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.
First, we have the ionic elements. This type of elements involved completely transferring of one ion to another in order to form a bond. There is also the type which forms the covalent bond which involves only sharing of the electrons. Those that exhibits the polar bonds and also the hydrogen bonding.
Answer: A. 11.15
Explanation:
The pH of a solution is given by the formular; pH = -log [H+].
pH = - log [ 7.0 x 10 ∧-12]
= 12 - log 7
= 12 - 0.845
= 11.15
Answer:
Density = 2.137 gram per liter (Approx.)
Explanation:
Given:
Gaseous fuel Butane C4H10
Pressure = 0.897 atm
Temperature = 24°C = 24 + 273 = 297 k
Find:
Density of butane gas
Computation:
We know that molar mass of butane = 58.12 g/mol
Density = [molar mass x pressure] / Rt
Density = [58.12 x 0.897] / [0.0821 x 297]
Density = [52.13] / [24.3837]
Density = 2.137 gram per liter (Approx.)
