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In a police line-up, the witness is asked to identify one criminal from a group of similar-looking people. If the authorities who conduct the line-up do not know which person is the suspected criminal, and the witness does not know either, then which experimental procedure is a police line-up most like?
a. A single-blind experiment.
b. A double-blind experiment.
c. A non-standard standard scientific experiment.
d. A field experiment.
One mole of monoatomic ideal gas expands adiabatically at initial temperature T against a constant external pressure of 1 atm. from one litre to two litre.
What will be the molarity of the resulting solutions made by mixing 140 mL of 3.2 M H3PO4 with 590 mL H2O?
On a TLC plate if two compounds have Rf values of .50 and .61, how far will they be separated from each other on a plate
If you have a sample of 2.5 mol of Fe2(SO4)3, how many mol of sulfate ion do you have
What Amount of enrgy has been transferred to heat the water? (The specific heat capacity of water is 4.184 J/g *C )
A solution contains 0.25 M Ni(NO3) and 0.25 M Cu(NO3)2. can metal ions be separated by slowly adding Na2CO3? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begin to precipitate,
The concentration of a 300 ML sample of CaCl_2_ solutionis .256M. What is the mass of the solute?
A+B+C =D The rate law for this reaction is Rate=k [A][C] 2/[B]^1/2 Suppose the rate reaction at certain initial concentration of A, B, and C is 1.14*10^-2 M/s.
A certain rifle bullet has a mass of 5.49 g. Calculate the de Broglie wavelength of the bullet traveling at 1697 miles per hour.
The decomposition of hydrogen peroxid is second order in H2O2. If 50 grams of 30% hydrogen peroxide is placed in a beaker within a sealed environment, what will be the concentration of hydrogen peroxide
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 203.00 pm
Draw a lewis dot structure for ketoisophorone to figure out how many non bonding pairs of electrons there are in the molecule.
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