Since hydrogen bonding is a stronger intermolecular force than van der Waals forces, more energy is required to separate the molecules of ethanol than the molecules of ethane. Thus ethanol has a higher melting point than ethane.
Answer:
The effect is the increasing of the molar concentration.
Explanation:
When you standarize a solution of NaOH with KHP you are establish its molar concentration (That is the amount of moles of NaOH per liter of solution).
If you evaporated some water of the solution, you are increasing its concentration because volume is decreasing doing the amount of moles per liter increasing.
Answer:
Gram molecular mass = 40 + (35.5)2 = 111g
Mass of 
in 1 mole = 111g
Mass of in 0.15 mole = 111 × 0.15 = 16.65 g
Copper is current voltage above 40 or 200 . copper useful for motor and some medicine
