debnathtonmoy93

A mixture of 45 mole % n-hexane and 55 mole % n-heptane is subjected to continuous fraction in a tray column at 1 atm total pressure. The distillate contains 90% n-hexane and the residue contains 10% n-hexane. The feed is saturated vapour. The relative volatility of n-hexane in mixture is 2.56. Determine the minimum reflux ratio for this separation.

Bring your own device or BYOD is great for some companies. I don't think every business needs to implement it or should implement it. There are inherent security risks when employees use their own devices for work related matters. They are not always on a secure network and usually have personal e-mail accounts on them as well as internet searches that may not be suitable or appropriate for business. Then there are very small companies that choose to save some money and have employees use their own device. If there are no real security threats and mainly used for email this will probably work out ok for everyone. In my current field it is just easier to use my own device even though we don't have a written policy regarding it. 

I need to expand on the above writing.

A roller coaster climbs a hill, then travels down the other side and up another hill. Where is the greatest?

a. At the top of the first hill

B)Halfway up the hill

c. At the bottom of the hill

d. At the top of the second hill

What is ESR

What mass of citric acid is produced from exactly 1 metric fon (1.000 x 103 kg) of sucrose if the yield is 92.30%?

Which of the following is not true about enzymes?

Which molecule do you expect to have the highest solubility in water? 

List 1 advantage and 1 disadvantage of telephone, personal, mail, email. and internet surveys.

Describe the construction and working of nicol prism

35Cl2 (560 cm-1), 39K35Cl (281 cm-1), 1H2 (4401 cm-1). Calculate the force constants for these molecules if treated as harmonic oscillators. 

I conducted an experiment. I did a reaction were I started with aluminum and remade aluminum crystals. I began with .5 g of Aluminum foil but when I weighed the collection (where I added ethanol) I weighed 6g. Now if the weight of the ethanol was 5.753g what is my actual and theoretical yields?

I know I can calculate average power by using the work done perunittime.

I thought I could also use (for a rotational problem) torquetimesangular velocity.

I tried to use torque times angular velocity for thefollowingproblem and got it wrong. Why?

Calculate the average power required to accelerate the Earth in4days from rest to its present qngular speed about its axis.

I used I = 2/5 MR² = 9.71e37 kg m ², ω=7.27e-5 rad/s , α = 2.104e-10 rad/s²,
τ = 2.04e28 N m ; KE = 2.57e29 J

If I use P = KE/t I get P = 7.42e23 W, if I use P = τ (dot)ω I getP = 1.48e24 W

Why aren't they equal? What am I missing?

A chemist determined by measurements that

0.0750

moles of calcium participated in a chemical reaction. Calculate the mass of calcium that participated in the chemical reaction.

Round your answer to

3 significant digits.

Four liquids are described in the table below. Use the second column of the table to explain the order of their freezing points, and the third column to explain the order of their boiling points.

For example, select '1' in the second column next to the liquid with the lowest freezing point. Select '2' in the second column next to the liquid with the next higher freezing point, and so on. In the third column, select '1' next to the liquid with the lowest boiling point, '2' next to the liquid with the next higher boiling point, and so on.

Note: the density of water is /1.00gmL .
solution freezing point boiling point 6.5 g of potassium iodide (KI) dissolved in 100. mL of water (choose one) 1(lowest) 2 3 4(highest) (choose one) 1(lowest) 2 3 4(highest) 6.5 g of potassium chloride (KCl) dissolved in 100. mL of water (choose one) 1(lowest) 2 3 4(highest) (choose one) 1(lowest) 2 3 4(highest) 6.5 g of ethylene glycol (C2H6O2) dissolved in 100. mL of water (choose one) 1(lowest) 2 3 4(highest) (choose one) 1(lowest) 2 3 4(highest) 100. mL of pure water

Why are AgNo3 and KSCN not primary standard substance?

Consider the cell diagram Mg(s)| MgSO4 (0.40M) || NiSO4 (0.60M) |Ni(s). Calculate the cell voltage at 25?. How does the cell voltage change when: a. [Mg^(2+) ] is decreased by a factor of 4 b. [Ni^(2+) ] is decreased by a factor of 3

Suppose that we have two contestants on "The Biggest Loser."William's starting weight is 352 pounds and loses down to 187 pounds.Karen's starting weight is 453 pounds and loses down to 245 pounds.

Answer the following questions in your post. The post should be written in complete sentences and include proper punctuation.

1..What kind if feelings/emotions/thoughts did this activity elicit in you? Why

2. Who deserves to win? Make your case and support your reasoning

Wbu of the following was NOT a side effect of the experiments Beaumont performed on Alexis St Martin?

Chloroacetic acid has a dissociation constant of ka =0.000138 calculate the degree of dissociation for 0.0825m solution of this acid using the Debye -Huckel limiting law 

3.26 Discussion: Observing Mitosis

Describe to your classmates the steps of mitosis that you identified. Explain how you were able to tell one stage from another stage.

Pt(s) l OH^-(aq) l O₂(g) ll OH^-(aq), H₂O(l) l H₂(g), Pt(s)

PHYSICS - ELASTIC POTENTIAL ENERGY

What is an unknown compound?

What phenotypes are expected from kittens born from a dihybrid cross of 2 parents with genotypes FfBb and FfBB? What ratio of phenotypes would be expected?

Calculate the number of moles of solute present in 500 mL of a 0.75 M solution of magnesium chloride (MgCl2).

1) Find the moles of each element in 1.25 mol of Na2CO3.

2) Convert 2.50 mol of Na2CO3 to mass in g.

3) Convert 5.50 g of Na2CO3 to mol.

4) Covert 5.50 g of Na2CO3 to number of particles.

Find the moles of each element in 1.25 mol of Na2CO3.

One summer day a group of students were jumping from a railroad bridge into the Snohomish River. They stepped off the bridge when they jumped, and they hit the water 1.5 seconds later. How high was the bridge?

5.0 m

8.0 m

9.5 m

11 m

As a train accelerates away from a Station, it reaches a speed of 3.9 m/s in 7.2 seconds. If the train's acceleration is constant, what is it's speed after an additional 4.5 seconds have elapsed?

A) 3.8 m/s

B) 4.2 m/s

C) 5.7 m/s

D) 6.3 m/s

Determine the mass of SO2 that contains 4.625 × 1026 S atoms

What are [h3o=][oh-] and poh with of 9.85?

what is the electric field strength at a point where a   charged object experiences an electric force of N?

A 50.0 kg object travelling at 1.0 m/s to the right collides with a 20.0 kg object travelling to the left at 15.00 m/s. if the 20.0 kg object has a velocity of 3.65 m/s to the right after the collision, what is the velocity of the 50.0 kg object after the collision?

At 500 °C hydrogen iodide decomposes according to 2HI(g) arrows going back and forth H2(g)+ I2(g) For HI(g) heated to 500 °C in a 1.00-L reaction vessel, chemical analysis determined the following concentrations at equilibrium: [H2] = 0.382 M, [I2] = 0.382 M, and [HI] = 3.23 M. If an additional 1.00 mole of HI(g) is introduced into the reaction vessel, what are the equilibrium concentrations after the new equilibrium has been reached?

Ok so I am given H2 + I2 = 2HI
.500 mol H2
1.00 mole I2
placed in a 10 L vessel what is the mole fraction of HI in mixturewhen equilibrium is reached at 205C
I have an appendix that provides deltaG,H ect
from this I conclude that I have a reaction that has 16.208KJ/mol
an equilibrium constain of K= 1.44x10^-3
I have a K2 = 6.14x10^-3

and delta G of 16.208. What is the mole fraction of this reaction?