Chemistry Organic Chemistry Level: Misc Level
Compare the moles of glucose and acetic anhydride in this experiment.Which is the limiting reagent?Show calculations for determing the theoretical yield of glucose pentaacetate.
Chemistry Organic Chemistry Level: Misc Level
Since one molecule of acetic anhydride esterifes each OH group, how many moles of acetic anhydride are needed for each mole of glucose?
Chemistry Organic Chemistry Level: Misc Level
What products are obtained from the reaction of alanine with each of the following;
a.NaOH solution
b.HCI solution
c.Acetic anhydride
d.NaNO2+HCI solution
Chemistry Organic Chemistry Level: Misc Level
What is the total number of isomers (including optical isomers) for a tripeptide containing; Ala, Gly, Trp?
Chemistry Organic Chemistry Level: Misc Level
Prior to precipitaion with salt,your theoretical yield of soap was dissolved in 160 ml H2O.At this soap concentration there are approximately 1018 micelles per mL.Using the Avagadro,s number, calculate how many soap molecules are present in each soap micelle.(Hint; Use dimensional analysis)
Chemistry Organic Chemistry Level: Misc Level
Why is soap not suitable for laundry use with;hard''water, whereas, the above synthetic detergent is?
Chemistry Organic Chemistry Level: Misc Level
Write the structure of a typical synthetic detergent and state why it is also a cleansing agent like soap.
Physics Work,Power & Energy Level: Misc Level
A certain mass is moving with a velocity V.If it speeds up to a final velocity 2V, its kinetic energy will
a) double b)halved c)quadrupled d) the same
Chemistry Inorganic Chemistry Level: Misc Level
How many unpaired electrons are there for Cr (#24)?
Chemistry Inorganic Chemistry Level: Misc Level
Write the electronic configuration according to the general rules in the objective for Gd (#64).
Physics Radioactivity Level: Misc Level
You are performing an experiment that uses 113 Ag.113 Ag is radioactive, decays by beta minus emission (B), and has a half-life of 5.3 hours.It requires 31.8 hours to ship the material from the warehouse to your laboratory.How many grams should you order if the experiment requires that you have 40 grams to begin the experiment?
Physics Ray Optics Level: Misc Level
Use Le Chateliers principle to explain why low pressure is used in the freeze- drying process(e.g.in making instant coffee)
Physics Magnetism,Magnetic Effects Of Current Level: Misc Level
A rectangular current loop carries a current of 8.0 A in the direction shown. A very long wire is parallel to the sides of the rectangle and carries a current I. The rectangle loop has a length of 0.80 m and its sides are 0.10 and 0.70 m from the long wire. What must be the value of the current I. in the long wire to produce an attractive net force of 2.3x 10^-6 N on the rectangly? Show on the diagram below the direction of the current in the long wire. (Diagram 1on attachment)
Physics Collisions Level: Misc Level
A block of mass m1=1.60 kg, initially moving to the right with a speed of 4.00 m/s on a frictionless horizontal surface, collides with a spring attached to a second block of mass m2=2.1 kg,moving to the left with a speed of 2.50 m/s. The spring has a spring constant of 600 N/m.a) At the instant when m1 is moving to the right with speed 3.00 m/s, determine the speed of m2. b) Determine the compression of the spring at the same moment listed in (a) above.
Physics Collisions Level: Misc Level
A block of mass m1=1.60 kg, initially moving to the right with a speed of 4.00 m/s on a frictionless horizontal surface, collides with a spring attached to a second block of mass m2=2.1 kg,moving to the left with a speed of 2.50 m/s. The spring has a spring constant of 600 N/m.a) At the instant when m1 is moving to the right with speed 3.00 m/s, determine the speed of m2. b) Determine the compression of the spring at the same moment listed in (a) above.
