Chem 111 - Study guides, Class notes & Summaries

CHEM 111 Final Exam 53 Questions with Verified Answers Know your significant figure rules - CORRECT ANSWER ALL zeroes between non-zero numbers are ALWAYS significant. ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant. ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant. define calorimetry - CORRECT ANSWER the act of measuring heat required or evolved during ...

CHEM 111 Exam 1|100 Questions with Verified Answers Qualitative Observations - CORRECT ANSWER Descriptive in nature Ex-Changes in color and physical state Quantitative Observations - CORRECT ANSWER Measurements Numerical values obtained from instrumentation, glassware, and other measuring devices Varying precision and accuracy Scalar or dimensional unit - CORRECT ANSWER SI units based on the metric system of the English system Numerical value - CORRECT ANSWER reflects the precis...

CHEM 111 Exam 1 Review 77 Questions with Verified Answers physical vs. chemical change - CORRECT ANSWER physical- does not change the substance. change in matter but nor chemical composition chemical- substance is changed. energy is absorbed or released. one or more substances being used solid - CORRECT ANSWER often rigid with definite shape gas - CORRECT ANSWER fills container and is easily comressed liquid - CORRECT ANSWER flows and takes shape of container, has a op surface ...

What is the wavelength in meters of green light with a frequency of 5.75 × 1014 s−1? (a) 5.22 × 10−7 m (b) 1.92 × 106 m (c) 1.92 × 108 m (d) 1.73 × 1023 m - Answer-(a) 5.22 × 10−7 m What is the energy of a photon having a wavelength of 900 nm? (a) 3.33 × 1014 J (b) 2.21 × 10−19 J (c) 1.79 × 10−31 J (d) 5.96 × 10−40 J - Answer-(b) 2.21 × 10−19 J Which light has the highest energy? (a) 700 nm, red light (b) 575 nm, yellow light (c) 475 nm, blue light (d) 400 ...

CHEM 111 (test 1) Study Guide Questions With Complete Solutions

Calorimetry - Answer-science of measuring heat Calculate amount of energy released using E=mc(dT) - Answer-Energy released= (mass of water heated)x(specific heat of water)(temp. change) specific heat=1.0 cal/gC 1 Cal=1000 cal What is meant by small calorie "c" and food calories "C"? - Answer-"c" is a scientific calorie which is the energy required to rise the temp of 1 gram of water by 1C "C" is 1000 scientific calories-Food Calories When walking, an average person burns 0.453 Food...

CHEM 111 Midterm Exam WCCS 93 Questions with Verified Answers The nucleus of an atom consists of - CORRECT ANSWER protons and neutrons The Heisenberg Principle states that - CORRECT ANSWER it is impossible to determine accurately both the position and momentum of an electron simultaneously Rutherford carried out experiments in which a beam of alpha particles was directed at a thin piece of metal foil. From these experiments he concluded that - CORRECT ANSWER the positively charged parts...

CHEM 111 QUIZ 1 Questions with Complete Solutions.

Which of the following pieces of equipment is not used in the experiment to measure the relationship between pressure and volume? Correct Answer-an Erlenmeyer flask Which of the following statements is/are true? 1.Gases are easily compressed compared to other states of matter. 2.Gases expand to fill the volume of their container. 3.All gases that exist in real life are considered to be ideal gases. 4.Molecules of different gases readily mix with one another. Correct Answer-1,2, and 4 I...

Chem 111 General Chemistry 1 Practice Test #3 (Chapter 6 & 7) 50 Questions with Verified Answers 1. Which one of the following statements about balanced equations is TRUE? A reaction is balanced by A) multiplying by suitable coefficients B) changing the formula of the molecule C) changing the charge of an ion D) rearranging atoms in a molecule - CORRECT ANSWER A) multiplying by suitable coefficients 2. What is the stoichiometric coefficient for oxygen when the following equati...