Calculate the vant hofffactor for na2so4
The freezing point depression constant for water is -1.86 ?C/m. If 5.00 g Na2SO4 is dissolved in 45.0 g H2O,the freezing point is changed by -3.82 ?C. Calculate the van't Hofffactor for Na2SO4.
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Calculate the pH after 0.120 g ofsolid NaOH is added to 150 mL of this buffer solution.c. If the acceptable buffer range of the buffer solution is ±0.10 pH units, calculate how many moles of H3O+ can be neutralized by 250 mL of the b
A 17.0 kg child on a 3.00 m long swing is released from rest when the ropes of the swing make an angle of 26.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest position.
A model of a submarine, 1 : 15 scale, is to be tested at 195 ft/s in a wind tunnel with standard sea-level air, while the prototype will be operated in seawater.
Tarzan swings on a 33.0 m long vine initially inclined at an angle of 39.0° with the vertical. (a) What is his speed at the bottom of the swing if he starts from rest?
A mixture of NaCl and sucrose (C12H22O11) of combined mass10.2g is dissolved in enough water to make up a 250ml solution. The osmotic pressure of the solution of the solution is 7.32 atm at250C. Calculate the mass percent of NaCl in the solution.
The water velocity at a certain point along a 1 : 16 scale model of a dam spillway is 3 m/s. What is the corresponding prototype velocity if the model and prototype operate in accordance with Froude number similarity?
What is the rate constant for the first order decay of acertain radioactive isotope if the concentration drops from 0.50Mto 0.050 M in 1.0 years?
If the model tests are to be performed in a wind tunnel using standard air, what is the required air velocity in the wind tunnel?
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