Based on the context of paragraph 4, what are salient factors?
2 answers:
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Answer : 6.41 moles of silicon are in the sample.
Solution : Given,
Moles of magnesium = 9.62 moles
The given chemical formula for talc is,
From the given chemical formula we conclude that
The stoichiometry of magnesium and silicon is 3 : 2
3 moles of magnesium is equivalent to 2 moles of silicon
9.62 moles of magnesium will be equivalent to moles of silicon
Therefore, the number of silicon present in sample are 6.41 moles.
<em><u>Given:</u></em>
Weight of Li2CO3 = 154 g
<em><u>To find:</u></em>
number of moles of Lithium Carbonate Li2CO3 = ?
<em><u>Solution:</u></em>
first we have to calculate the molar mass of Lithium Carbonate,
The elemental composition of Li2CO3
Li = 2 units, Atomic weight of each Li atom is 7 g/mol
Li = 2 × 7 = 14 g/mol
C = 1 unit, Atomic weight of Carbon is 12 g/mol
O = 3 units, Atomic weight of each O atom is 16 g/mol
O = 3 × 16 = 48 g/mol
Atomic weight of Li2CO3 = 14+12+48 = 72 g/mol
now,
Number of moles = 154/72 = 2.14 moles
<u>Answer- The number of moles of Lithium Carbonate is 2.14 </u>
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