She dissolves a 10.0mg sample in enough water to make 30.0ml of solution. the osmotic pressure of the solution is 0.340torr at 25c. a). what is the molar mass of the gene fragment? b). if the solution density is 0.997g/ml, what is the freezing point for this aqueous solution?

(a)The molar mass of the gene fragment is 18220.071g/mol = 18.22 kg/mol

(b)The freezing point for the aqueous solution is C

Explanation:

The osmotic pressure (π) is given by the following equation:

= Concentration of solution

R = universal gas constant = 62.364

T = temperature

Weight of solute = w = 10.0 mg

Let the molecular weight of the solute be m g/mol.

Concentration =

m = 18220.071g/mol

Therefore, the molar mass of the gene fragment is 18220.071g/mol = 18.22 kg/mol

m is the molality of the solution.

m = mol/kg

= C

The freezing point for the aqueous solution is C

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

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(jacemorris04)

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.