8.1 ✨Reactions and Equations

Quiz
•
Science
•
11th Grade
•
Medium
Standards-aligned
Gabbriel Stivers
Used 1+ times
FREE Resource
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A balanced chemical equation is a direct presentation of the __________.
law of conservation of mass
law of definite proportions
law of multiple proportions
law of constant composition
Tags
NGSS.HS-PS1-7
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a chemical equation, the number written in front of the chemical formula is the __.
coefficient
subscript
exponent
molar mass
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Balance the following equation. What is the coefficient for hydrogen fluoride? SiO₂ + HF ➔ SiF₄ + H₂O.
4
2
3
5
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is the correct word equation for the reaction: Cu(s) + O₂(g) ➔ CuO(s)?
Copper(s) + Oxygen(g) ➔ Copper(II) Oxide(s)
Copper(s) + Oxygen(g) ➔ Copper Oxide(s)
Copper(s) + Oxygen(g) ➔ Copper(I) Oxide(s)
Copper(s) + Oxygen(g) ➔ Copper Dioxide(s)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to reduce coefficients in a balanced equation to the lowest-possible whole-number ratio?
To make the equation easier to read
To clearly indicate the relative amounts of substances in a reaction
To ensure the equation is balanced
To simplify calculations
Tags
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the balanced chemical equation for the reaction between aqueous phosphoric acid and aqueous calcium hydroxide to form solid calcium phosphate and water?
2H₃PO₄(aq) + 3Ca(OH)₂(aq) ➔ Ca₃(PO₄)₂(s) + 6H₂O(aq)
H₃PO₄(aq) + Ca(OH)₂(aq) ➔ Ca₃(PO₄)₂(s) + H₂O(aq)
3H₃PO₄(aq) + 2Ca(OH)₂(aq) ➔ 2Ca₃(PO₄)₂(s) + 3H₂O(aq)
2H₃PO₄(aq) + Ca(OH)₂(aq) ➔ Ca₃(PO₄)₂(s) + 2H₂O(aq)
Tags
NGSS.HS-PS1-7
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