It’s diagram because hydrogen has one proton and you’re not talking about ions so it needs another electron to stable itself
<h3><u>Answer;</u></h3>
Hydrogen bonding causes water to be strongly cohesive.
<h3><u>Explanation;</u></h3>
- The strong hydrogen bonds give water a high cohesiveness and, consequently, surface tension.
- Hydrogen bonding makes ice less dense than liquid water and since ice is less dense than water, it is able to float at the surface of water.
- Water is considered the universal solvent due to its ability to dissolve or dissociate most compounds, a property that results from its polarity, where oxygen has a higher electronegativity than hydrogen.
<span>Answer is 6.66 mol.
<em>Explanation:</em>
According to the
Avogadro's constant, 1 mole of substance has 6.022 × 10²³ particles.
Number of Zinc atoms = </span>4.01 x 10²⁴
Avogadro's constant = 6.022 × 10²³ mol⁻¹
Hence,
moles of Zinc = number of Zinc atoms / Avogadro's constant
= 4.01 x 10²⁴ / 6.022 × 10²³ mol⁻¹
= 6.66 mol
Explanation:
energy: power derived from the utilization of physical or chemical resources
kenetic energy: energy which a body possesses by virtue of being in motion
potential energy: the energy possessed by a body by virtue of its position relative to others
work: forced multiples distance
mechanical energy: energy of an object due to its motion or position; the sum of an objects kenetic energy and potential energy
sound energy: movement of energy through a substance
thermal energy: refers to energy contained within a system that is responsible for its temperature
electric energy: energy (both kinetic and potential) in the changed particles of an atom that can be used to apply force and/or do work
radiant energy: energy that travels by waves or particles
nuclear energy: energy in the nucleus, or core, of an atom
Density of unit cell is mathematically expressed as
D =
where, Z = number of atoms/unit cell = 4 (For FCC structure)
Atomic weight of Cu = 63.5 g
a = edge length = 351 pm = 351 X 10^-10 cm
Avagadro's number = 6.023 X 10^23
∴ Density of unit cell =
= 9.752 g/cm3
Now, for FCC structure a = √8 r
where r = radius of Cu
∴ r = a/√8 = (351 X 10^-10)/√8 = 1.24 X 10^-8 cm = 124 pm
