Answer:
162.2 g/mol
Explanation:
Molar mass is defined as the mass in 1 mole of the substance. It is calculated by adding the molar mass of the substituents each multiplied by the subscript they have in the formula.
Thus, To calculate molar mass of nicotine having formula, 
Molar mass of C = 12.0107 g/mol
Molar mass of H = 1.00784 g/mol
Molar mass of N = 14.0067 g/mol
Thus, molar mass of nicotine =
= 162.2 g/mol
Answer:
B.
Explanation:
There are the same amount of black circles in the reactant and product. There are also the same amount of white circles in the product and reactant.
Answer:
Image result for How do solute concentrations affect the rate of osmosis within the cell?
Concentration gradient - The movement of osmosis is affected by the concentration gradient; the lower the concentration of the solute within a solvent, the faster osmosis will occur in that solvent.
I think this is it^^^
Explanation: