General Chemistry Answers

As a chemical engineer you need to pump the products without affecting products properties.

Because the flow properties will affect the fluid properties of the products like density and

viscosity. Pumping without destroying product integrity is as important as the heat

exchanger that comes after the pump. The piston pumps can handle very delicate and

viscous food stuffs and can pump up to very high pressure without damaging the food

particles. It can also be applied very successfully in heavy duty applications for industries

other than the food industry.

Answer the following

 Does not break the product

 Delivers high flow rates (up to 20 m 3 /hr)

 Allows high pressure drop (20 bar)

 Can work under vacuum

 Is self-priming

a) Calculate the distance travelled by an electron when it moves form 1st shell to 3rd shell of hydrogen atom.

b) Also calculate the amount of energy needed to send the electron from 1st to 3rd shell of hydrogen atom.

This question is a must attempt so plz answer it. Much appreciated.

Ozone, O₃, is produced by the reaction represented by the following equation: NO₂ + O₂ ⟶ NO + O₃ . What is the maximum amount of O₃ that can be produced when 56g NO₂ and 27g O₂ are reacted?

Your answer

If 86.7 g of Fe react in an excess of water, how many grams of Fe₃O₄ are produced?

3 Fe   +   4 H₂O  -------->   Fe₃O₄     +     4 H₂

1.    Upon heating, NaN_3(s) decomposes to Na_(l) and N_2(g). This reaction serves as a convenient laboratory preparation of pure nitrogen gas.

2 NaN_3(s) ¾® 2 Na_(l) + 3 N_2(g)

a)       What number of moles of NaN₃ is required to prepare 1.00 mol of N₂?

b)      What mass of N₂ is produced by the decomposition of 2.00 mol NaN₃? (

c) What mass of Na is produced when 1.75 g of N₂ is prepared? 

what volume of nitrogen gas is needed to completely react with 260 L of hydrogen in the production of ammonia?

What is the percentage by mass of solution formed by dissolving 27.0 grams of HCl in 102.0 grams of water?

1.    1.87 g of acetic acid (vinegar, C₂H₄O₂) reacts with 2.13 g of isopentyl alcohol (C₅H₁₂O) to yield isopentyl acetate (C₇H₁₄O₂), a fragrant substance with the odor of bananas. The reaction is:            C₂H₄O₂ + C₅H₁₂O ¾® C₇H₁₄O₂ + H₂O

a)       Which is the limiting reactant (LR) and excess reactant (ER)?

b)      How many grams of isopentyl acetate were formed?

c)       How many grams of the excess reactant is left after the reaction is complete?

 d)      If 2.96 g of isopentyl acetate was produced, what is the % yield of the reaction?

The bioconversion of glucose to ethanol is carriedout in a packed-bed, immobilized cell bio-reactor containing yeast cells entrapped in Ca-alginate beads. The rate-limitingsubstrateis glucose, and its concentration in the feedbulkliquidphase is S oi = 5g/l. The nutrientflowrateis F = 2L/min. The particlesize of Ca-alginate bead

The alcohol content of hard liquor is normally given in terms of the “proof,” which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the concentration (M) of alcohol that is in 1.20 L of 60-proof gin. The density of ethanol is 0.798 g/mL