsorbed material from the solid medium gets extracted or separated. This would be the possible outcome.

To know more about chromatography, click below:

https://brainly.com/question/11960023

#SPJ4

The volumes of 0.100 M acetic acid and 0.100 M sodium acetate that would be required to produce 1.00 L of buffer at pH 4.000 are 437 mL of acetic acid and 313 mL of sodium acetate.

To calculate the volumes of acetic acid and sodium acetate required to prepare a buffer at pH 4.000, we need to use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

where pH is the desired pH of the buffer, pKa is the dissociation constant of the weak acid (acetic acid), and [A-]/[HA] is the ratio of the concentration of the conjugate base (acetate ion) to the concentration of the weak acid (acetic acid).

Rearranging the equation, we get:

[A-]/[HA] = 10^(pH - pKa)

Substituting the given values, we get:

[A-]/[HA] = 10^(4.000 - 4.752) = 0.563

This means that the concentration of the acetate ion should be 0.563 times the concentration of the acetic acid in the buffer.

Let's assume we want to prepare 1.00 L of the buffer. Since the concentrations of both acetic acid and sodium acetate are the same (0.100 M), we can use the formula for the total concentration of a solute in a solution:

C = n/V

where C is the concentration, n is the quantity of solute, and V is the volume of the solution.

We may use the following formula to calculate the amount of acetic acid required:

n(acetic acid) = C(acetic acid) x V(total) x [HA]/([A-] + [HA])

where [HA]/([A-] + [HA]) is the ratio of the concentration of the weak acid to the total concentration of acid (weak acid + conjugate base).

Substituting the given values, we get:

n(acetic acid) = 0.100 x 1.00 x 0.437/ (1 + 0.563) = 0.0437 mol

To calculate the volume of acetic acid needed, we can use:

V(acetic acid) = n(acetic acid)/C(acetic acid)

Substituting the calculated value of n(acetic acid) and the given value of C(acetic acid), we get:

V(acetic acid) = 0.0437/0.100 = 0.437 L = 437 mL

Similarly, to calculate the amount and volume of sodium acetate needed, we can use:

n(sodium acetate) = C(sodium acetate) x V(total) x [A-]/([A-] + [HA])

Substituting the given values, we get:

n(sodium acetate) = 0.100 x 1.00 x 0.563/ (0.563 + 1) = 0.0313 mol

V(sodium acetate) = n(sodium acetate)/C(sodium acetate)

Substituting the calculated value of n(sodium acetate) and the given value of C(sodium acetate), we get:

V(sodium acetate) = 0.0313/0.100 = 0.313 L = 313 mL

Therefore, to prepare 1.00 L of a buffer at pH 4.000 using 0.100 M acetic acid and 0.100 M sodium acetate, we need to mix 437 mL of acetic acid and 313 mL of sodium acetate.

For more such questions on buffer, click on:

https://brainly.com/question/13076037

#SPJ11

Answer:

A liquid changes to gas

Explanation:

"Evaporation is the process by which water changes from a liquid to a gas or vapor. Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor."

Answer:

B

Explanation:

Giving the answer

The atmosphere of Venus consists maximum of carbon dioxide. The correct option is B.

With extreme surface temperatures approaching 735 K and an atmospheric pressure 90 times that of Earth, Venus's conditions make water-based life as we know it on the planet's surface unlikely.

The atmosphere is also full of carbon dioxide which makes it impossible to sustain life.

Thus, the correct option is B.

For more details regarding life on Venus, visit:

https://brainly.com/question/23627592

#SPJ2

The mass of iron should be produced if 11. 0g of aluminum reacts with 30. 0g of iron (III) oxide is 10.50 g.

To determine the mass of iron produced, we need to use stoichiometry and the balanced chemical equation for the reaction between aluminum and iron(III) oxide.

The balanced chemical equation is:

2 Al + \(Fe_{2} O_{3}\) →  + 2 Fe

From the equation, we can see that 2 moles of aluminum react with 1 mole of iron(III) oxide to produce 1 mole of iron.

First, we need to determine the limiting reactant by comparing the number of moles of aluminum and iron(III) oxide.

Moles of aluminum = mass of aluminum / molar mass of aluminum

= 11.0 g / 26.98 g/mol (molar mass of aluminum)

= 0.407 mol

Moles of iron(III) oxide = mass of iron(III) oxide / molar mass of iron(III) oxide

= 30.0 g / 159.69 g/mol (molar mass of iron(III) oxide)

= 0.188 mol

Since the stoichiometric ratio of aluminum to iron(III) oxide is 2:1, we can see that 0.188 mol of iron(III) oxide requires 0.376 mol of aluminum. However, we have only 0.407 mol of aluminum, which is in excess.

