Questions and Answers
What does the 2 mean in the formula $5Mg_3(PO_4)_2$?
What is the chemical formula for the molecule modeled?
C6H12O2
What mistake did Carl make when determining the number of atoms in the formula $4Ca(ClO_3)_2$?
He did not multiply the chlorine and oxygen atoms by the coefficient 4.
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.
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In what way is Model B better than Model A?
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In what way is Model A better than Model B?
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Which of these is a compound?
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Study Notes
Magnesium Phosphate
- Chemical formula: Mg3(PO4)2
- Contains magnesium and phosphate ions
- Phosphate (PO4) acts as a charged particle
- The subscript '2' indicates two phosphate ions per molecule
Chemical Modeling
- Example molecule formula: C6H12O2
- Various methods exist to model compounds
Common Mistake in Chemical Calculations
- Issue in interpreting 4Ca(ClO3)2:
- Chlorine and oxygen atoms must be multiplied by the coefficient '4'
- Incorrect counting leads to errors in atom tally
Pure Substances
- A compound is classified as a pure substance
- Cannot be separated into simpler substances using physical means
Comparison of Molecular Models
- Model B advantage:
- Clearly shows connections between atoms in the molecule
- Model A advantage:
- Represents the three-dimensional shape of the molecule
Identification of Compounds
- Example of a compound: CO2
- Distinguishing between compounds and other substances is important in chemistry
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Test your knowledge of chemical compounds with these flashcards. Learn about the structure and formulas of compounds such as magnesium phosphate. Perfect for students preparing for chemistry exams.
