11/22/17

Tu aimes le cafe
Tu aimes le cafe je parle
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11/22/17

If you react an ester with an organometalic would you just get a tertiary alcohol?
If you react an ester with an organometalic would you just get a tertiary alcohol?
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11/22/17

which place values are concerned when rounding to the nearest cent?
please give examples
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11/21/17

how do you calculate the concentration of a working solution of a mixture of 20ml of riboflavin and 80ml of NaCl solution?
This is for a Spectrophotometry Lab. the molarity of the riboflavin stock is 2.526*10^-4 And I found that the grams of NaCl used in the NaCl solution is 2.922g
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11/21/17

How to work out Vmax / Km
from a lineweaver burk plot, I have calculated slopes of 12.42 and 1.38.   The y intercept is 1.493 and 1.031 w/ respect to the slopes.   Please include working out if possible thanks 
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11/21/17

lineweaver burt plot
which of the thtee methods of analysis do you think gives the least accurate estimate? Give reasons for your answer [10marks]    1) v against [S] plot 2) lineweaver burk plot 3) computer analysis  more
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11/21/17

The equation Al + CuO to Al2 O3 + Cu=
Al+ CuO Al2O3+Cu =
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11/21/17

Are covalent bonds stronger than ionic bonds
The experimental lattice enthalpy of a compound gets more exothermic than the theoretical lattice enthalpy of the compound if it has more covalent characteristics.This is because theoretical... more
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11/21/17

first order reaction has rate constant 0.0051min-1 if we begen with 0.01 molar conc.of reactants what conc. of reactants will remain in solution after 3 hour
Antilog 0.3986=2.503
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11/20/17

Calculation for buffers
How to calculate amount of sodium acetate and acid acid to produce 500ml 50ppm of fluoride solution
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11/20/17

What amount of Sodium phosphate should have produced
A student produced 109.6 grams of sodium phosphate during neutralization reaction and determined that her percent yeild in the reaction was 64.3%
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11/20/17

State the reaction when zinc sulphide reacts with oxygen to produce sulphur dioxide and zinc oxide
a. Determine the mass of zinc oxide that would be produced if 16.7 gram of zinc sulphide is combined with 6.70 gram of oxygen gas  b. If 7.6 gram are produced determine the percent yeild of... more
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11/20/17

Determine the number of chromium atoms in 46.2 gram of chromium oxide
Formula is Cr2O3
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11/20/17

Assuming the tablet is pure magnesium hydroxide what percentage of tablet is oxygen?
A tablet of TUMS with a mass of 1.2 gram contains magnesium hydroxide(soild).
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11/20/17

calculate either [H3O+] or [OH-] for the solutions below.
1)[OH-] = 1.77 x 10^-7 M [H3O+] = ?M 2)[H3O+] = 8.25 x 10^-9 [OH-] = ?M 3)[H3O+] = 0.000653 M [OH-] = ?M
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11/20/17

steroids hormones uses G protein to actice enzymes within a cell
true or flase
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11/20/17

using chemical equations, show how the triprotic acid H3PO4 ionizes water.
Ka1= Ka2= Ka3=
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11/20/17

complete this equation. LiOH(s) ->
include the state of the product
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11/20/17

the flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. the buret contains 0.310 M NaOH.
1) what volume of NaOH is needed to reach the end point of the titration? 2)what was the initial concentration of HCl?
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11/20/17

a solution contains 0.750 g of Ca2+ in enough water to make a 1875 mL solution
what is the milliequivalent of Ca2+ per liter (mEq/L) for this solution?
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11/20/17

What would most likely happen to pepsin enzymes that traveled with the food from the stomach to the small intestines
10th grade student that goes to high school
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11/19/17

What is the freezing point of a solution with 30 grams of urea and 235 mL of water
Assume th density of water is 1g over ml
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11/19/17

If 15 grains of powder are dissolved in enough water to make one pint of solution, what is the percentage strength?
Please show working
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11/19/17

How many micrograms of neocon are in 50 ml of a 1% ne omycin solution?
Please show working
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11/19/17

1.how many grams of amino acids are in 300ml of a 10% amino acid solution?
Show working please
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