What is the empirical formula for a compound containing 36.95 g of mercury (Hg) and 13.05 g of chlorine (Cl)?
Hydrates/Empirical Formula Practice

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Chemistry
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
HgCl₂
2.
FLASHCARD QUESTION
Front
Name the hydrate represented by NaCl * 5H₂O.
Back
sodium chloride pentahydrate
3.
FLASHCARD QUESTION
Front
What is an empirical formula?
Back
The simplest whole-number ratio of moles of elements in the compound.
4.
FLASHCARD QUESTION
Front
What is Na₂CO₃ · 10H₂O known as?
Back
sodium sulfate decahydrate
5.
FLASHCARD QUESTION
Front
What is the name of the ionic compound BeCl₂?
Back
beryllium chloride
6.
FLASHCARD QUESTION
Front
Define a hydrate.
Back
A compound that contains water molecules within its structure.
7.
FLASHCARD QUESTION
Front
What is the formula for calculating the number of moles?
Back
Number of moles = mass (g) / molar mass (g/mol).
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