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the freezing point of a CaCl2 solution is -25 degrees C. a) what is the molality(m) of the CaCl2 solution? b) what is the boiling point of the CaCl2 solution
You're convinced the opera is almost over because of the large women singing a loud vibrato, What is the power coming from her voice? All of the sudden 4 more identically loud women come out of nowher
the following amino acids are placed in an electric field between positive and negative poles. which will migrate the fastest toward the positive end of the electric field
Sound is coming through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window in one hour
A small rope has a linear mass density of 8.00 g/m and is tied to two vertical walls that are separated by three fourths the length of the rope, Find an expression for the speed of a wave on the rop
protonated means that the drug is in its acid form (HA) and dissociated means that the drug is in its dissociated form (A-). the pH of the stomach is about 1 or 2. the pH of the blood is about 7.4.
A 40.0 kg girl and a 8.4 kg sled are on on ice (frection coefficient 0.01) of a frozen lake, draw free body diagrama for the girl and the sled
how many liters of NO gas can be produced at STP from 80.0 mL of a 4.00 M HNO3 solution and 10.0 g of Cu? 3Cu(s) + 8HNO3(aq) > 3Cu(NO3)2(aq) + 4H2O(l) + 2NO(g)
A solution contains 4.56 g of KCl in 175 mL of solution. if the density of the KCl solution is 1.12 g/mL, what are the mass percent (m/m) and moarity (M) for the KCl solution
The electric field on the x-axis due to a point charge fixed at the origin is given by E=(b/x^2)i, Find the magnitude and sign of the point charge
you want a solution that will buffer the addition of either 10 micro moles of acid or 10 micro moles of base. total buffer concentration is equal to the concentration of the acid plus the concentrat
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, find the mass of the receiver
A particle of charge +14 µC and mass 3.54 10-5 kg is released from rest in a region where there is a constant electric field of +490 N/C
The potential difference across a coil is 11V at an instant when the current through the coil is decreasing at a rate of 38A/s . What is the coil's inductance
in a patient with insulin-dpendent diabetes mellitus who forgot to administer insulin, you would expect to see all of the following after a high sugar meal except
H--C(triplebond)C--H Acetylene. The overall rate law for the polymerization is first order with respect to both acetylene and the catalyst used for the reaction. What, therefore, is the slowest step
The bicarbonate buffering system is one of the major pH regulating mechanisms in your blood. which of the following is not a compound formed in th transport of carbon dioxide via this buffering syst
what is the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. write none if no insoluble salt forms. a)AgNo3(aq) + Na2SO4(aq). b)KCl(
what is the final volume in mL when 5.00 mL of a 12.0 M NaOH solution is diluted to each of the following concentrations a).600 M NaOH. b)1.00 M NaOH. c)2.50 M NaOH.
calculate the molarity (M) of the solution when water is added to prepare each of the following: a)25.0 mL of a 18.0 M HCl solution is diuted to 500 mL. b)50.0 mL of a 1.50 M NaCl solution is dilute
The Balmer series in atomic hydrogen is the series of wavelengths emitted by the electron when it makes a transition from an energy level with n > 2 to the n = 2 level, Find the four largest wave
A 1.00-mol sample of an ideal monatomic gas is compressed isothermally and irreversibly in one step from 2.50 atm to 6.50 atm at 300.0 K. Calculate G for this process
Consider a simple cubic crystal structure with a cube edge a= 3.5x10^-10 m and suppose it is used to scatter 3.10x^-10 m x-rays, Find the Bragg angle theta
A proton having an initial velocity of 18.1i hat bold Mm/s enters a uniform magnetic field of magnitude 0.300 T with a direction perpendicular to the proton's velocity, Determine the distance the pr
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.64 m, Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a