Q- 30. The number of grams of solute
1 answer:
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The volume occupied by 3.66 x atoms of lithium is 7.73
The density of a substance is defined as the mass of the substance per unit volume. It is often denoted by the symbol ρ
The density of a substance is given by,
The mass of a substance is the measure of the amount of matter present in it. It is generally measured in grams (g) or kilograms (kg).
The volume of a substance is defined as the amount of 3D space occupied by it.
<h3>What is Mole Concept?</h3>It is a concept which uses mole as a unit to measure the number of atoms, molecules or ions.
A mole is defined as the amount of substance which has the same number of elementary particles as there are atoms in 12 grams of
1 mole = Avogadro's number = 6.022 x atoms
Molar Mass of Lithium = 6.94 g/mol
1 mole of Lithium has 6.022 x atoms
3.66 x atoms of lithium has molar mass =
Substitute in density formula,
= 7.73
Therefore, 3.66 x atoms of lithium occupies 7.73
of volume.
Learn more about the mole concept:
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Answer:
2s
Explanation:
Given parameters:
Acceleration of the truck = 15m/s²
change in Velocity = 30m/s
Unknown:
Time taken for the body to slow down = ?
Solution:
Acceleration is the rate of change of velocity ;
Acceleration =
time =
Now insert the parameters and solve;
time = = 2s