Answer:
The liquid collected during distillation when the evaporated substance condenses. A separation technique that uses evaporation to separate substances. The mixture is heated so that one substance evaporates. The vapour is collected and condenses into a liquid.
Thomson's model included Protons and Electrons. His model is referred to as 'Plum Pudding' because of it.
The molarity of solution made by dissolving 15.20g of i2 in 1.33 mol of diethyl ether (CH3CH2)2O is =0.6M
calculation
molarity =moles of solute/ Kg of the solvent
mole of the solute (i2) = mass /molar mass
the molar mass of i2 = 126.9 x2 = 253.8 g/mol
moles is therefore= 15.2 g/253.8 g/mol = 0.06 moles
calculate the Kg of solvent (CH3CH2)2O
mass = moles x molar mass
molar mass of (CH3CH2)2O= 74 g/mol
mass is therefore = 1.33 moles x 74 g/mol = 98.42 grams
in Kg = 98.42 /1000 =0.09842 Kg
molarity is therefore = 0.06/0.09842 = 0.6 M
Answer:
The maximum kinetic energy of electron is = 2.93 ×
Joule
Explanation:
We know that total energy
------------ (1)
Here h = plank's constant = 6.62 ×
J s
c = speed of light = 3 ×
= 261 nm = 261 ×
m
Put all these values in equation (1) we get
E = 7.6 ×
J
We know that
Total energy = Energy to remove an electron + K.E of electron
Energy to remove an electron = 
Energy to remove an electron = 4.67 ×
J
K.E of electron = Total energy - Energy to remove an electron
K.E of electron = 7.6 ×
- 4.67 × 
K.E of electron = 2.93 ×
Joule
Therefore the maximum kinetic energy of electron is = 2.93 ×
Joule
It’s is 130 that is the answer!!!!