4.5 - Introduction to Chemical Formulas
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Practice Questions
Test your understanding with targeted questions
What is the formula for sodium chloride?
💡 Hint: Think of the charges of sodium and chlorine.
How many hydrogen atoms are in a water molecule (H₂O)?
💡 Hint: Look at the subscript after H.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the charge of sodium when it forms an ion?
💡 Hint: Think about how sodium behaves in chemical reactions.
A covalent compound is formed when:
💡 Hint: Remember the sharing aspect of covalent bonds.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Write the formula for potassium phosphate, given potassium has a +1 charge and phosphate (PO₄) has a -3 charge.
💡 Hint: Use the criss-cross method for balancing the charges.
Count the number of atoms in (NH₄)₃PO₄.
💡 Hint: Remember to multiply the ammonium group's components by 3.
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