semester i review. how many sig-figs are found in each number? 0.345 3005 300 3.002 0.00023

Semester I Review

Semester I Review

How many sig-figs are found in each number?0.34530053003.0020.00023

Semester I Review

Round each number to three sig-figs.456780.00289423.76100.556.799

Semester I Review

Which of the following is a mixture.Pure waterClean air Iron (II) oxideSalt waterCarbon dioxide

Semester I Review

Which of the following is a chemical change.Cutting paperBoiling waterRusting ironBurning gasoline

Symbol Mass # Atomic # Protons Neutrons Electrons

X - ___ 10 15

Y - 35 14

Z - ___ 56 25

Complete the table using the given numbers

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.

Semester I Review

25.0 grams of a given metal displaces 44.2 mL of water; what is the density of the metal?

Semester I Review

What did each scientist contribute to the development of the modern atom.DaltonThomsonRutherfordMilliken

Trial # Measurement True Value = 34.50

1 34.56

2 34.45

3 34.78

Determine if the data below is accurate, precise, both, or neither

Calculate the percent error using the average of the measurements.

Semester I Review

1. The splitting of a nucleus is known as ________.

2. The combining of two small nuclei to form a larger one is known as __________.

3. Give the formula of an alpha particle and beta particle.

Semester I Review

1. Decay of polonium-218 by alpha () emission.

2. Decay of carbon – 14 by beta emission

3. Decay of Thorium - 232 by an electron capture

Semester I Review

1. 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?

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

Semester I Review

Identify each of the letters on the graph and explain what is occurring.

C

D

E

F

G

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?

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

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

Semester I Review

Name the compounds H2SO3

H2S H3PO4

HCN H3P HBr HClO

Semester I Review

Give the formula for the following compounds hydrofluoric acid hydroselenic acid carbonic acid nitrous acid sulfuric acid hydrobromic acid Chlorous acid

Semester I Review

Antimony tribromide Silicon difluoride Tetracarbon octahydride Dinitrogen monoxide Pentaphosphorous decoxide Sulfur hexachloride

Semester I Review

P2O5

SO2

NO2

AsCl3 P4H8

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

Semester I Review