What is the 17th element on the periodic table?
2 answers:
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Phosphorus can be prepared from calcium phosphate by the following reaction:
Phosphorite is a mineral that contains plus other non-phosphorus-containing compounds. What is the maximum amount of
that can be produced from 2.3 kg of phosphorite if the phorphorite sample is 75%
by mass? Assume an excess of the other reactants.
Answer: Thus the maximum amount of that can be produced is 0.345 kg
Explanation:
Given mass of phosphorite = 2.3 kg
As given percentage of phosphorite is =
According to stoichiometry:
2 moles of phosphorite gives = 1 mole of
Thus 5.56 moles of phosphorite give= of
Mass of
Thus the maximum amount of that can be produced is 0.345 kg
The empirical formula of the compound : Cu₂O
<h3>Further explanation</h3>Given
66.41 g Cu
8.56 g O
Required
The empirical formula
Solution
1. Find mol
- Cu(Ar 63.5 g/mol)
mol = mass : Ar
mol = 66.41 : 63.5
mol = 1.046
- O(Ar=16 g/mol)
mol = 8.56 : 16
mol = 0.535
2. mol ratio
Cu : O (divide by smallest mol⇒0.535) :