Chem 101 test - Study guides, Class notes & Summaries

law of conservation of mass - Answer - in a chemical reaction, matter is neither created nor destroyed theory - Answer - a well-established hypothesis what is the difference between a law and a theory? - Answer - a law summarizes a series of related observations while a theory gives underlying reasons for them quantifiable data - Answer - -objective in nature -measurable -uses equipment qualifiable data - Answer - -subjective in nature -observational -colors, shapes, ect ...

CHEM 101 TEST QUESTIONS AND ANSWERS ALL CORRECT What evidence did you observe that oxygen is not very soluble in water? - Answer-O2 generated pushed water out of the bottle what is the source of oxygen in the procedure you used? - Answer-hydrogen peroxide, H2O2 what purpose does manganese dioxide serve in this preparation of oxygen? - Answer-serves as a catalyst in the preparation of oxygen what gas was in the apparatus before you started generating oxygen? where did it go? - Answer...

CHEM 101 PRACTICE TEST COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (ALREADY GRADED A+) The nucleus of an atom contains: A) Protons and electrons B) Protons and neutrons C) Electrons and neutrons D) Protons, neutrons and electrons E) Electrons only - Answer-B The nucleus of an atom contains protons and neutrons. Which subatomic particle is found in the nucleus and has no charge? A) Electron B) Neutron C) Proton D) Positron - Answer-B Neutrons are subatomic particles found i...

Chem 101 Midterm Ivy Tech Exam Test with Answers 1. Which of the following is considered a hypothesis (as opposed to an observation)? Birds can fly be- cause they have hollow bones 2. Which of the following would be considered a theory? Helium balloons float because heli- um is less dense than air. 3. Which of the statements below is NOT part of the scientific method? All of the a

A service - correct answer 90 Days B service - correct answer 6,000 miles or 6 months C service - correct answer 24,000 miles or 12 months Tank test interval - correct answer 5 years ME-101 - correct answer Daily Equipment report Atmospheric pressure at sea level - correct answer ...

CHEM 101 Lab Exam Questions With All Correct Answers What type of spectrum is emitted by gaseous discharge tubes? - ANSWER- A discontinuous spectrum White light from the sun emits what type of spectrum? - ANSWER- A continuous spectrum from red to violet How are photons emitted in discharge tubes? - ANSWER- As the excited atom returns to a lower energy state, photons are emitted What are 3 common applications of light emission by elements? - ANSWER- 1) The flame test 2) Fireworks 3)...

1. For lower premolars, the purpose of inclining the handpiece lingually is to, A. Avoid buccal pulp horn B. Avoid lingual pulp horn C. Remove unsupported enamel D. Conserve lingual dentine - ANSWER A. Avoid buccal pulp horn Explanation 1- avoid BUCCAL pulp horn 2- conserve ling. dentine So take A and B if available 2. For an amalgam restoration of a weakened cusp you should, A. reduce cusp by 2mm on a flat base for more resistance B. reduce cusp by 2mm following the outli...