conservation of mass and balancing chemical equations Flashcards
1
Q
What does the law of conservation of mass state?
A
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.
2
Q
True or False: In a balanced chemical equation, the number of atoms of each element is the same on both sides of the equation.
A
True
3
Q
Fill in the blank: In a chemical equation, the substances that undergo change are called _____ and the substances formed are called _____ .
A
reactants; products
4
Q
What is the first step in balancing a chemical equation?
A
Identify the number of atoms of each element on both sides of the equation.
5
Q
Which of the following compounds is correctly balanced? A) H2 + O2 → H2O B) 2H2 + O2 → 2H2O C) H2 + O2 → 2H2O
A
B) 2H2 + O2 → 2H2O
