The mole concept will most likely be used in
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The mole concept can be used to determine the number of ozone molecules are lost in the atmosphere.
Who introduced mole concept?
The mole concept was introduced by Avogadro. The mole is the SI unit of amount of substance. According to Avogadro, one mole of a substance contains 6.02 × 10^23 atoms, ions, molecules etc. The mole concept is important in many chemical calculations. The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample.
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Answer:
determining how many ozone molecules are lost in the atmosphere
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Also please answer questions properly, and not be rude.
Select one:
a. Those in the third shell from the nucleus.
b. Those in the second shell from the nucleus.
c. Those in the outermost shell.
d. Those in the innermost shell.
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Answer:
Mass, m = 30 grams
Explanation:
It is given that,
Density of an object,
Volume occupies by the silver,
We need to find the mass of a piece of silver. The mathematical formula for the density is given by :
m = 30 grams
So, the mass of the piece of the silver is 30 grams. Hence, this is the required solution.
The density of a Material
The density of a material is defined as the mass per unit volume
it formula is given as
Density = Mass/Volume
and the unit is g/cm^3
Explanation:
Given data
Mass = ???
Volume = 10mL
Density = 3g/ml
Hence the mass is expressed as
Mass= density /Volume
Mass= 3/10
Mass= 0.3g
Therefore the Mass is 0.3g
for more information on density see the link below
helium
B.
hydrogen
C.
lithium
D.
oxygen
E.
zinc
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Answer: option B. Hydrogen
Explanation:
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Answer:
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. Example: Air
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water
Air is a mixture of various gases , dust particles and water vapors which do not react chemically and thus the constituents retain their chemical properties. Water is a compound which is formed by chemical combination of hydrogen and oxygen which lose their individual chemical properties.