Chemistry
1 mole = 6.02x10^23 A bromine molecule has the formula Br2. Multiply the number of Br2 molecules by 2 to get the number of atoms of bromine. Divide the number of atoms by 6.02x10^23 atoms/mole to get moles of Br atoms
chemistry
A sodium carbonate, Na2CO3, solution would neutralize ethanoic acid forming sodium acetate in the aqueous layer. A calcium chloride solution, CaCl2, would mix with the ethanol in the aqueous layer. Most of the ester would be in a separate layer on top of the water layer. The l...
chemistry
Here an outline of the solution. The answers to the answers in each step should have at least four significant figure. 1. Convert the grams of CO2 and H2O to moles 2. Moles of carbon, C, equals the number of moles of CO2. Convert the moles of C to grams of C. 3. Moles of hydro...
Chemistry
mass = density x density or M = DV Applying this to water, 36.84g = (0.9970g/mL)(V) For chloroform, 41.43g = (x)(V) Dividing the left sides and right sides, we get: 41.43g / 36.84g = (0.9970g/mL) / x (the equal volumes cancel out) Solve the above proportion for x
college biology
A sample containing starch will cause an iodine solution to turn dark blue. A sample containing fats will leave a greasy stain on paper. Simple sugars can be tested with Benedict or with Fehling solutions. The blue color of the test solution will change from yellow to red. Pro...
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...
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