Answer:
30.7 g of O₂ are produced
Explanation:
This is a redox reaction, where the peroxide is reduced to oxygen and oxidized to hydroxide. The equation is this one:
2Na₂O₂ + 2H₂O → 4NaOH + 3O₂
We assume that water is in excess, so the peroxide is the limiting reagent.
We convert the mass to moles: 50 g . 1mol / 78 g = 0.641 moles
2 moles of peroxide can produce 3 moles of oxygen (according to stoichiometry)
Then, 0.641 moles of peroxide will produce (0.641 . 3 ) /2 = 0.961 moles O₂
Finally, we convert the moles to mass: 0.961mol . 32 g / 1mol = 30.7 g of O₂
The answer is C2H2 because an alkyne compound consists of a series of unsaturated hydrocarbons with a triple bond.
Yes yes you are totally right
Answer:
The atom is divisible particle and can be subdivided into smaller particles proton, neutron and electrons was not stated by John dalton.
Explanation:
The postulate of Dalton's atomic theory that atom is indivisible particle and can not be subdivided into smaller particles was later changed because atom can be divided into neutrons, protons and electrons.
Electron:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e⁻
Mass= 9.10938356×10⁻³¹ Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
Proton and neutron:
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
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron.
They are gases at room temperature
Hope this helps:)