Therefore, the limiting reactant is iron(III) oxide. The amount of iron produced is determined by the moles of iron(III) oxide used. Moles of iron = 0.188 mol (same as moles of iron(III) oxide)

Now we can calculate the mass of iron produced using its molar mass (55.85 g/mol):

Mass of iron = Moles of iron × Molar mass of iron

= 0.188 mol × 55.85 g/mol

= 10.50 g

Therefore, the mass of iron produced is approximately 10.50 grams.

Know more about the Balanced chemical equation here:

https://brainly.com/question/13451900

#SPJ8

Answer:

from which chapter is this question

Answer:

The sun

Explanation:

The sun is the center of the solar system and all the planets orbit around it (moons orbit around respective planets which orbit around the sun)

Answer:

The Sun.

Explanation:

☀️
The Sun is like the “power house” of the solar system, we rely on it, and everything orbits around it.

(a) The electron configuration of fluorine is 1s² 2s² 2p⁵.

(b) The electron configuration of Phosphorus is 1s² 2s² 2p⁶ 3s² 3p³.

(a) Fluorine (F) with atomic number 9:

The electron configuration of fluorine can be determined by sequentially filling up the orbitals with electrons, following the Aufbau principle and the Pauli exclusion principle. The atomic number 9 tells us that fluorine has 9 electrons.

1s² 2s² 2p⁵

Energy Level Diagram: Refer fig 1

(b) Phosphorus (P) with atomic number 15:

Following the same principles, we can determine the electron configuration of phosphorus with its atomic number of 15.

1s² 2s² 2p⁶ 3s² 3p³

Energy Level Diagram: Refer fig 2

In the energy level diagram, each line represents an energy level or shell, while the superscripts indicate the number of electrons in each orbital. The arrows represent the electrons, with the upward arrow indicating a spin-up electron and the downward arrow indicating a spin-down electron.

Learn more about electron configuration from the link given below.

https://brainly.com/question/29157546

#SPJ4

If a molecule has an uneven distribution of electrons then it is polar molecule and it will not be dissolved in water because the distribution of electrons around the molecule is no longer symmetrical.

This is referred to as a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end.

A polar covalent bond is a covalent bond in which the atoms have an unequal attraction for electrons and so the sharing is unequal. In a polar covalent bond, sometimes simply called a polar bond, the distribution of electrons around the molecule is no longer symmetrical.

Read more about Polarity here https://brainly.com/question/17118815

#SPJ1

To calculate the pH during the titration of 20.00 mL of 0.1000 M CH₃CH₂COOH with 0.1000 M CSOH after 11.09 mL of the base have been added. The pH  value is = -log₁₀[H₃O⁺]

The balanced equation for the reaction between propanoic acid (CH₃CH₂COOH) and sodium hydroxide (NaOH) is as follows:

CH₃CH₂COOH + NaOH → CH₃CH₂COONa + H₂O

(CH₃CH₂COOH) = 20.00 mL

(CH₃CH₂COOH) = 0.1000 M

(CSOH) = 11.09 mL

(CSOH) = 0.1000 M

Initial moles of propanoic acid = (20.00 mL × 0.001 L/mL) × 0.1000 M

moles of sodium hydroxide = (11.09 mL × 0.001 L/mL) × 0.1000 M

moles of propanoic acid reacted = moles of sodium hydroxide added

remaining moles of propanoic acid = initial moles of propanoic acid - moles of propanoic acid reacted

Next, we can calculate the volume of the solution after the addition of sodium hydroxide:

we need the Ka (acid dissociation constant) of propanoic acid to proceed with the calculation.

Now we can rearrange the equation to solve for [H₃O⁺]:

Ka = [H₃O⁺]/0.00200 mol[H₃O+] = Ka * 0.00200 mol / 0.0445 mol/L

[H₃O⁺] = Ka * 0.0449 mol/L

Finally, we can calculate the pH:

pH = -log₁₀[H₃O⁺]

To learn more about  ka of propanoic acid

brainly.com/question/31218961

#SPJ4

Answer:

chemistry

Explanation:

it is the study of structer, composition and change that matter undergoes

There are 4 moles of spectator ions that remain in solution.

