Answer : The formal charge on central Cl atom is -1.
Explanation :
The given molecule is,
First we have to determine the total number of valence electrons in,
As we know, chlorine has 7 valence electrons.
Total number of valence electrons in = 3(7) + 1 = 22 electrons
Electrons used in bonding pair = 4
Electrons used as lone pair = 22 - 4 = 18
Now we have to calculate the formal charge on central Cl atom.
- Formal charge = Number of valence electrons of a central atom - (2 × Number of lone pairs) - Number of bond pairs
Formal charge on central Cl atom = 7 - (2 × 3) -2 = -1
Therefore, the formal charge on central Cl atom is -1.
The lewis-dot structure of is shown below.
They all have the same number of protons and electrons but differ in the number of neutrons because they are isotopes.
Answer:
1. Sound is a energy (mechanical)produced by vibrating objects and sound energy is movement of energy through particles.
2.Space occupied by the substance
3.<u>Propagation</u> of <u>Sound Wave</u> and <u>particles of the medium</u>
4.High-Frequency(Ultrasonic wave)
Explanation:
1.Sound is the form of energy which causes sensation of hearing to our ear.It is produce by vibrating objects. When the objects vibrate(to and fro motion) ,they pushes the particles of medium creating the region of high density called compression .When the particles moves backward ,they creates a region of low density called Rarefaction.This pattern repeats indefinitely.
2.Volume is the quantity of three dimensional space occupied by substances like solid,liquid and gases. The SI unit of volume is
In metric system unit of volume is liter
3. Longitudinal Waves: Waves in which displacement of the medium particles are parallel(in the same direction) to the propagation of wave.
Sound wave is longitudinal wave.Hence its particles moves in the same direction as the wave (energy)travel.
4.Frequency: The number of times sound wave passes a given point in one second.Its SI unit is Hertz(Hz).
Frequency of vibration decides the Pitch of the sound waves producing them.
A sound wave of High Pitch means it is oscillating rapidly(at high speed).These are also called Ultrasonic waves. These have frequency more than 20000 Hz. Human being can't hear ultrasonic waves.
Answer with Explanation:
Density of copper(Cu)=
Density of zinc(Zn)=
Atomic mass of copper=
Atomic mass of zinc=65.38 g
We know that
Volume=
Using the formula
Volume of copper=
Volume of zinc=
Volume is inversely proportional to the density.
Pre -1982 penny made by copper and post-1982 penny made by zinc.
Therefore, volume of post-1982 penny is greater than the volume of pre-1982 penny because density of zinc is less than the density of copper.
Answer:
a
Explanation
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