A biomedical engineer is working in a lab that is isolating gene fragments. 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. What is the molar mass of the gene fragment

The molar mass of the gene fragment is 5466021.2 g/mol

Explanation:

To calculate the molar mass of solute, we use the equation for osmotic pressure, which is:

Or,

where,  

= osmotic pressure of the solution = 0.340 torr

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute = 10.0 mg = 0.010 g    (Conversion factor:  1 g = 1000 mg)

Volume of solution = 30.0 mL

R = Gas constant =

T = temperature of the solution =

Putting values in above equation, we get:

Hence, the molar mass of the gene fragment is 5466021.2 g/mol

yes it is balanced

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.