Answer:
C. Electron-negative charge
Explanation:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e⁻
Mass= 9.10938356×10³¹Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P⁺
Symbol of neutron= n⁰
Mass of proton = 1.672623×10⁻²⁷ Kg
Mass of neutron = 1.674929×10⁻²⁷ Kg
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom.
Answer:
0.726 mol·L⁻¹
Step-by-step explanation:
c = moles/litres
=====
Moles = 29.8 × 1/342.30
Moles = 0.087 06 mol
=====
Litres = 120 × 1/1000
Litres = 0.120 L
=====
c = 0.087 06/0.120
c = 0.725 mol·L⁻¹
D would be your best bet because evaporation occurs when water is heated, it then vibrates and then magic!
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Titanium tribromide, titanium (III) bromide, or titanous bromide.
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The vapor pressure of a solvent is a colligative property. That means that it depends on the number of particles of the solvent in solution and not the nature of the solute dissolved.
You have to use Raoult's law, which states that the vapor pressure of a solution is equal to the vapor pressure of the pure solvent times the molar fraction of the solvent, i.e.:
P = P°solv * X solv
X solv = number of moles of solvent / number of moles of solution
solvent = water
solute = glycerin
number of moles of water = mass of water / molar mass of water
number of moles of water = 1000 g / 18.02 g/mol = 55.49 mol
number of moles of glycerine = mass of glycerin / molar mass of glycerin
number of moles of glycerin = 180g / 92.09 g/mol = 1.955 mol
X solv = 55.49 mol / (55.49 mol + 1.955 mol) = 0.966
P = 23.8 torr * 0.966 = 22.99 torr = 23.0 torr
=> Vapor pressure lowering = 23.8 torr - 23.0 torr = 0.8 torr
Answer: 0.8 torr.