Answer:
molar mass is
Explanation:
Osmotic pressure is related with concentration as follows:
Where, C is concentration or molarity , R is gas constant and T is temperature.
Osmostic pressure given is 0.0766 atm
R is
T = 25 + 273 = 298 K
Rearrange the above equation to calculate concetration of the solution as follows:
C = P/RT
molarity = moles/volume in L
moles = molarity × volume in L
volume = 5.00 mL = 0.005 L
moles = 0.00313 × 0.005
=
Therefore, molecular mass of protein is
Answer : The correct option is A: 20 km/h, B: 10 km/h
Explanation :
Speed : It is defined as the distance traveled per unit time.
Formula used:
where,
S = speed
d = distance
t = time
First we have to calculate the speed of vehicle A.
Given:
Distance of vehicle A = 50 km
Time of vehicle A = 2.5 hr
Now putting all the given values in the above formula, we get:
Now we have to calculate the speed of vehicle B.
Given:
Distance of vehicle B = 50 km
Time of vehicle B = 5 hr
Now putting all the given values in the above formula, we get:
Therefore, the speed of vehicle A and B is 20 km/hr and 10 km/hr respectively.
Answer: 15.2 grams
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
where,
n= moles of solute
= volume of solution in ml
moles of solute (nickel (II) chloride hexahydrate ) =
Putting the values , we get
Thus 15.2 grams of nickel (II) chloride hexahydrate are required to prepare 250. mL of aqueous solution whose concentration is 0.255 M.
Answer:
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