Answer: Lead chloride solution is A SUBSTANCE.
In chemistry, all matters are divided into mixtures and pure substances. The pure substances are made up of one type of particle while the mixtures are made up of different particles. The pure substances can be in form of an element or a compound. Lead chloride for instance is a compound and is a pure substance.
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CuSO4. 5H2O(s) → CuSO4(s) + 5 H2O(g)
Here, when we heat copper (II) sulphate pentahydrate, it will turn white in colour from blue colour.
To be able to solve this problem, we must be given the
balanced chemical equation:
3A + 5B + 1C ---> 2D + 1E
Our reactant A is called the limiting reactant because it
is limited in amount which is only 6 moles. So we based our calculation on that
reactant alone.
From stoichiometry, we have 1 mole of E for every 3 moles
of A, therefore:
moles E = 6 moles A * (1 mole E / 3 moles A)
moles E = 2 moles
The statement that is not a characteristic of science is: science is not testable.
