Previous AnswerNO Convert 543.7 L to kL Previous Answer- 0.5437 kL Convert 0.000348 into scientific notation Previous Answer- 3.48 x 10-4 How many significant figures does 0.056090 have? Previous Answer5 Convert 85.6°F to K (hint – convert to Celsius first) Previous Answer- 302.9 K What is the equivalent of 5 6.72x10 ? Previous Answer672,000 A chemist measures the mass of a chunk of wood to be 97.2g. When the wood is burned, 32.0g of carbon dioxide, 21.0g of ash and 31.5 g of water vapor are produced. How many grams of oxygen were used in the burning? Previous Answer12.7 g What is the frequency of green light (495nm)? (hint- first convert 495nm to m) Previous Answer6.06x1014Hz Which of these two molecules is covalent? SO3 or KNO3 Previous AnswerSO3 What is the chemical formula for disulfur trioxide? Previous AnswerS2O3 What is the chemical name of NO2? (hint this compound is covalent) Previous AnswerNitrogen Dioxide What is the chemical name of KCl? Previous AnswerPotassium Chloride 90Y has ______protons _____neutrons _____electrons Previous Answer39, 51, 39 What is the full electron configuration of Cu? Previous Answer1s22s22p63s23p64s23d9 What element has the following electron configuration? 1s22s22p63s23p64s23d94p65s24d105p2 Previous AnswerTin (Sn) What is the abbreviated electron configuration of As? Previous Answer[Ar]4s23d104p3 What is the chemical formula for magnesium nitrate? Previous AnswerMg(NO3)2 What is the name of NH4CN? Previous AnswerAmmonium Cyanide What is the chemical formula for ammonium oxide? Previous Answer(NH4)2O Determine the shape and bond angle of CF4? (make sure you know how to draw these molecules, and know how many bonded and lone pairs there are) Previous AnswerTetrahedral, 109 Determine the shape and bond angle of H2O? (make sure you know how to draw these molecules, and know how many bonded and lone pairs there are) Previous AnswerBent, 105 Determine the shape and bond angle of PBr3? (make sure you know how to draw these molecules, and know how many bonded and lone pairs there are) Previous AnswerPyramidal, 107 What type of change alters the chemical bonds of a compound? Previous AnswerChemical Change Ice is an example of what kind of change? Previous AnswerPhysical Change Most solids sink in their liquid form, but ice floats in water. Why? Previous AnswerHydrogen bonding A miner finds a silver-colored nugget with a volume of 25mL and a mass of 262.5g. Is the nugget silver? (The density of silver is 10.5g/mL) Previous AnswerYes Is Sodium a homonuclear diatomic molecule?