535 Midterm Skills Review 2024 PDF

Midterm Review-Chem-535 STUDY ALL VOCABULARY THAT HAS BEEN COVERED IN CHAPTERS 1-7. Complete all math problems in pencil. You may use a calculator, periodic table, and metric prefix chart. These will be provided the day of the exam. Note: You will be provided the following reference charts for th...

Midterm Review-Chem-535 STUDY ALL VOCABULARY THAT HAS BEEN COVERED IN CHAPTERS 1-7. Complete all math problems in pencil. You may use a calculator, periodic table, and metric prefix chart. These will be provided the day of the exam. Note: You will be provided the following reference charts for the midterm: Periodic table, element list, metric prefixes, and electron configuration order. 1) Give the number of significant figures for each of the following: Help video a) 1.500m_____________ b) 7.3 x 102 g ____________c) 0.0400s ____________ d) 20000050cm _________ e) 200.L ________ f) 70 tests ____________ 2) Calculate & round the answer to the correct number of significant figures. Specify units. Help a) 22.0m + 5.25m + 1.2m = ___________________________________ b) 89.4cm x 4.8cm = _________________________________________ c) 15m – 10.2m = ___________________________________________ d) (3.40 x 104 m2) ÷ (4.011 x 104 m)= ____________________________ 3) Convert.000861 into scientific notation _____________________ Help 4) Convert 3.431 x 10-3 into standard notation __________________ 5) a) Convert 2500. centimeters into meters. Use a conversion factor and show work. Given: Find: b) Convert 4.30 x 10-6 kiloseconds to nanoseconds. Given: Find: 6) Calculate the density in g/mL of 8.5g of an unknown that occupies a volume of 10.1mL. Show all work. D=M/V 7) Based on the graph showing the density of pennies, label the x and y axis and find the density of the unknown metal with correct units. Round your answer to 2 decimal points. 8) If the actual value of a measurement is 1.70 cm and a student took three measurements of 1.70cm, 2.05cm, and 1.55cm, is the student accurate, precise, both or neither? Give calculations to support your answers. 9) In the lab, Ian calculated the density of a sample of tin to be 6.88g/mL. The known value of the density of tin is 7.31g/mL. Calculate his percent error using the following equation. 10) Tell whether the following are physical (p) or chemical (c) changes: Help video a)evaporating alcohol _____ b) sublimation of carbon dioxide _____ c)rusting iron _____ d) conduction of heat _____ e)mixing green dye into water _____ f) burning a match _____ g)sugar dissolved in water _____ h) sodium reaction with water _____ 11) Fill in the chart with the words “definite” or “variable”. State Shape Volume Solid Liquid Gas 12) Tell whether each of the following is a compound/molecule (C) or element (E). Help a) NaCl ____________ b) H2O ____________ c) 24-k gold____________ d) CO2 ____________ e) CaCl2 ____________ f) CO ____________ g) C6H12O6____________ h) copper ____________ 13) Classify the following as a pure substance (P) or heterogeneous (HT) or homogeneous (HM) mixture. Help a. water ___________ b. salt water ____________ c. sugar water ______________ d. muddy water _____________ e. mud _______________ f. oil and water _____________ g. blood ___________ h. C6H12O6 _____________ i. 14k gold _____________ j. 24k gold ________ k. gasoline ___________ l. paint ____________ m. bromine __________ n. NaCl ____________ o. milk ___________ p. marble __________ q. Windex ____________ 14) Give the length of the beetle to the 14) Give the following 3 measurements to the correct number of decimal places. correct number of decimal places. Include units. Include units. Answer: ______________ Answer: _________ _________ _________ 15. Virus Spread by Mosquitoes Linked to Rare Birth Defect By Laura Sanders Dec 2, 2015 Zika virus, a mosquito-borne virus, which first appeared in Brazil in May, causes fever, rash, vomiting, red eyes and, in some cases, death. Brazilian health officials believe that a Zika infection during pregnancy harms growing fetuses. Pregnant women hit by the virus may be more likely to give birth to babies with the birth defect called microcephaly, a congenital condition marked by a small head and abnormal brain development. Remember: The Independent variable affects the dependent variable. a) What is the independent variable? __________________________ b) What is the dependent variable? __________________________  c) Name 3 other variables that would affect the outcome. 1. 2. 3. 16) Fill in the following chart. Help Name of Isotope Atomic Mass Number Number of Number of Nuclear number Numb of electrons neutrons symbol er protons Aluminum-28 P.Table p+n P.Table. e- = p+ Mass#-p= n 28 atom Al 13 13 28 13 13 28-13p=15n Titanium-46 ion 20 30 65 28 Ca2+ 7 10 8 17)Write the complete electron configuration for phosphorus, P ________________________ 18) Write the noble gas configuration for germanium, Ge: ________________________ 19) Which has a higher electronegativity: nitrogen, oxygen, or fluorine? __________ 20) What is the significance of the octet rule? _______________________________ 21) Which has a higher attraction to a valence electron: nitrogen, oxygen, or fluorine? _________ 22) Which has a higher attraction to a valence electron: fluorine, chlorine, or bromine? ________ 23) Why did you choose the answer to the prior question? 24) Which atom is larger: Mo, Mn, Fe, or Rh? 25) Name the following ionic compounds: a) AlN ___________________________ b) K2O __________________________ 26) Write the formula for the following ionic compounds: a) beryllium phosphide __________________ b) rubidium fluoride _________________