The equation of the reaction is;

Na2CO3(aq) + Pb(NO3)2(aq) -------> PbCO3(s) + 2NaNO3(aq)

We have to determine the limiting reactant. This is the reactant that yields the least amount of product. Note that the spectator ions are Na^+ and NO3^- that form NaNO3.

For Na2CO3

1 mole of Na2CO3 yields 2 moles of NaNO3

3 moles of Na2CO3 yields  3 × 2/1 = 6 moles of NaNO3

For Pb(NO3)2

1 mole of Pb(NO3)2 yields 2 moles of NaNO3

2 moles of Pb(NO3)2 yields 2 × 2/1 = 4 moles of NaNO3

We can see that Pb(NO3)2 is the limiting reactant.

Since [NaNO3] = [Na^+] = [NO3^-], it follows that there are 4 moles of spectator ions that remain in solution.

Learn more: https://brainly.com/question/22885959

Answer:

[HClO₄] = 0.35 M

Explanation:

Neutralization reaction is:

HClO₄ + LiOH  →  LiClO₄  +  H₂O

In this case, we have a titration between a weak acid and a strong base.

In chemistry it is also called an acid base equilibrium.

HClO₄  +  H₂O  ⇄  ClO₄⁻   +  H₃O⁺       Ka

The weak acid is firstly neutralized by the strong base, in order to have a buffer solution before the equivalence point.

When we reach the equivalence point, mmoles of acid = mmoles of base and there is a formula to determine it so:

M acid . Volume of acid = M base . Volume of base

M acid . 100 mL = 0.75 M . 46.9 mL

M acid = (0.75 M . 46.9 mL) / 100 mL → 0.35 M

Ten different pollinators plants or trees or flowers are Bee balm, Black-eyed Susan, Butterfly weed, Coneflower, Lavender, Milkweed, Redbud tree, Sunflower, Wild rose, and Zinnia.

Pollinator plants are known as plants that attract and support pollinators, such as bees, butterflies, birds, and other insects or animals. The pollinators they attract help transfer pollen from one flower to another.

When pollinators tranfer pollens, they facilitate the fertilization and reproduction of flowering plants.

Find more exercises on pollinator plants;

https://brainly.com/question/21076663

#SPJ1

Answer:

Hey mate

Explanation:

Yes these methods are only used in biology, chemistry, physics, geology and physcology.... They can't be used in maths or other subject, as it is said SCIENCE IS SCIENCE!

Hope it helps you,

mark me the brainliest,

follow me

question 11 = B.metal,loses electrons

Answer:

question 1 i believe is c i will put the other answeres in comments

when i finish the test

Explanation:

The carbon cycle plays an important in maintaining carbon balance on the earth.

The carbon cycle is the cycle by which carbon is recycled between the atmosphere and the geosphere.

In the carbon cycle, the process of recycling carbon do not include deep burial, compaction, and cementation.

Volcanic eruptions are one natural way that carbon can move OUT of the geosphere.

Fossil fuels, atmosphere, land biomass and rocks are all carbon reservoirs, but fossil fuels contains the MOST carbon.

The atmosphere is the carbon reservoir that changes the quickest and has the biggest direct effect on climate.

Ocean acidification occurs because the ocean absorbs more human-produced CO2, causing the acidity to increase.

A potential impact of ocean acidification is that ocean ecosystems may suffer, making it harder for humans to get food from the ocean.

Therefore, the carbon cycle is important in maintaining carbon balance on the earth.

Learn more about carbon cycle at: https://brainly.com/question/25845923

Answer:

3.2x10⁻⁶M of sulfate ion can be added

Explanation:

The solubility of SrSO4 is:

SrSO4(s) → Sr²⁺(aq) + SO₄²⁻(aq)

Where Ksp is defined as:

Ksp = 3.2x10⁻⁷ = [Sr²⁺] [SO₄²⁻]

The concentration of Sr is:

0.10mol / 1L = 0.10M = [Sr²⁺]

Replacing in Ksp:

3.2x10⁻⁷ = [0.10M] [SO₄²⁻]

[SO₄²⁻] = 3.2x10⁻⁶M of sulfate ion can be added

The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.

Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.

Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.

According to the given data;

Decomposition of carbon monoxide (CO);

Oxygen produced = 3.36 g

Carbon produced = 2.52 g

We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;

Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol

Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol

Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;

0.21 mol C / (0.21 mol O) = x

Simplifying the equation, we have;

x = 1

Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.

