FormulaSodium chlorateHydrobromic acidCHEM 107Problem Set #1 S. S. MassoudAnswer the following questions:Part I: Multiple Choices . Circle the ON E best answer:1. Which of the following is a homogeneous mixture?a) muddy water b) milk c) Italian salad dressingd) melted rocky road ice cream e) White wine2. Which of the following does not represent a chemical change?a) iron rusting b) boiling egg c) digestion of foodd) leaves changing color e) dissolving sugar in water3. How many μg are in 0.0134 g?a) 1.34 x 10-4b) 1.34 x10-6c) 1.34d) 1.34 x 104e) 1.34 x 1064. Convert 184˚ F to degree Celsius.a) 84 b) 274 c) 120 d) 75 e) 665. Perform the indicated operations and give the answer in cm with the proper number of significant figures.a) 104.0 b) 103.95 c) 103.951 d) 104 e) none of these6. Convert 55 miles per hour to meters per second (1 mile = 5280 ft; 1 m = 39.37 in).a) 25 b) 88 c) 2.4 x 10-2 d) 3300 e) 42 7. The mass of 236 mL of the liquid, ethanol is found to be 186 g. What is the density of ethanol ing/mL?a) 1.27 b) 0.789 c) 1.00 d) 788 e) 0.001278. Taken by itself the fact that 8.0 g of oxygen and 1.0 g of hydrogen combine to give 9.00 g of water demonstrates what natural law?a) Conservation of Mass b) Constant Composition c) Periodicityd) The Atomic Theory e) Multiple Proportions9. How many neutrons are in the nucleous of 232Th atom?a) 232 b) 90 c) 81 d) 151 e) 14210. Predict the product of the reaction of strontium, Sr with phosphorous, P.a) Sr3P2 b) Sr2P3c) SrP d) SrP2 e) Sr2P11. An Fe2+ ion contains:a) 28 protons, 28 neutrons and 26 electronsb) 26 protons, 30 neutrons and 24 electronsc) 26 protons, 26 neutrons and 26 electronsd) 58 protons, 58 neutrons and 56 electronse) 54 protons, 56 neutrons and 52 electrons12. Naturally occurring lithium consists of two isotopes Li-6 and Li-7. The atomic mass of Li is approximately 6.9. What are the reasonable estimate of the relative percentages of Li-6 and Li-7, respectively?a) 10, 90 b) 25, 75 c) 50, 50 d) 75, 25 e) 90, 1013. Which of the following would be a metal?a) P c) Se d) Sr d) S e) Si14. Which of the following is molecular?a) Fe2O3b) NaOH c) NF3 d) CuCl2 e) CdS15. Calculate the molar mass of Fe(III) oxide.a) 183.4 b) 159.69 c) 208 d) 71.85 e) 271.39Part II. Calculations:1. Calculate the number of moles of CO present in 125 g sample of the gas.2. Calculate the number of molecules of CO2 present in 44.01 g sample of the gas.3. Calculate the number of atoms in CO2 in the above problem. 4. What is the mass % of As in As2O3?5. Calculate the number of atoms in 21.5 g of potassium.6. How many moles are in 154.5 g of NiCO3?7. How many moles are in 100. g of Arsenic?8. What mass of titanium is equivalent to 5.25 g mols?9. How many grams of Fe2(SO4)3 are in 2.5 moles?10. An unknown compound contains the elements carbon, hydrogen and oxygen. Elementalanalysis shows that the compound is 47.52% carbon, 4.986% hydrogen and 47.49% oxygen.Determine the simplest formula.11. Dibutyl succinate is an insect repellent used against household ants and roaches. Itscomposition is 62.58% C, 9.63% H, and 27.79% O. Its experimentally determined molar masswas found to be 230 g/mol. What are the empirical and molecular formulas of dibutylsuccinate?12. Vitamin C is essential for prevention of scurvy (and large doses may be effective in preventingcolds). Combustion of a 0.2000-g sample of this carbon-hydrogen-oxygen compound yields0.2998 g CO2 and 0.0819 g H2O. What is the empirical formula of vitamin C?13. Naturally occurring europium (Eu) consists of two isotopes. One of the isotopes has a mass of159.960 amu and 48.03% abundance. What is the atomic mass of the other isotope?______________________________________________________________________________ Part III.Complete the table with the formula or name of the compoundName FormulaAmmonium nitrateDinitrogen pentoxideCobalt(III) sulfateK3PO4SF6FeCl3Sodium chlorateAl2O3Ca2N3Hydrobromic acidANSWERSPart I: 1) a 2) e 3) d 4) a 5) ? 6) a7) b 8) a 9) e 10) a 11) b 12) a13) d 14) c 15) bPart II: 1) 4.46 mols CO 2) 6.022 x 1023 molecules CO23) 1.807 x 1024 atoms CO24) % As = 37.975) 3.31 x 1023 atoms K 6) 1.302 mols NiCO37) 1.335 mols As 8) 251 g Ti9) 1000 g Fe2(SO4)310) C4H5O311) EF: C6H11O2 & MF: C12H22O412) C3H4O313) 144.6 amuPart III: 1) NH4NO3 2) N2O53) Co2(SO4)3 4) Potassium phosphate 5) sulfur hexafluoride 6) iron(III) chloride 7) NaClO3 8) aluminum oxide 9) calcium nitride 10) HBr