Physical Science A Mod 5

Physical Science A Mod 5

9th Grade

38 Qs

quiz-placeholder

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Physical Science A Mod 5

Physical Science A Mod 5

Assessment

Quiz

Science

9th Grade

Hard

NGSS
MS-PS1-5, MS-PS1-2, MS-PS1-1

+5

Standards-aligned

Created by

Sharla Burgess

FREE Resource

38 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the compound 3Ca₃(PO₄)₂, how many atoms of oxygen are there?

4

8

16

24

Answer explanation

In 3Ca₃(PO₄)₂, there are 2 phosphate (PO₄) groups. Each phosphate has 4 oxygen atoms, totaling 8 oxygen atoms per formula unit. With 3 formula units, the total is 3 x 8 = 24 oxygen atoms.

Tags

NGSS.MS-PS1-1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is the correct count of atoms for the compound Al₂(SO₄)₃?

Al=1, S=2, O=6

Al=2, S=3, O=12

Al=2, S=1, O=4

Al=3, S=2, O=6

Answer explanation

In Al₂(SO₄)₃, there are 2 aluminum (Al), 3 sulfur (S), and 12 oxygen (O) atoms. The sulfate ion (SO₄) has 4 oxygen atoms, and with 3 sulfate ions, it totals 12 oxygen atoms. Thus, the correct count is Al=2, S=3, O=12.

Tags

NGSS.MS-PS1-1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of Sn (Tin)?

39.10 g/mol

207.2 g/mol

118.71 g/mol

78.96 g/mol

Answer explanation

The molar mass of Tin (Sn) is 207.2 g/mol, which is the correct choice among the options provided. This value is based on the atomic weight of Tin found on the periodic table.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the numerical value of Avogadro's number?

1.23 x 10²³

3.14 x 10²³

6.022 x 10²³

9.81 x 10²³

Answer explanation

Avogadro's number, which is the number of particles in one mole of a substance, is defined as 6.022 x 10²³. This value is fundamental in chemistry for converting between moles and number of atoms or molecules.

Tags

NGSS.HS-PS1-7

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of reaction is represented by the equation 2 HgO → 2 Hg + O₂?

Synthesis

Single-Replacement

Double-Replacement

Decomposition

Answer explanation

The reaction 2 HgO → 2 Hg + O₂ involves the breakdown of mercury(II) oxide into mercury and oxygen. This is characteristic of a decomposition reaction, where a single compound breaks down into two or more products.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to the law of conservation of mass, if 8 grams of CH₄ react completely with 32 grams of O₂, how many grams of products are formed?

40 grams

32 grams

24 grams

16 grams

Answer explanation

According to the law of conservation of mass, the total mass of reactants equals the total mass of products. Here, 8 grams of CH₄ and 32 grams of O₂ react to form 40 grams of products (8g + 32g = 40g).

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Balance the following equation: Fe₂O₃ + H₂ → Fe + H₂O

Fe₂O₃ + 6 H₂ → 2 Fe + 6 H₂O

Fe₂O₃ + 3 H₂ → 2 Fe + 3 H₂O

2 Fe₂O₃ + 6 H₂ → 4 Fe + 3 H₂O

2 Fe₂O₃ + 6 H₂ → 4 Fe + 6 H₂O

Answer explanation

To balance the equation, we need 3 H₂ for every Fe₂O₃ to produce 2 Fe and 3 H₂O. Thus, the balanced equation is Fe₂O₃ + 3 H₂ → 2 Fe + 3 H₂O, making this the correct choice.

Tags

NGSS.MS-PS1-5

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