PAK 6 Concept 1 Review

Presentation

•

Chemistry

•

10th Grade

•

Medium

•

NGSS.HS-PS1-7, TX.112.43.C.8.D., NGSS.HS-PS1-5

Standards-aligned

LEONEL LLANAS

Used 2+ times

FREE Resource

9 Slides • 21 Questions

Multiple Choice

What is Avogadro's number?

The number of protons in an atom

The number of particles in one mole of a substance

The number of electrons in a molecule

The number of atoms in a crystal lattice

Open Ended

Why is the concept of the mole important in chemistry?

Type response here

Multiple Choice

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

NaPO₂

Na₂PO₃

Na₃PO₄

NaPO₄

Fill in the Blanks

To determine a molecular formula, you must first find the molar mass of the

formula.

Multiple Choice

Which of the following is the correct molecular formula for a compound with an empirical formula of CH2 and a molar mass of 42 g/mol?

C2H4

C3H6

C4H8

C6H12

Multiple Choice

Which pair has the same empirical formula?

NaCrO₄ and Na₂Cr₂O₇

C₂H₄O₂ and C₆H₁₂O₆

C₃H₆O₃and C₂H₆O₂

CH₄ and C₂H₆

Multiple Choice

Suppose you find 100 g of an unknown compound that consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

Mg₄N₃

MgN₂

Mg₃N₂

MgN

Multiple Choice

What is the molecular formula for a compound with the empirical formula: K₂SO₄and a molecular mass of 696g.

K₂SO₄

K₈SO₁₆

K₈S₄O₈

K₈S₄O₁₆

Multiple Choice

How many moles of carbon are there in 5g of carbon?

60 mol

17 mol

0.42 mol

7 mol

Multiple Choice

Find the percent composition of N₂S₂.

N: 69.6% S: 30.4%

N:36% S: 75.6%

N: 96.6% S: 3.4%

N: 30.4% S: 69.6%

Multiple Choice

Find the mass in grams of 0.75 moles of magnesium.

32 grams

18 grams

2.21 x 10 ^23 grams

Multiple Choice

Calculate the molar mass of Ba(C₂H₃O₂)₂

255.3 g/mol

237.3 g/mol

228.3 g/mol

196.3 g/mol

Multiple Choice

Abigail, Aria, and Isla are working on a chemistry project. They have found an unknown compound with an Empirical Formula of CF₂. They also determined that the Molecular formula mass of the compound is 192 g/mol. Can you help them figure out the Molecular Formula of the compound?

C₄F₈

C₈F₄

C₃F₆

C₂F₄

Multiple Choice

What is the molecular formula for a compound that contain 36.84g N and 63.16g O?

N₂O₂

NO₂

N₂O₃

Multiple Choice

What is the molar mass of NaOH?

40 g/mol

38.989 g/mol

23.998 g/mol

57.004 g/mol

Multiple Choice

How many molecules are in 2.5 mol of NaCl?

1.51x10²³

146

4.15

1.51x10²⁴

Multiple Choice

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

24 molecules

180 molecules

180 g

6.02 x 10²³molecules

Multiple Choice

How many atoms of carbon are in 6.00g of carbon?

1.20x10²⁴atoms C

6.02x10²³atoms C

3.01x10²³atoms C

1.50x10²³atoms C

Multiple Choice

What is the mass of 0.89 mol of CaCl₂?

111 grams

0.008 grams

98.9 grams

none of the choices

Multiple Choice

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

1 mole = 78.12 g

1 mole = 22.4 L

1 mol = 6.02x 10²³ particles

more than one

Multiple Choice

What is the volume of 2 moles of gas at STP?

22.4 L

44.8 L

11.2 L

2 L

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