lOMoAR cPSD| 12504245
lOMoARcPSD |125 0424 5
CHEM 104 FINAL EXAM STUDY GUIDE
Questions and Answers
(Verified Answers)
CHEM 104 FINAL STUDY GUIDE:
1. What is made up of 2 or more atoms in a specific shape:
- Molecules
2. What has matter and distinct properties that doesn’t vary from sample to sample?
- Pure substances
3. Is granulated suger a pure substance?
- Yes
4. Is sea water a pure substance?
- No
5. What is composed of only one kind of atom?
- An element
6. Can elements be decomposed into simpler substances?
- No
7. How many elements are there?
- 118
8. What the most abundant element on earth?
- Oxygen
9. What are the diatomic molecules?
- H2, N2, O2, F2, Cl2
, lOMoAR cPSD| 12504245
10. What is made up of 2 or more elements?
- Compounds
11. States of matter:
- Water vapor
- Liquid water
- Ice
12. Mixtures that are uniform throughout containing 2 or more substances in the
same state:
- Homogenous
13. Mixtures that are uneven; can be separated into 2 or more homo mixtures:
- Heterogeneous
14. Made up of 2 or more substances:
- Mixtures
15. Used to separate homogeneous mixtures:
- Distillation
16. Used to separate heterogeneous mixtures:
- Filtration
17. Describes how a substance can react:
- Chemical properties
18. Used to characterize matters:
- Physical properties
19. Extensive properties:
- Depends on quantity of the sample
, lOMoAR cPSD| 12504245
- Relates to the amount of substance
20. Intensive properties:
- Doesn’t depend on the quantity of sample
21. Si units:
- Length->Meter-> m
- Mass->Kilogram->kg
- Temperature->Kelvin->K
- Amount of substance->Mole->mol
22. Amount of mass in a unit volume:
- Density
23. Formula for density:
- Mass/volume
24. If no temperature is given in a question, what do you assume it to be?
- 25 degrees
25. SI unit of density:
- Kg/m^3
26. Is temperature dependent:
- Density
27. How closely individual measurements agree with the correct value:
- Accuracy
28. How closely individual measurements agree with one another:
- Precision
29. What is the range:
- Highest number subtract the lowest number
30. Accuracy formula:
actual− average
- x 100 %
actual
31. Precision formula:
Range
- x 100 %
average
, lOMoAR cPSD| 12504245
32. Rules of balancing equations:
- Balance elements that occur in the fewest chemical formulas
- Make left equal the right
- Should contain smallest # of coefficients
- never change the chemical formulas
33. Formula weight:
- Take atomic weight and multiply it by # of atoms in compound
- Units are: amu
34. Percentage composition from formulas:
- ( ¿of atoms)(atomic weight )
% element=
formula weight
35. Rules for stoichiometry:
- USE DIMENSIONAL ANALYSIS ALWAYS
- Start off with what your given and convert from there
lOMoARcPSD |125 0424 5
CHEM 104 FINAL EXAM STUDY GUIDE
Questions and Answers
(Verified Answers)
CHEM 104 FINAL STUDY GUIDE:
1. What is made up of 2 or more atoms in a specific shape:
- Molecules
2. What has matter and distinct properties that doesn’t vary from sample to sample?
- Pure substances
3. Is granulated suger a pure substance?
- Yes
4. Is sea water a pure substance?
- No
5. What is composed of only one kind of atom?
- An element
6. Can elements be decomposed into simpler substances?
- No
7. How many elements are there?
- 118
8. What the most abundant element on earth?
- Oxygen
9. What are the diatomic molecules?
- H2, N2, O2, F2, Cl2
, lOMoAR cPSD| 12504245
10. What is made up of 2 or more elements?
- Compounds
11. States of matter:
- Water vapor
- Liquid water
- Ice
12. Mixtures that are uniform throughout containing 2 or more substances in the
same state:
- Homogenous
13. Mixtures that are uneven; can be separated into 2 or more homo mixtures:
- Heterogeneous
14. Made up of 2 or more substances:
- Mixtures
15. Used to separate homogeneous mixtures:
- Distillation
16. Used to separate heterogeneous mixtures:
- Filtration
17. Describes how a substance can react:
- Chemical properties
18. Used to characterize matters:
- Physical properties
19. Extensive properties:
- Depends on quantity of the sample
, lOMoAR cPSD| 12504245
- Relates to the amount of substance
20. Intensive properties:
- Doesn’t depend on the quantity of sample
21. Si units:
- Length->Meter-> m
- Mass->Kilogram->kg
- Temperature->Kelvin->K
- Amount of substance->Mole->mol
22. Amount of mass in a unit volume:
- Density
23. Formula for density:
- Mass/volume
24. If no temperature is given in a question, what do you assume it to be?
- 25 degrees
25. SI unit of density:
- Kg/m^3
26. Is temperature dependent:
- Density
27. How closely individual measurements agree with the correct value:
- Accuracy
28. How closely individual measurements agree with one another:
- Precision
29. What is the range:
- Highest number subtract the lowest number
30. Accuracy formula:
actual− average
- x 100 %
actual
31. Precision formula:
Range
- x 100 %
average
, lOMoAR cPSD| 12504245
32. Rules of balancing equations:
- Balance elements that occur in the fewest chemical formulas
- Make left equal the right
- Should contain smallest # of coefficients
- never change the chemical formulas
33. Formula weight:
- Take atomic weight and multiply it by # of atoms in compound
- Units are: amu
34. Percentage composition from formulas:
- ( ¿of atoms)(atomic weight )
% element=
formula weight
35. Rules for stoichiometry:
- USE DIMENSIONAL ANALYSIS ALWAYS
- Start off with what your given and convert from there
