when it’s burning for at least 5 minutes. Record. 4. Blow the candle out. Observe the candle until no more changes are taking place. Observation before burning: + white +solid + the wick is black (got burned) +smell fresh Observation during burning: +fire +yellow on the very top of the wick‚ blue at the bottom + melting -> clear liquid +hot Observation after burning: +liquid + the wick turns into dark black + burn’s smell +Liquid turns solid after leaving it for a while
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October 1‚ 2013 Chemical Reactions of Copper Objective The objective of this lab is to convert copper (Cu0) “in a series of reactions to various compound containing copper as the Cu2+ species” (CHM111 Laboratory Manual) in order to prove the Law of the Conservation of Mass. Introduction In this experiment‚ we took a look at how copper (Cu0) reacts with different substances to get an end result where it is transformed back to its original state. There were five different reactions that involved
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what it is and how to classify the object. The object of the lab conducted was to find the density of the substances given and to find what the unknown liquid and solid were. The process to finding what the unknown solid and liquid were‚ was to find the density and to conduct multiple trials so when the density is discovered‚ it is possible to compare the density found to another one in order to find the liquid or solid. Through finding the density of objects and substances‚ it
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Conclusion: The purpose of this lab was to synthesize and purify aspirin. The theoretical yield was calculated to 3.766g. The actual yield of pure aspirin was 2.863g with a yield of 76%. The percent yield indicates that our synthesis was a success but the yield is low and indicates that some of the aspirin was lost during synthesis. Some reasons for loss can result from human error such as loosing product from sticking on the spatula and the Buchner funnel and several weighings. Also‚ when transferring
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short-term 3‚100 3‚100 3‚100 Accrued payables 300 300 300 Long-term liabilities 3‚800 3‚800 3‚800 a. Compute the current and quick ratios for each of the three companies. (Round calculations to two decimal places.) Which firm is the most liquid? Why? Account Edison Stagg Thornton Cash 6‚000.00 5‚000.00 4‚000.00 Short term investments 3‚000.00 2‚500.00 2‚000.00 Accounts receivable 2‚000.00 2‚500.00 3‚000.00
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APES Unit 24 Solid and Hazardous Wastes Municipal solid waste (MSW) consists of solid materials discarded by homes‚ office buildings‚ retail stores‚ restaurants‚ schools‚ hospitals‚ prisons‚ libraries‚ and other commercial and institutional facilities. Non Municipal solid waste consists of solid waste generated by industry‚ agriculture‚ and mining. A sanitary landfill is the most common method of disposal of solid waste by compacting it and burying it under a shallow layer of soil. The
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to produce evidence to support our hypothesis? Step 3: Identify the statistics being tested and the data that will be used to support the hypothesis. Step 4: Find the critical value and determine what evidence will directly support a hypothesis. Step 5: Calculate the value of the test statistic‚ using the sample data. There are two types of hypothesis you have a null and an alternative hypothesis. Null can arise in many different ways. It may link to the prediction. May signify some simple circumstances
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Separation Lab Purpose: This lab was based on the separation of the components of a mixture. A mixture can be defined as a physical combination of two or more pure substances. Separation techniques are used to separate components that are not chemically combined. All of these techniques involve changes in the physical state of a chemical compound rather than chemical changes. Sea sand‚ table salt‚ and two other unknown substances will be separated using the separation techniques in order to demonstrate
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Abstract This lab’s purpose was to test the patterns of percolation in various places. This lab tested how soil would absorb water based on different places. Distance from a group of trees‚ distance from a swamp‚ and different types of soil were tested. From the results collected‚ you can not prove‚ but you can infer that the ability to absorb increases as you go farther away from a swamp‚ and a group of trees. The ability to absorb also increases based on how much silt is in soil. Introduction
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........................................................................................................4 Descriptions…………...............................................................................................................................5 Theory………………….............................................................................................................................. 7 Calculation................................................................................................
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