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A solution of 4.00 g hemoglobin in 100 mL was prepared and its osmotic pressure was measured. The osmotic pressure was found to be 0.0130 atm at 280 K.
(a) Estimate the molar mass of hemoglobin.
(b) If 4.00 g of NaCl is dissolved in 100 mL of water, what would the osmotic pressure be?
Molecular weights of some proteins: ferricytochrome c 12 744; myoglobin 16 951; lysozyme 14 314; immunoglobulin G 156 000; myosin 570 000
A gymnast of mass 60kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
One gallon of paint (volume = 3.78 x 10-3 m3) covers an area of 26.0 m2. What is the thickness of the fresh paint on the wall
A geologist finds an unidentified fossilized rock in a box in the attic. What kind of dating would the scientist use to decide the age of the rock?
How deep, would you have to be below the rock surface to detect only a 10% change in temperature compared to the surface during the day? State your answers both in metres and in terms of a multiple of the skin depth.
On a clear night a laser rotated at an angular velocity of 1 radian s-1 produces a spot of light that is visible on Jupiter, 600 x 106 km distant. How fast does the spot of light move across Jupiter? Does this violate the theory of relativity? Exp..
An object is dropped from rest at a height of 124 m. Find the distance it falls during its final second in the air
Two small, positively charged spheres have a combined charge of 5.02×10-5 C. what is the charge on the sphere with the smaller charge
The plates of a parallel plate capacitor are separated byd = 1.0 cm. The potential of the negative plate is 0 V,and the potential halfway between the plates is +15 V (see thedrawing). What is the electric field between the plates (take theupward d..
A pair of narrow, parallel slits separated by 0.240 mm is illuminated by the green component from a mercury vapor lamp (λ = 546.1 nm). The interference pattern is observed on a screen 1.24 m from the plane of the parallel slits.
A small airplane needs to reach a speed of 280 km/h to take off. (a). What is the minimum length of a runway in m that can allow the plane to takeoff if it accelerates at the rate of 3.80 m/s2? (b) How much time does the plane take to reach that s..
The root-mean-square speed at 299K is 483 m/s. What is its average translational kinetic energy at that speed
Suppose a block of mass M is sliding down an inclined plane which makes an angle t with the horizontal. What is the work done by friction as the block travels a distance d along the plane
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