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Calculate the number of photons emitted in one second by a 6 W laser operating at a wavelength of 438.0 nm
What mass of sucrose should be combined with 455 g of water to make a solution with an osmotic pressure of 8.75 atm at 320 K?
3.64 g of calcium hydroxide react with excess sodium sulfate in aqueous solution to produce solid sulfate and aqueous sodium hydroxide. How many moles of calcium atoms are reacting ?
Calculate the number of grams of Fe formed when 0.100 kg Fe2O3 of reacts.
A lead fishing weight with a mass of 68 g absorbs 146 cal of heat. If its initial temperature is 56°C, what is its final temperature.
The size of a diamond is measured in carats. (1 carat=.200 g) The density is 3.51 g/cm3. How many carats is a diamond that measures .
How much heat is required to raise the temperature of 7.50 grams of water from 10 degrees celcius to 55 degrees celcius
Predict whether, to any significant extent, MnO-4(aq) will oxidize Cl-(aq) to Cl2(aq) in acidic solution, The reaction is spontaneous under standard conditions
Consider the titration of a 24.0 ml sample of 0.120 M HC2H3O2 with 0.105 M NaOH. Determine the initial pH.
Calculate the wavelength of light that is produced when the excited electron relaxes back tro ground state. givien sodium is the excited element
Draw a separation scheme for isopentyl acetate from its reactants (isopentyl alcohol, glacial acetic acid, and concentrated sulfuric acid)
Lead metal is added to 0.100M Cr3+(aq), Pb(s) + 2Cr3+(aq) -> Pb2+(aq) + Cr2+(aq)
Let us assume that we are working with a vesicle created from a biological membrane and wish to determine whether the various proteins are integral or peripheral and exposed to which side of the membrane
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