Balancing Chemical Equations
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the little number after an element in a chemical equation called?
Back
Subscript
2.
FLASHCARD QUESTION
Front
How many HCl molecules do you need to balance the equation: Mg + ___ HCl → MgCl2 + H2?
Back
2
3.
FLASHCARD QUESTION
Front
Balance the following equation: ___ H2 + ___ O2 → ___ H2O
Back
2, 1, 2
4.
FLASHCARD QUESTION
Front
In the equation, 2Mg + O2 → 2MgO, which are the reactants?
Back
Mg and O
5.
FLASHCARD QUESTION
Front
Balance the following equation: ___ Mg + ___ O2 → ___ MgO
Back
2, 1, 2
6.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A number placed in front of a compound to indicate how many molecules are present.
7.
FLASHCARD QUESTION
Front
What does it mean to balance a chemical equation?
Back
To ensure that the number of atoms of each element is the same on both sides of the equation.
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