Cumulative Final Chemistry 121 / Cumulative Exam Chemistry Final Exam 2024 Updated Lately

Electromagnetic radiation with a wavelength of 425 nm appears as violet light to the human eye. The frequency of this light is.... - ANSWER7.06 x 10^14 V=C/Wave (3.00 x 10^8 m/s) / (425 nm) The vertical height of a wave is called... - ANSWERA) wavelength B) amplitude ---- C) frequency D) area E) median The distance between adjacent crests is called... - ANSWERA) wavelength --- B) amplitude C) frequency D) area E) median Which of the following statements is true? - ANSWERA) Part of the Bohr model proposed that electrons in the hydrogen atom are located with random amounts of energy. B) atoms emit excess energy by reducing the energy level of protons in the nucleus. C) moving an atom to an excited state requires electrical energy. D) THE EMISSION SPECTRUM OF A PARTICULAR ELEMENT IS ALWAYS THE SAME AND CAN BE USED TO IDENTIFY THE ELEMENT. ---- Which go the following transitions (in a hydrogen atom) represent emission of the longest wavelength photon? - ANSWERA) n=5 to n=4 ---- B) n=3 to n=5 C)n=1 to n=3 D) n=4 to n=2 E) n=3 to n=1 An ion has 12 protons, 14 neutrons, and 10 electrons. The symbol for the ion is.... - ANSWERA)24 Si 2- B) 26 Ne 2+ C) 26 Mg 2+ ----- D) 24 Si 2+ Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses: X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12% - ANSWERA) 46.84 amu B) 46.27 amu ---- C) 44.99 amu D) 46.34 amu E) 45.91 amu Give the symbol for Magnesium. - ANSWERMg Choose the pure substance from the list. - ANSWERA) Salt Water B) Pomegranate Juice C) Coffee D) CARBON DIOXIDE ---- E) A Casserole Two or more substances in variable proportions, where the composition is constant throughout are: - ANSWERA) A HOMOGENOUS MIXTURE ---- B) A heterogenous mixture C) a compound D) a crystalline solid E) an element Which of the following statements about the phases of matter is true? - ANSWERA) Solids are highly compressible. B) Gaseous substances have long-range repeating order. C) Liquids have a large portion of empty volume between molecules. D) IN BOTH SOLIDS AND LIQUIDS, THE ATOMS OR MOLECULES PACK CLOSELY TO ONE ANOTHER. ---- E) There is only one type of geometric arrangement that the atoms or molecules in any solid can adopt. Isotopes differ in the number of... - ANSWERA) protons and electrons B) electrons C) protons D) gamma particles E) neutrons Water is an example of a.... - ANSWERA) a heterogenous mixture B) an element C) A COMPOUND ---- D) a homogenous mixture An atom that has gained an electron is... - ANSWERA) AN ANION (-) --- B) unlikely to be found in homogenous mixtures C) a cation (+) D) likely to behave exactly like the parent atom E) electrically neutral Molecules can be described as.... - ANSWERA) TWO OR MORE ATOMS CHEMICALLY JOINED TOGETHER --- B) homogenous mixtures C) mixtures of two or more pure substances D) heterogenous mixtures E) mixtures of two or more elements that has a specific ration between components An atom of 32P contains ________ electrons. - ANSWERA) 15 ---- B) 47 C) 17 D) 27 E) 3