What is the chemical formula for water?
Chemistry Semester Exam

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Science
•
11th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
H₂O
2.
FLASHCARD QUESTION
Front
What is an example of a chemical change?
Back
Browning meat
3.
FLASHCARD QUESTION
Front
What are the smallest particles into which an element may be broken down without changing the identity of the element?
Back
Atoms
4.
FLASHCARD QUESTION
Front
What isotope is the atomic mass unit defined relative to?
Back
Carbon-12
5.
FLASHCARD QUESTION
Front
What is Avogadro’s number?
Back
The number of particles in one mole of a substance, approximately 6.022 x 10²³.
6.
FLASHCARD QUESTION
Front
What is the definition of a chemical reaction?
Back
A process that leads to the transformation of one set of chemical substances to another.
7.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.
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