Starting with 1.2 g of trans-chalcone and 0.85 g of ethyl
acetoacetate, you obtained 1.64 g...
Starting with 1.2 g of trans-chalcone and 0.85 g of ethyl
acetoacetate, you obtained 1.64 g of the final product. Calculate
the theoretical and percentage yield of the reaction.
Ethyl and Egbert are starting their family. Ethyl has free
earlobes, but her mother has attached earlobes; Ethyl is not able
to roll her tongue. Egbert also has free earlobes, but he is able
to roll his tongue. Egbert's son from a previous marriage has
attached earlobes and is a non-roller.
What are Ethyl's and Egbert's genotypes for these two genes?
Fill in your answers on the answer page.
If Ethyl and Egbert have a large family, what fraction of...
The zinc content of a 1.64 g ore sample was determined by
dissolving the ore in HCl, which reacts with the zinc, and then
neutralizing excess HCl with NaOH. The reaction of HCl with Zn is
shown below.
The ore was dissolved in 150 mL of 0.600 M HCl, and the
resulting solution was diluted to a total volume of 300 mL. A 20.0
mL aliquot of the final solution required 8.71 mL of 0.510 M NaOH
for the HCl...
The zinc content of a 1.64 g ore sample was determined by
dissolving the ore in HCl, which reacts with the zinc, and then
neutralizing excess HCl with NaOH.
The ore was dissolved in 150 mL of 0.600 M HCl, and the
resulting solution was diluted to a total volume of 300 mL. A 20.0
mL aliquot of the final solution required 8.71 mL of 0.510 M NaOH
for the HCl present to be neutralized. What is the mass percentage...
Consider a two-period binomial model with u=1.2 and d=0.85. What
is the current equilibrium price of a call with a strike price of
$20.00, if shares of stock are currently trading at $20, and the
one-period risk free rate is 4%?
The equilibrium constant for the reaction CCl4(g) =
C(s) + 2Cl2(g)
at 700ºC is 0.85. Determine the initial pressure of carbon
tetrachloride that will produce a total equilibrium pressure of
2.30 atm at 700ºC.
Suppose you disolve 1.2 g of KH2PO4 in 1L of water and then
adjust the pH of the solution to 6.8. What are the concentrations
of the species listed below?
A) [H3PO4]
B) [H2PO−4]
C) [HPO−24]
D) [PO−34]
a) What is the theoretical yield of ethyl chloride in the
reaction of 19.9 g of ethylene with 50 g of hydrogen chloride? (For
ethylene, MW=28.0amu; for hydrogen chloride, MW=36.5amu; for ethyl
chloride, MW=64.5amu.)
H2C=CH2+HCl→CH3CH2Cl
b) What is the percent yield if 24.0 g of ethyl chloride is
actually formed?
o test H0:σ=1.2 versus H1:
σ≠1.2, a random sample of size n=22 is obtained from
a population that is known to be normally distributed.
(a) If the sample standard deviation is
determined to be s=0.8, compute the test
statistic.
(b) If the researcher decides to test this
hypothesis at the α=0.10 level of significance, determine
the critical values.
(c) Will the researcher reject the null
hypothesis? Why?
that's all the question stated