09/11/17
Calculate required volume...
Calculate the required volume of Stock 2 (20 mg/mL of ethanol) that you will need to add to each of five volumetric flasks so that when diluted to 100 mL each will yield the desired ethanol...
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09/10/17
Two Elements whose atomic mass order does not match thier atomic number order
Two Elements whose atomic mass order does not match thier atomic number order using periodic table
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09/10/17
drawbacks of spe pipette tips
any tow drawbacks of spe pipette tips
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09/10/17
Chemistry question
If a standard drink is defined as 10 g of alcohol, what volume of 38 % vodka corresponds to 1 standard drink? How many standard drinks are them in 150 mL of 8.8 % Sauvignon Blanc?
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09/10/17
Chemistry question calculation
If you are provided a stock solution of 15 mg/L of ethanol how much of this solution would you need to transfer to a 50 mL volumetric flask to produce a solution of concentration 1 mg/L?
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09/10/17
what would happen if the deoxygenated blood do not come back to heart?
what would happen if the deoxygenated blood do not come back to heart?
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09/09/17
Given that for adenylic acid pK1=3.7, pK2=6.4, and pK3=13.1. A. Calculate the concentration of each species in a 0.100M solution of adenylic acid at pH 9.0
Please include computations
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Where are hydrogen bonds located in nucleic acids and carbohydrates?
I'm having trouble answering the following questions: “where would you find hydrogen bonds in nucleic acids?” “where would you find hydrogen bonds in carbohydrates”?
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Steochemistry
a student started with 0.3295 g of cupper(ii) oxide product was found to be 0.5723 g , and that of filter paper alone was 0.2568 g .calculate the percent yield of cupper(ii)
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09/08/17
GC-MS analysis
What do you need to screen anabolic androgenic steroids in a single GC-MS analysis?
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09/08/17
How to calculate the pH for a solution with [H] positive = 1 x 10 to the negative 4 power. pH = ___
How do you calculate the pH for a solution with [H] positive = 1 x 10 to the negative 4 power. pH = ___________
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09/08/17
Which of the following statements regarding the amino acid glycine is false?
The side chain of glycine is uncharged throughout the pH scale. Only the L isoform of glycine is found in proteins. Its side chain is small enough to allow glycine to fit into tight corners of...
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09/07/17
A solution is prepared by adding 35.00 g of lactose (milk sugar) to 110.0 g of water at The partial pressure of water above the solution is ________ torr.
Vapor pressure at 55 degrees C is 118.0 Torr. The MW of lactose is 342.3 g/mol
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09/07/17
16. An aqueous solution has a normal boiling point of 103.5°C. What is the freezing point of this solution? for water Kb=0.51
For water Kb=0.51 degrees C/m Kf=1.86 degress C/m
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09/07/17
a gallon of paint will 640 square feet of wall space. If I plan to paint a room whose walls measure 2,560 square feet, how many gallons of paint will I need?
How to setup equation and how to solve it step by step
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09/07/17
What is the density of the air?
Air, at sea level pressure and temperature, is such that 1 dm^3(=1000 cm^3) has a mass of 1.3g. what is the density of the air?
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09/06/17
How many grams of alloy which is 25% copper by weight must be mixed with 500 g of alloy which is 12% copper by weight to make a final alloy which is 20% copper
help iv been stuck on this for so long!!!!!!!!!!!!!!!!!!
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09/06/17
A solution is 2.25% by weight NaHCO3. How many grams of NaHCO3 are in 125.0 g of solution? A solution is 2.25% by weight NaHCO3. How many grams of NaHCO3 are in
11.Chemistry
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09/06/17
What is the mole fraction of ethanol in a solution made by dissolving 21.9 g of ethanol, C2H5OH, in 53.6 g of water? What is the mole fraction of ethanol in a s
10.Chemistry
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09/06/17
How much pure acid should be mixed with 4 gallons of a 50% acid solution in order to get an 80% acid solution?
How much pure acid should be mixed with 4 gallons of 50% acid solution in order to get an 80% acid solution?
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09/06/17
How many gallons of a 5% salt solution must be mixed with 60 gallons of a 7% solution to obtain a 6% solution?
How many gallons of a 5% salt solution must be mixed with 60 gallons of a 7% solution to obtain a 6% solution?
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09/06/17
Which neurotransmitter system is most closely associated with mood
Neurotransmitters and mood
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09/06/17
Determine the vapor pressure of an aqueous ethylene glycol (C2H6O2) solution that is 14.8% C2H6O2 by mass. The vapor pressure of pure water at 25 ∘C is 23.8 tor
24.Chemistry
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09/06/17
What mass of glucose should be dissolved in 12.0 of water to obtain a solution with a freezing point of -5.8 ? 6.7 kg 5.3 kg 0.41 kg 4.1 kg
Please help.
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