Answer:
option a = Atoms are always in motion.
Explanation:
John Dalton gives atomic theory in 1808. The main postulates are following,
1 = All mater is composed of indivisible particle called atom.
2 =The atoms of same element are identical, but differ from another element.
3 = The atoms of different elements are combine in fixed proportion and form compound.
4 = Atom can not be created nor destroyed.
5 = Atom is smallest part of an element that take part in chemical reaction.
From above Dalton theory postulates it can be seen that all options are correct except option A.
Answer:
Paper
Explanation:
In chromatographic separation, two different phases are important; a stationary phase and a mobile phase.
The stationary phase is the phase that does not move. Substances are separated based on how fast or slowly they move in the stationary phase.
The mobile phase is usually the solvent(or mixture of solvents) that carries the solutes through the stationary phase.
The stationary phase is usually composed of a porous material. Paper is a porous material. The mobile phase is trapped between the cellulose fibers of the paper and separation is achieved.
Answer:
sediments consist of rocks and minerals, as well as the remains of plants and animals
Explanation:
The structure is in the attached photo. I’ve drawn the compound and it’s skeletal compound but they are of the same molecule.
The total pressure of the flask is sum of partial pressures of the gases present in a mixture of gas
This is Dalton's law of partial pressures .'
say we have a mixture of "n" gases with respective pressure : P1, P2 ...Pn
total pressure of the gases = P1 +P2 + P3 + ...Pn = Ptotal
So in the given problem the total pressure of flask will be = 0.72+1.65 = 2.37 atm
