When a non volatile solute is added to a solvent, the vapor pressure of the solvent will decrease.
Vapor pressure is a colligative property. Which means that it will be affected by the number of particles of solute.
The relationship between the concentration of the solute and the vapor pressure is given by Roult's Law
ΔP = Xsolute * P, where ΔP is vapor pressure lowering, Xsolute is the molar fractionof the solute, and P is the vapor pressure of the solvent.
Then lets find Xsolute
X solute = # moles solute / # moles solution
# moles solute = 75.0 grams / molar mass
molar mass of C12H22O11 = 12*12g/mol + 22*1g/mol + 11*16g/mol = 342 g/mol
# moles solute = 75.0/342 mol = 0.219 mol
# moles of solvent = grams of solvent / molar mass of solvent
# moles of solvent = 180 grams /18 g/mol = 10 mols
Xsolute = 0.219 mol solute / (10 + 0.219) mol solution =0.0215
ΔP = 0.0215*26.7 torr = 0.57 torr
Answer= 0.57 torr
Answer:
Explanation:Use the Gizmo to mix 200 g of copper at 100 °C with 1,000 g of water at 20 °C. Record the data and calculated answers for copper in the 2 tables below. Accepted values for % error calculations can be found below these 2 tables.
DATA
Copper
Lead
Mass of Metal
The answer is 84.00661 grams
Explanation:
Scientist Evidence Model
Dalton Gases indivisible, solid and spheres
J.J Thomson Deflected beam Negative charges evenly scattered
through positively charged mass of
matter.
Rutherford Deflection of alpha atomic model
particles passing
through the gold foil
The emboldened words are the answer.
- John Dalton proposed the first model of the atoms by his works on gases. He postulated the Dalton's law of partial pressure.
- He suggested that gases are made of tiny particles called atoms.
- J.J Thomson proposed the plum pudding model of the atom in which the charges are evenly scattered through the positively charged mass of matter.
- The gold foil experiment by Rutherford brought the atomic model of the atoms in the front-light.
- The model suggests a small positively charged center which the mass of the atom.
- The outer space is occupied by the electrons.
Learn more:
Rutherford brainly.com/question/1859083
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Forming oxygen by bubbling fluorine through water.
