Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Density, Avagadro's Numbers, Molar Mass and the Mass Percentage | CHEM 1301, Study notes of Chemistry

Material Type: Notes; Class: FUNDAMENTAL CHEMISTRY; Subject: Chemistry; University: University of Central Arkansas; Term: Unknown 1989;

Typology: Study notes

Pre 2010

Uploaded on 08/16/2009

koofers-user-eyw
koofers-user-eyw 🇺🇸

3

(1)

10 documents

1 / 6

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
1.Density mass volume
2. Avogadros Number moles number of things
3. Molar mass moles mass
4. Stoichiometry moles X moles Y
5. Mass percent mass X mass Y
This is a list of the most common relationships used throughout general
chemistry calculations. You must know which ideas are related for each and
how to use them as conversion factors.
pf3
pf4
pf5

Partial preview of the text

Download Density, Avagadro's Numbers, Molar Mass and the Mass Percentage | CHEM 1301 and more Study notes Chemistry in PDF only on Docsity!

1. Density mass volume

2. Avogadro’s Number moles number of things

3. Molar mass moles mass

4. Stoichiometry moles X moles Y

5. Mass percent mass X mass Y

This is a list of the most common relationships used throughout general chemistry calculations. You must know which ideas are related for each and how to use them as conversion factors.

1. Density mass volume

• convert from mass to volume Skillbuilder 2.15, p 35

• convert from volume to mass Skillbuilder Plus, p 35

• calculate density directly Skillbuilder 2.14, p 34

246 cm^3 7.93 g = 1950 g (then to kg) 1 cm^3

0.035 g 1 cm^3 = 0.044 cm^3 (0.035 g = 35 mg) 0.788 g

density = mass = 9.67 g = 21.4 g/cm^3 volume 0.452 cm^3 Looks like genuine Pt compared to p 33.

3. Molar mass moles mass

• convert from moles to mass Skillbuilder 6.2, p 158

2.78 mol S 32.07 g = 89.2 g sulfur 1 mol S

• convert from mass to moles Skillbuilder 6.4, p 160

1.18 g NO 2 1 mol NO 2 = 0.0256 mol NO 2 46.01 g NO 2

4. Stoichiometry moles X

• using a compound formula Skillbuilder 6.6, p 163

1.4 mol H 2 SO 4 4 mol O = 5.6 mol O 1 mol H 2 SO 4

moles Y

• using a balanced reaction Skillbuilder 8.1, p 236

24.6 mol O 2 2 mol H 2 O = 49.2 mol H 2 O 1 mol O 2

(^1) O 2 (g) + 2H 2 (g) à 2 H 2 O(g)