Decomposition of carbon dioxide (CO₂);

Oxygen produced = 9.92 g

Carbon produced = 3.72 g

Following the same calculations as before;

Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol

Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol

Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;

0.31 mol C / (0.62 mol O) = y

Simplifying the equation, we have;

y = 0.5

Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.

To know more about decomposition here

https://brainly.com/question/20418092

#SPJ4

--The given question is incomplete, the complete question is

"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--

1.  Before the bond, let's consider the individual atoms involved in the ionic bonding of CaCl₂.

2. The arrows in the Bohr model diagram would indicate the transfer of electrons from calcium to chlorine, showing the movement of the electrons to achieve stability in both ions.

#1: Before the bond, let's consider the individual atoms involved in the ionic bonding of CaCl₂.

Calcium (Ca):

Number of protons: 20

Number of neutrons: 20 (assuming a stable isotope)

Number of electrons: 20

Chlorine (Cl):

Number of protons: 17

Number of neutrons: 18 (assuming a stable isotope)

Number of electrons: 17

In the Bohr model, the electrons are arranged in energy levels or shells around the nucleus. The first energy level can hold a maximum of 2 electrons, the second energy level can hold up to 8 electrons, and so on.

For calcium (Ca), the electron configuration would be 2, 8, 8, 2, with the two valence electrons in the outermost energy level.

For chlorine (Cl), the electron configuration would be 2, 8, 7, with seven valence electrons in the outermost energy level.

#2: After the ionic bond has occurred between calcium (Ca) and chlorine (Cl), electrons are transferred from calcium to chlorine to achieve stability.

Calcium loses its two valence electrons, becoming Ca²⁺ (with a 2+ charge), which results in a stable electron configuration of 2, 8, 8.

Chlorine gains two electrons, filling its outermost energy level and achieving a stable electron configuration of 2, 8, 8.

In the resulting ionic compound CaCl₂, the calcium ion (Ca²⁺) and two chlorine ions (Cl⁻) are attracted to each other due to the opposite charges. The two chloride ions bond with the calcium ion, forming an ionic lattice structure.

In the Bohr model after the ionic bond, the calcium ion (Ca²⁺) would have an empty outermost energy level, while each chlorine ion (Cl⁻) would have a completely filled outermost energy level.

For more such questions on ionic bonding visit

https://brainly.com/question/977324

#SPJ8

Answer:

thermal shock

Explanation:

the temperatures inside the glass jar should have continued to increase over time. Internal stresses due to uneven heating. This is also known as “thermal shock”.

In general, the thicker the glass, the more prone it will be to breaking due to the immediate differences in temperature across the thickness of glass.

Borosilicate glass is more tolerant of this, as it has a higher elasticity than standard silicon glass.

You may also note that laboratory test tubes and flasks are made with thinner walls, and of borosilicate glass, when designated for heating.

(a) The 95% confidence interval for the difference between the average growth rate of the plants between the 2 gardening seasons is 1.55 ± 0.187 inches.

(b) The 95% interval from question 8a is narrower than the interval in this question (part a).

(c) The 95% interval from this question (part a) is more convincing in making a point that the head gardener should start using the newer fertilizer, if there is a difference.

Explanation to the short answers written above is written below,

(a) To construct the 95% confidence interval, we use the formula:

Confidence interval = sample mean ± (critical value * standard error)

In this case, the sample mean difference in monthly growth rate is 1.55 inches, and the standard deviation is 0.093 inches. Since the sample size is 49, we can assume the sampling distribution is approximately normal.

Using the appropriate critical value (which depends on the desired confidence level), we can calculate the standard error and construct the interval.

(b) The 95% interval from question 8a is narrower because it was constructed using a larger sample size (100 plants) compared to the current question (49 plants). A larger sample size provides more precise estimates and reduces the standard error, resulting in a narrower confidence interval.

(c) The 95% interval from this question (part a) is more convincing in making a point that the head gardener should start using the newer fertilizer, if there is a difference.

This is because the interval in this question has a smaller margin of error, indicating a higher level of precision in estimating the true difference in growth rates.

A smaller margin of error suggests a more reliable and accurate estimate, providing stronger evidence to support the conclusion that the newer fertilizer has a significant impact on plant growth.

To know more about "Growth rate" refer here:

https://brainly.com/question/15457588#

#SPJ11

21.3 days will be taken to consume 1000kg glucose.

