BChem 1st Semester Practice Final

Flashcard
•
Chemistry
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the correct order of the scientific method steps?
Back
Ask a question, research, state your hypothesis, experiment, analyze, make a conclusion.
2.
FLASHCARD QUESTION
Front
How many protons does Lead-209 (Pb-209) have?
Back
82 protons.
3.
FLASHCARD QUESTION
Front
Who developed the atomic theory?
Back
John Dalton.
4.
FLASHCARD QUESTION
Front
What is the formula to calculate density?
Back
Density = Mass / Volume.
5.
FLASHCARD QUESTION
Front
If a block of aluminum has a mass of 40.5 g and occupies a volume of 15 cm³, what is its density?
Back
2.7 g/mL.
6.
FLASHCARD QUESTION
Front
How many significant figures are in the number 0.00204?
Back
3 significant figures.
7.
FLASHCARD QUESTION
Front
What is a hypothesis in scientific research?
Back
A hypothesis is a testable prediction about the relationship between variables.
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