A covalent bond where electrons are shared unequally is known as a polar bond. This unequal sharing occurs due to differences in electronegativity between the two atoms involved in the bond.
A covalent bond in which electrons are shared unequally is defined as a polar bond. This corresponds to option a) polar. This occurs because one atom is more electronegative and pulls the shared electron pair towards its nucleus making the bond polar, having a partial positive and partial negative end. Option b) a double bond, refers to a covalent bond where two pairs of electrons are shared between atoms. Option c) ionic refers to a bond where electrons are completely transferred from one atom to another and option d) polyatomic refers to a molecule that consists of more than two atoms.
#SPJ6
Boyle's law deals with pressure and volume.
Robert Boyle studied the relationship between the pressure p and the volume V of a confined gas held at a constant temperature.
Boyle observed that the product of the pressure and volume are observed to be nearly constant.
The product of pressure and volume is exactly a constant for an ideal gas.
PV = constant
As per Boyle’s law, any change in the volume occupied by a gas (at constant quantity and temperature) will result in a change in the pressure exerted by it. In other words, the product of the initial pressure and the initial volume of a gas is equal to the product of its final pressure and final volume (at constant temperature and number of moles).
Therefore, Boyle's law deals with pressure and volume.
Learn more about Boyle's law, here:
#SPJ3
76 In the space in your answer booklet, draw a Lewis electron-dot diagram for the compound that tarnishes silver. [1]
77 In the ground state, an atom of which noble gas has the same electron configuration as the sulfide ion in Ag2S? [1]
Silver tarnishes due to the chemical reaction with hydrogen sulfide, forming silver sulfide. A Lewis dot structure for H2S shows sulfur at the center bonded to two hydrogen atoms. The sulfide ion in Ag2S has the same electron configuration as the noble gas neon.
The chemical compound that tarnishes silver is hydrogen sulfide, H2S. In terms of Lewis electron dot structures, hydrogen sulfide, H2S, would be modelled as an S atom at the center surrounded by two H atoms. Each H atom is bonded to the S atom by a shared pair of electrons, represented by a single line. In the sulfide ion S2- (which is a part of Ag2S), there are additional 2 electrons to the sulfur atom, making a total of 8 valence electrons, which is the same electron configuration as the noble gas neon.
Learn more about Chemical Reaction here:
#SPJ6
The compound that tarnishes silver is silver sulfide (Ag2S), and its Lewis electron-dot diagram can be drawn by representing the valence electrons. The sulfide ion in Ag2S has the same electron configuration as the noble gas argon (Ar).
A Lewis electron-dot diagram is a representation of the valence electrons in an atom or a compound. The compound that tarnishes silver is silver sulfide (Ag2S). The Lewis electron-dot diagram for Ag2S can be drawn by representing the valence electrons of each element.
The sulfide ion in Ag2S has the same electron configuration as the noble gas argon (Ar). This means that the electron configuration of the sulfide ion is 1s2 2s2 2p6 3s2 3p6.
#SPJ6
Given:
64.82 g of aluminum metal
100.0oC is cooled to 82.0 °C
specific heat of aluminum is 0.897 J /g °C.
Required:
Change in heat energy
Solution:
This can be solved through the equation H = mCpT where H is the heat, m is the mass, Cp is the specific heat and T is the change in temperature.
The specific heat of the water is 4.18 J/g-K
Plugging in the values into the equation
H = mCpT
H = (64.82) (0.897 J /g °C) (82 – 100)
H = -1,046.6 J
its atomic weight
its atomic formula
its atomic structure
Answer: Option (b) is the correct answer.
Explanation:
Atomic weight is also known as atomic mass or molar mass of an atom.
Atomic mass means the sum of total number of protons and neutrons present in an atom.
For example, atomic mass of HCl is atomic mass of hydrogen + atomic mass of chlorine.
That is, atomic mass of HCl is 1.01 g/mol + 35.453 g/mol = 36.463 g/mol
Thus, we can conclude that molar mass of any element is always equal to its atomic weight.