Tuesday
December 10, 2013

# Posts by GK

Total # Posts: 644

Chemistry
Polysaccharides and disaccharides must be digested to monosaccharides before being absorbed into the bloodstream.

Chemistry II
The general word is solvation. If the solvent is water, it could be called hydration.

chemistry
I think the question is intended for %H by mass: Using atomic masses and subscripts in C7H8, %H = (100)(8)(1.00794)/[(7)(12.011)(8)+(8)(1.00794)] %H = 8.75% by mass

CHEMISTRY
1. Look up the heat of vaporization of isopropyl alcohol. The figure I found is 44.0 kJ/mole. Divide that by the molar mass to get the kJ/g. Multiply by 1.01g to get the heat absorbed from the aluminum block. 2. The applicable formula for the aluminum is: heat = (specific heat...

chemistry
In a six-carbon chain, there are 5 C-C bonds. When those bonds break during combustion, energy is absorbed, not released. The energy released is due to the formation of C=O bonds in CO2 and H-O bonds in H2O. Calculating the NET energy released must take into account the energy...

Chemistry
Diamond tips are used because they are harder than most materials we would drill into. Diamond is the hardest material, with the possible exception of some forms of boron nitride.

Chemistry
*10 moles of Na2SO4 is 3*10=30 moles of particles. *Convert 0.500 kg H2O to moles. *Total moles = 30 + moles of H2O *Mole fraction of H2O = X(H2O) = (moles H2O) / Total moles. *Look up the vapor pressure of H2O at 30ºC = P(H2O) *Vapor pressure of solution = [X(H2O)]*[P(H...

chemistry
There IS, the cubic meter, m^3. The basic SI units in the "MKS" system are the meter, the kilogram, and the second. Derived units such as those for volume, velocity, force, energy, etc, are "SI" as long as they are based on the basic SI units. Example: The ...

Chemistry
It could a number of things only known to your teacher and/or the author of the printed instructions for the lab. It sounds like an experiment to determine the density of a material. When you measure the mass and the volume of an object, you have the data needed to calculate i...

Chemistry
1. We identify substances from their physical and chemical properties. 2. If we know the density of a substance, we can calculate the mass of a sample from the volume or the volume from the mass. 3. The density of a substance is taken into account in determining how that subst...

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