Balancing equations

Flashcard
•
Science
•
7th Grade
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What does the Law of Conservation of Mass state?
Back
Matter cannot be gained or lost in a chemical reaction.
Tags
NGSS.MS-PS1-5
2.
FLASHCARD QUESTION
Front
Is the equation 2Na + 2H2O → 2NaOH + H2 balanced?
Back
Yes
Tags
NGSS.MS-PS1-5
3.
FLASHCARD QUESTION
Front
Fill in the blanks with coefficients: PCl5 + _ H2O → _ HCl + H3PO4
Back
4, 5
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
4.
FLASHCARD QUESTION
Front
Which equation is balanced? PbO2 + 2H2, SO2 + H2O → H2SO4, or 2Na + 2H2O → 2NaOH + H2?
Back
2Na + 2H2O → 2NaOH + H2
Tags
NGSS.MS-PS1-5
5.
FLASHCARD QUESTION
Front
Balance this equation: _Al + _HCl → _H2 + _AlCl3
Back
2, 6, 3, 2
Tags
NGSS.MS-PS1-5
6.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A coefficient is a number placed in front of a chemical formula to indicate how many molecules or atoms are involved in the reaction.
Tags
NGSS.MS-PS1-5
7.
FLASHCARD QUESTION
Front
What is a balanced equation?
Back
A balanced equation has the same number of each type of atom on both sides of the equation.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
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