Knowledge Quiz #3 (TEKS 8.6E)
This quiz will help you understand how mass is conserved in chemical reactions and how the rearrangement of atoms in chemical equations demonstrates this principle. Some questions will focus on the process of photosynthesis as an example. Select the best answer for each question.
Question 1
Which statement best describes the law of conservation of mass?
Question 2
What happens to atoms during a chemical reaction?
Question 3
How many oxygen atoms are on the reactant side of the chemical equation at photosynthesis?
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Question 4
Which compound contains 6 atoms of Oxygen?
Question 5
If you start with 10 grams of reactants in a chemical reaction, what should be the total mass of the products?
Question 6
How many oxygen atoms are in the chemical formula for calcium phosphate, Ca3(PO4)2?
Question 7
According to the Law of Conservation of Mass, what should be the mass of the missing reactant?
_______ g + 16g —> 20g + 5g
Question 8
Which of the following best explains why a burning candle in a closed jar does not lose mass?
Question 9
In the chemical equation 2H₂ + O₂ → 2H₂O, how many hydrogen atoms are present on the product side?
Question 10
The chemical formula Na2CO3 represents Sodium Carbonate. Which of the following statements accurately describes the atoms involved in sodium carbonate?
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