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Semester I Review

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**Semester I Review How many sig-figs are found in each number? 0.345**

3005 300 3.002

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**Semester I Review Round each number to three sig-figs. 45678 0.002894**

23.76 100.5 56.799

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**Semester I Review Which of the following is a mixture. Pure water**

Clean air Iron (II) oxide Salt water Carbon dioxide

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**Semester I Review Which of the following is a chemical change.**

Cutting paper Boiling water Rusting iron Burning gasoline

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**Complete the table using the given numbers**

Symbol Mass # Atomic # Protons Neutrons Electrons X - ___ 10 15 Y - 35 14 Z - ___ 56 25

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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.

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

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

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**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.

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**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.

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**Semester I Review Decay of polonium-218 by alpha () emission.**

Decay of carbon – 14 by beta emission Decay of Thorium by an electron capture

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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?

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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

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

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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?

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**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

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**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

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

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**Semester I Review Give the formula for the following compounds**

hydrofluoric acid hydroselenic acid carbonic acid nitrous acid sulfuric acid hydrobromic acid Chlorous acid

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**Semester I Review Antimony tribromide Silicon difluoride**

Tetracarbon octahydride Dinitrogen monoxide Pentaphosphorous decoxide Sulfur hexachloride

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Semester I Review P2O5 SO2 NO2 AsCl3 P4H8

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**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

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