8.1 ✨Reactions and Equations

8.1 ✨Reactions and Equations

11th Grade

6 Qs

quiz-placeholder

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8.1 ✨Reactions and Equations

8.1 ✨Reactions and Equations

Assessment

Quiz

Science

11th Grade

Medium

NGSS
HS-PS1-7

Standards-aligned

Created by

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