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A 195mg sample of a non-electrolyte isolated from throat lozenges was dissolved in enough water to make 10.0mL of solution at 25 degrees Celsius. The osmotic pressure of the resulting solution was 4
A proton is released from rest inside a region of constant, uniform electric field E1 pointing due North. 27.3 seconds after it is released, What is the ratio of the magnitude of E2 to the magnitude
Benzoyl peroxide, the substance most widely used against acne, has a half-life of 9.8 103 days when refrigerated. How long will it take to lose 7% of it potency (93% remaining)
An electric dipole with dipole moment P=(3.24 i + 4.30 j)(1.56 x 10^-30 C*m) is in an electric field E=(4055 N/C) i, What is the potential energy of the electric dipole
An equilibrium mixture at 225 degrees contains 0.14M NH3 and0.19 M H2 for the reaction of 3H2+N2=2. If the Kc at this temp is 1.0*102, what is the equilibrium concentration of N2
predict the products of the reaction of acetophenone with 1) NaBH4 then H3O+ 2)aqueous acidic CrO3 3)NH2OH 4)CH3MgBr, then H3O+ 5) CH3OH, H+ catalyst
Consider the glass prism in the figure below, for which ? = 22° and ? = 68°. What is the smallest angle ?1 for which a laser beam will undergo total internal reflection
predit the products of the reactions of phenylacetaldehyde,c6h5ch2cho,with the following reagents: 1) NaBH4 then H3O+ 2)aqueous acidic CrO3 3)NH2OH 4)CH3MgBr, then H3O+ 5) CH3OH, H+ catalyst
A lamp which is 12.0 cm tall is 264.0 cm in front of a converging lens which has a focal length of 80.0 cm, What is the image distance for this lamp and lens combination
There were many different reactions to Darwin s evolutionary theory, but two that were very different are those of Andrew Carnegie and Peter Kropotkin.
A long line carrying a uniform linear charge density +56.0 µC/m runs parallel to and 10 cm from the surface of a large, Find the location of all points on a line perpendicular to the sheet and t
Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.
Compare the major points of the Constitution of the United States with those of the Communist Manifesto. How are the Western ideals interpreted differently in these two contexts?
Explain how each religion (Hinduism and Buddhism) is practiced today. Provide one (1) specific example of how each is practiced. and Identify at least two (2) ways in which each religion is practiced
The Henry's Law constant for CH3Br gas in water at 25 oC is 0.159 mol/L-atm. Calculate the solubility of CH3Br in water at 25 oC in moles/L if the partial pressure of CH3Br in the headspace above a
Calculate the number of moles of ions present in 66.8 g of a solution that is 2.11% Fe(NO3)3 by mass.
A 0.9 inch tall clock is 29 cm in front of a diverging lens which has a focal length of -30 cm, Determine the image distance and height
A particular fish tank filled with fresh water (n = 1.33) has a coral reef sticker stuck to an exterior wall, What is the index of refraction of the tank's walls
Platinum(II) forms many complexes, amond them those with the following ligands. Give the formula and charge of the complex with two ammonia molecules and one oxolate ion(C2O4^2-).
Calculate the vapor pressure of water, in torr, above a solution prepared by dissolving 65.40 g of ZnCl2 in 445.0 g of water at 323.0 K. The vapor pressure of pure water at 323.0 K is 92.50 torr.
The electric field in an xy plane produced by a positively charged particle is 4.94(6.9i + 4.4j)N/C at the point (5.9, 5.8) cm, Determine the x and y coordinates of the particle
What is the osmotic pressure, in atm, of a solution formed by dissolving 17.8 g of PbCl4 in 0.250 L of water at 64.4 oC? (R = 0.0821 L-atm/mol-K; 0 oC = 273 K)
A research-level Van de Graaff generator has a 1.9-m-diameter metal sphere with a charge of 4.9 mC on it, What is the potential near its surface in MV
The statements in the following multiple choices deal with various aspects of the relationship between vapor pressure and intermolecular forces.