1. Semester I Review

2. Semester I Review How many sig-figs are found in each number? 0.345
3005
300
3.002

3. Semester I Review Round each number to three sig-figs. 45678 0.002894
23.76
100.5
56.799

4. Semester I Review Which of the following is a mixture. Pure water
Clean air
Iron (II) oxide
Salt water
Carbon dioxide

5. Semester I Review Which of the following is a chemical change.
Cutting paper
Boiling water
Rusting iron
Burning gasoline

6. Complete the table using the given numbers
Symbol
Mass #
Atomic #
Protons
Neutrons
Electrons
X - ___ 10 15
Y - 35 14
Z - ___ 56 25

7. Semester I Review
Calculate the average atomic mass given the following data: element Y has three isotopes 35.0% = 23.5 amu, 55.0% = 25.0 amu and 10.0% = 26.0 amu.

8. Semester I Review
25.0 grams of a given metal displaces 44.2 mL of water; what is the density of the metal?

9. Semester I Review
What did each scientist contribute to the development of the modern atom.
Dalton
Thomson
Rutherford
Milliken

10. Determine if the data below is accurate, precise, both, or neither
Trial #
Measurement
True Value = 34.50 1
34.56 2
34.45 3
34.78
Calculate the percent error using the average of the measurements.

11. Semester I Review The splitting of a nucleus is known as ________.
The combining of two small nuclei to form a larger one is known as __________.
Give the formula of an alpha particle and beta particle.

12. Semester I Review Decay of polonium-218 by alpha () emission.
Decay of carbon – 14 by beta emission
Decay of Thorium by an electron capture

13. Semester I Review
The half-life of phosphorous-30 is 2.5 min. If you start with 55 g of phosphorus-30, how many grams would remain after 27.5 min?

14. Semester I Review
Calculate the specific heat of an unknown metal, given that 25.0g of the metal lost 3570 J of energy during a temperature change from 100.0oC to 25.0oC

15. Semester I Review
Identify each of the letters on the graph and explain what is occurring. C D E F G

16. Semester I Review
Label the solid, liquid, and gas regions on the graph.
Label the triple point and critical point
At 600oC and 90 atm, what phase is yummygum in?

17. Semester I Review Give the formula for the following compounds
1) iron (II) arsenide
2) lead (II) sulfate
3) lead (IV) hydroxide
4) copper (II) acetate
5) beryllium chloride
6) ammonium chromate
7) silver oxide
8) potassium sulfide

18. Semester I Review Give the name of the following compounds 1) NaBr
2) Sc(OH)3
3) V2(SO4)3
4) NH4F
5) CaCO3
6) NiPO4
7) Li2SO3
8) Zn3P2
9) Sr(C2H3O2)2
10) Cu2O

19. Semester I Review
Name the compounds
H2SO3
H2S
H3PO4
HCN
H3P
HBr
HClO

20. Semester I Review Give the formula for the following compounds
hydrofluoric acid
hydroselenic acid
carbonic acid
nitrous acid
sulfuric acid
hydrobromic acid
Chlorous acid

21. Semester I Review Antimony tribromide Silicon difluoride
Tetracarbon octahydride
Dinitrogen monoxide
Pentaphosphorous decoxide
Sulfur hexachloride

22. Semester I Review
P2O5
SO2
NO2
AsCl3
P4H8

23. Semester I Review Balance and classify the reactions
____ C8H18 + ____ O2  ____ CO2 + ____ H2O
____ FeCl3 + ____ NaOH  ____ Fe(OH)3 + ____NaCl
____ P + ____O2  ____P2O5
____ Na + ____ H2O  ____ NaOH + ____H2
____ Ag2O  ____ Ag + ____O2
____ S8 + ____O2  ____ SO3