Is mouthwash an element, a compound, a homogeneous mixture, or a heterogeneous mixture?
2 answers:
Answer: Option (c) is the correct answer.
Explanation:
An element is defined as a substance which cannot be broken down into simpler substances.
For example, potassium is a metal and it contains only atoms of potassium.
A compound is defined as a substance that contains two different elements which are chemically combined together in a fixed ratio by mass.
For example, is a compound in which atoms are present in 1:2 ratio.
A mixture in which particles of one or more number of solutes are evenly distributed into the solvent is known as a homogeneous mixture.
For example, a mouthwash is a homogeneous mixture because it is a clear solution as all the components are evenly distributed.
On the other hand, a heterogeneous mixture is defined as the mixture in which solvent particles are unevenly distributed into the solvent.
For example, mud particles present in water is a heterogeneous mixture.
Thus, we can conclude that mouthwash is a homogeneous mixture.
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Explanation:
For the first part,
Reaction equation:
N₂ + 3H₂ → 2NH₃
Given:
Number of moles of NH₃ = 6 moles
Unknown:
Number of moles of N₂ = ?
Solution:
N₂ + 3H₂ → 2NH₃;
From the reaction above, we solve from the known specie to the unknown. Ensure that the equation is balanced;
2 moles of NH₃ is produced from 1 mole of N₂
6 moles of NH₃ will be produced from mole of N₂
= 3moles of N₂
The number of moles of N₂ is 3 moles
ii.
Given parameters:
Number of moles of sulfur = 2.4moles
Molar mass of sulfur = 32.07g/mol
Unknown:
Mass of sulfur = ?
Solution:
The number of moles of any substance can be found using the expression below;
Number of moles =
Mass of sulfur = number of moles of sulfur x molar mass
Insert the parameters and solve;
Mass of sulfur = 2.4 x 32.07 = 76.97g