Fermentation is an alcoholic process where 1 molecule of glucose is converted to 2 molecules of CO2 and 2 molecule of ethanol/ethyl alcohol.

Fermentation takes place in absence of oxygen, which means in anaerobic conditions.

It takes place in presence of enzyme zymase.

The formula for alcoholic fermentation,

C6H12O6 -> 2C2H5OH + 2CO2

From the data given,  we know

5 hr. = 8 kg alcohol.

Days to consume = 1000 kg glucose.

Mol ethanol:

5000/46 = 108.7 moles.

1/2 X 108.7 = 54.35

hence, 54.35 moles are produced in 5 hours.

moles of 1000kg of glucose:

10⁶g/180g/mol = 5555.5 moles.

so for 5555.5 moles the days we need is

5555.5/54.35 X 5 hours

= 511.085h

= 21.3 days.

To know more about alcoholic fermentation,

https://brainly.com/question/20662833

#SPJ4

The condensed structural formula for the product of the reaction of 2-butene with water and a strong acid catalyst is shown below ,

First write the condensed structural formula of 2-butene and indicate that it reacts with water. Then write the condensed structural formula of 2-butanol after the reaction arrow to indicate that it is the product. Finally, write the formula for the catalyst above the arrow.

The acid first attack at double bonded carbon of 2-butene and produce stable carbocation then water molecule attack on carbocation followed by deprotonation .

To learn more about strong acid please click here ,

https://brainly.com/question/16749233

#SPJ4

Yes, an electron cause an electromagnetic wave to vibrate.

One of the waves is propagated by simultaneous periodic variations of electric and magnetic field intensity and that includes radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Electromagnetic waves are produced when something vibrates—an electric charge that moves back and forth.

When an electric charge vibrates, the electric field around it changes. Because the electric charge is in motion, it also has a magnetic field around it.

This magnetic field also changes as the charge vibrates.

Therefore, an electron causes an electromagnetic wave to vibrate.

Learn more about the electromagnetic wave here:

https://brainly.com/question/3596193

#SPJ1

The volume of the ethane sample at STP will be 27.6 L given that volume of the sample at 440 torr and 29°C is 2.98 L.

STP means Standard Temperature and Pressure. The standard temperature is 273 K and the standard pressure is 1 atm or 760 torr.1 atm = 760 torr1 L at STP = 22.4 L at 440 torr and 29°C

The volume of a sample of ethane at STP can be calculated as follows:

PV = nRTAt 440 torr and 29°C:V1 = 2.98 L, P1 = 440 torr, T1 = 29°C + 273 = 302 K

At STP:V2 = ?, P2 = 1 atm, T2 = 273 K

From the ideal gas law:

PV = nRTFor both the initial and final states, the number of moles remains the same.n1 = n2Let's substitute all the values.P1V1/T1 = P2V2/T2

We are solving for V2.V2 = (P1V1T2)/(P2T1)V2 = (440 torr × 2.98 L × 273 K)/(1 atm × 302 K)V2 = 27.6 L

The volume of the ethane sample at STP will be 27.6 L.

More on STP volume: https://brainly.com/question/9570673

#SPJ11

Answer:

Matter cannot be created or destroyed in chemical reactions.

Explanation:

Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions

Answer:

Mass is conserved in chemical reactions because the atoms are just rearranged. Any atoms of an element that you have in the reactants is still there in the products, just combined differently with other atoms. The mass of an atom is the same before and after the reaction, so the total mass of the reactants and products is equal.

Explanation:

Got the question right on an assignment

The silver ring of the same mass of 27.5 gm of gold will have 1.9 times more atom.

We need to find moles first,

Moles = mass/ Atomic Mass

Then number of atoms can be calculated from moles,

So , no. of moles of gold ring = 27.5g/196.967

= 0.13 moles.

Since 1 mole contains 6.023 x 10^23 atoms, then 0.13 mole contains (6.023 c 10^23) x 0.13 atoms

= 7.82 c 10^22 atoms.

no. of moles for silver = 27.5/107.87

= 0.25 moles.

This contains (6.023 x 10^23) x 0.27 atoms.

= 1.5 x 10^23 atoms.

So 27.5g of silver contains 1.67 x 10^23/9.17 x 10^22 more atoms than 27.5g of gold.

So 27.5g silver contains 1.9 x more atoms than 27.5g of gold.

To know more about atoms, click here,

brainly.com/question/6258301

#SPJ4