Presentation is loading. Please wait.

Presentation is loading. Please wait.

Semester I Review ANSWERS. Semester I Review How many sig-figs are found in each number? 0.3453 30054 3001 3.0024 0.000232.

Similar presentations


Presentation on theme: "Semester I Review ANSWERS. Semester I Review How many sig-figs are found in each number? 0.3453 30054 3001 3.0024 0.000232."— Presentation transcript:

1 Semester I Review ANSWERS

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

3 Semester I Review Round each number to three sig-figs

4 Semester I Review Which of the following is a mixture. Pure watercompound Clean airhomogenous mixture Iron (II) oxide compound Salt waterhomogenous mixture Carbon dioxide compound

5 Semester I Review Which of the following is a chemical change. Cutting paperphysical Boiling waterphysical Rusting ironchemical Burning gasolinechemical

6 SymbolMass #Atomic #ProtonsNeutronsElectrons X - _25__ Y Z - _56__ Complete the table using the given numbers

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. (35x23.5) + (55x25.0) + (10x26.0) =

8 Semester I Review 25.0 grams of a given metal displaces 44.2 mL of water; what is the density of the metal? 25.0g/44.2mL = 0.566g/mL

9 Semester I Review What did each scientist contribute to the development of the modern atom. Dalton = proof of the atom Thomson = cathode rays are electrons Rutherford = dense positive nucleus, electrons outside nucleus, atom mostly empty space Milliken = mass to charge ratio of the electron

10 Trial #MeasurementTrue Value = Accurate and precise Determine if the data below is accurate, precise, both, or neither Calculate the percent error using the average of the measurements. (34.60 – 34.50) x100 = % 34.50

11 Semester I Review 1. The splitting of a nucleus is known as ___fission _____. 2. The combining of two small nuclei to form a larger one is known as ____Fusion______. 3. Give the formula of an alpha particle and beta particle.

12 Semester I Review 1. Decay of polonium-218 by alpha ( ) emission Decay of carbon – 14 by beta emission Decay of Thorium by an electron capture 5. +

13 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? Mfinal = (55g)(.5) 11 = 0.027g

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 o C to 25.0 o C c = 3570J / (25.0g)x(75.0 o C) c = 1.90 J/g o C

15 Semester I Review Identify each of the letters on the graph and explain what is occurring. C = solid warming/cooling D = Phase change solid to liquid or vice versa E = liquid warming/cooling F = phase change liquid to gas or vice versa G = gas warming/cooling 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 600 o C and 90 atm, what phase is yummygum in? Label the solid, liquid, and gas regions on the graph. Label the triple point and critical point At 600 o C and 90 atm, what phase is yummygum in? liquid solid liquid gas Triple point Critical point

17 Give the formula for the following compounds 1)iron (II) arsenideFe 3 As 2 2)lead (II) sulfatePbSO 4 3)lead (IV) hydroxidePb(OH) 4 4)copper (II) acetateCu(C 2 H 3 O 2 ) 2 5)beryllium chlorideBeCl 2 6)ammonium chromate(NH 4 ) 2 CrO 4 7)silver oxideAg 2 O 8)potassium sulfide K 2 S Semester I Review

18 Give the name of the following compounds 1)NaBrSodium Bromide 2)Sc(OH) 3 Scandium (III) Hydroxide 3)V 2 (SO 4 ) 3 Vanadium (III) Sulfate 4)NH 4 FAmmonium Fluoride 5)CaCO 3 Calcium Carbonate 6)NiPO 4 Nickel (III) Phosphate 7)Li 2 SO 3 Lithium Sulfite 8)Zn 3 P 2 Zinc Phosphide 9)Sr(C 2 H 3 O 2 ) 2 Strontium Acetate 10)Cu 2 OCopper (I) Oxide Semester I Review

19 Name the compounds H 2 SO 3 Sulfurous Acid H 2 SHydrosulfuric acid H 3 PO 4 Phosphoric acid HCNHydrocyanic acid H 3 PHydrophosphoric acid HBrHydrobromic acid HClOHypochlorous acid Semester I Review

20 Give the formula for the following compounds hydrofluoric acidHF hydroselenic acidH 2 Se carbonic acidH 2 CO 3 nitrous acidHNO 2 sulfuric acidH 2 SO 4 hydrobromic acidHBr Chlorous acidHClO 2 Semester I Review

21 Antimony tribromideSbBr 3 Silicon difluorideSiF 2 Tetracarbon octahydrideC 4 H 8 Dinitrogen monoxideN 2 O Pentaphosphorous decoxideP 5 O 10 Sulfur hexachloride SF 6 Semester I Review

22 P 2 O 5 Diphosphorous pentoxide SO 2 Sulfur dioxide NO 2 Nitrogen dioxide AsCl 3 Arsenic trichloride P 4 H 8 Tetraphosphorous octahydride Semester I Review

23 Balance and classify the reactions _2_ C 8 H 18 + _25_ O 2 _16_ CO 2 + _18_ H 2 O ____ FeCl 3 + _3__ NaOH ____ Fe(OH) 3 + _3__NaCl _4__ P + __5_O 2 _2__P 2 O 5 _2__ Na + _2__ H 2 O __2_ NaOH + ____H 2 _2__ Ag 2 O _4__ Ag + ____O 2 ____ S 8 + _12_ O 2 _8__ SO 3 Semester I Review


Download ppt "Semester I Review ANSWERS. Semester I Review How many sig-figs are found in each number? 0.3453 30054 3001 3.0024 0.000232."

Similar presentations


Ads by Google