Cu = 63.546
N= 14.001 g/mol
O= 15.999 g/mol * 3 = 47.997
Copper (II) Nitrate has a MW of 125.544 g/mol
6.25 x 125.544
= 784.65 <--- is your answer, if there were was a multiple choice or not :)
When many atoms share electrons together.
its B. the alpine tundra occurs on mountaintops. just took the test.
Atomic weight of the element = atomic weight of isotope 1 * abundance of isotope 1 + atomic weight of isotope 2 * abundance of isotope 2
Atomic weight of the element = 120.9038 amu * 57.25% + 122.8831 amu * (1 - 57.25%)
Atomic weight of the element = 69.2174255 + 52.53252525 = 121.74995075
=> ~ 121.7500 <--------- answer
Answer:
Molecular weight of nicotine is 162 g/mol
Explanation:
Osmotic pressure (
) for nonelectrolyte is expressed as-

where C is molarity of solution, R is gas constant and T is temperature in Kelvin scale.
If molecular weight of nicotine is W g/mol then number of moles of nicotine present in solution is equal to
moles
So, molarity (C) of solution = 
R is equal to 0.082 L.atm/(mol.K), T is 298 K and
) is 7.55 atm
So, 
or, W = 162
So molecular weight of nicotine is 162 g/mol