Form A Chemistry 100 Introduction to General Chemistry Fall Semester‚ 2010 Exam One‚ 150 points On this page print your name‚ your lab section number‚ and the name of your TA. Also sign this test booklet. Name________________________________Lab section____________TA___________ Signature________________________________________________________________ The exam consists of 21 problems and one extra credit problem. Partial credit is given only for work that is legible and logically and clearly
Premium Atom Chemistry Chemical element
Rates of Chemical Reaction II Pre-Lab Summary: First we will set up the experiment as shown in Figure 2‚ and then we will fill the trough with room temperature water and record the temperature and we will also add the room temperature water to the buret until it is about 10ml from the top. If there are no leaks in the apparatus‚ we will add 10ml of KI to 15ml of distilled water in a 125ml flask. We will swirl the flask so that it achieves room temperature‚ then we will add 5ml of H2O2 and quickly
Premium Chemical reaction
INTRODUCTION Sugar is one of the main food items consumed in Sri Lanka. The annual per capita consumption of sugar in Sri Lanka is around 30 kg and the total annual requirement of sugar in the country is around 550‚000t. But‚ only about 50‚000 t are produced locally. In a year only 38‚000 t were produced. The balance requirement has to be imported. The total annual expenditure on sugar imports is around Rs. 20 billion. Sugar cane (Saccharum officinarum) is the only crop cultivated in Sri Lanka
Premium Sugar Sucrose Ethanol
Analysis of a Chemical Reaction Purpose: To observe a chemical reaction and to use qualitative and quantitative evidence to identify this reaction from among four possibilities. Hypothesis: I think the result is going to produce water. I think this is going to happen because there is hydrogen and oxygen inNaHCO3. Materials: -Test tube clamp - 150 mm test tubes (2) - burner - retort stand - clay triangle - iron ring - crucible Procedure: Part A: 1. Add 0.5 g of NaHCO3
Premium Chemistry Chemical reaction Chlorine
weight of sample (g) – weight of ash (g) X 100 weight of sample (g) For sample A: % of ash = 2.2558 g-2.1987 g X 100 = 2.5313% 2.2558 g For sample B: % of ash = 2.0782 g-2.0249 g X 100 = 2.5647% 2.0782 g For sample C: % of ash = 2.5527 g-2.4859 g X 100 = 2.5709% 2.5527 g For average: % of ash = 2.2956 g-2.2365 g X 100 = 2.5745%
Premium Oxygen Standard deviation Variance
32 48 13 32 48 14 32 48 Ratio: 48:32=6:4=3:2=1.5 Conclusion: Answer the following questions in complete sentences‚ giving detailed explanations and support for each of your answers. 1. Explain in your own words what it means for a chemical system to be in the state of dynamic equilibrium. After a reaction has occurred for awhile at a given temperature‚ the forward and reverse reaction rate will eventually be equal. Although you may get this confused‚ the concentration may not be
Free Chemical reaction Ratio Chemical equilibrium
What makes a top 100 Hospital http://www.resource4pharmacymalpractice.com/negligence.html http://www.ccohs.ca/oshanswers/legisl/msdss.html#_1_1 What makes a top 100 Hospital Toi Lynn Santamaria DeVry University HSM310 online Professor Tammy Cagle What makes a top 100 Hospital The Cleveland Clinic is in the top 20 of the top 100 Hospitals. Its official
Premium Hospital Coronary artery disease
1. Determine the spring constant‚ k‚ of Spring 1‚ by using Hooke’s Law. Take three different measurements (since 3 masses) and do three calculations and average your k’s to get a more accurate answer. By applying lots of friction‚ you will be able to get your mass to hang still. Show a table of your data and your calculations of k. Spring 1 with three different masses: 50 grams: Spring stretched: 5m F = 50gm * 9.8 m/s2 = 490.00 N K= 490/5m = 98 100 grams: Spring stretched: 10m F = 100gm * 9
Premium Mass Force Friction
Properties of Chemical Reactions Ms. Whitty‚ Science 10 Fiona Adams‚ November 1st‚ 2012 Introduction Chemical reactions are a part of our daily lives‚ from rusting metal to making bread to leaves changing colour in the fall. A chemical reaction is the process that occurs when two or more substances combine to produce a chemical change. When a chemical reaction takes place‚ the change is indicated by one or more qualitative properties. The colour or odor could change‚ gas could be produced
Premium Chemical reaction Chemistry Sodium
100 Years of Yellow Color is omnipresent; we are educated about color‚ see it and use it every single day‚ and identify countless objects with it. Colors are prominent characteristics of our surroundings that may periodically go unnoticed‚ but are exceptionally significant in our everyday lives. The colors of streetlights and street signs are crucial to maintaining order‚ we are drawn to different things because of their colors‚ and artists produce masterpieces with combinations of colors. Gabriel
Premium Color Yellow