What is the chemical formula for oxygen difluoride?
Honors Chem Semester Review (Ch 1-5)

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Chemistry
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10th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
OF₂
2.
FLASHCARD QUESTION
Front
Convert 25 g of As₂Pe₃ to moles. (Peeyew is a fictional element found on the dwarf planet Pluto)
Back
0.0993 moles
3.
FLASHCARD QUESTION
Front
Calculate ΔH in kJ/mol for the reaction: N₂(g) + O₂(g) → 2 NO(g) when 0.35 mols of N₂ reacts, absorbing 63.21 kJ of heat.
Back
+ 180.6 kJ
4.
FLASHCARD QUESTION
Front
What is the empirical formula (simplest whole number ratio) for a compound with 82.2% N and 17.8% H?
Back
NH₃
5.
FLASHCARD QUESTION
Front
What is the net ionic equation for the reaction: CaCl₂ + 2 AgNO₃ → Ca(NO₃)₂ + 2 AgCl?
Back
Ag⁺ + Cl⁻ → AgCl
6.
FLASHCARD QUESTION
Front
Define empirical formula.
Back
The empirical formula is the simplest whole number ratio of elements in a compound.
7.
FLASHCARD QUESTION
Front
What is the difference between molecular formula and empirical formula?
Back
The molecular formula shows the actual number of atoms of each element in a molecule, while the empirical formula shows the simplest ratio of the elements.
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