Question 1 1 out of 1 points The volume of a regular cylinder is V = πr2h. Using the value 3.1416 for the constant π‚ the volume (cm3) of a cylinder of radius 2.34 cm and height 19.91 expressed to the correct number of significant figures is _________. Selected Answer: d. 342 Correct Answer: d. 342 Response Feedback: Correct Question 2 1 out of 1 points There are ____________ significant figures in the answer to the following computation: (29.2 - 20.0 ) (1.79 x 105)
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Part One (Flame Test): 1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame Solution Name Color description 1 Barium Lime green 2 Calcium Red 3 Sodium Yellow 4 Rubidium Purple 5 6 Potassium Lithium Blue Pink Unknown 1 Sodium Yellow Unknown 2 Potassium Blue 2. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did. Unknown 1 was sodium
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LAB 3.Ø.Ø: do ions combine in definite ratios PURPOSE The purpose of this investigation is to determine whether ions combine in definite ratios or not. To observe‚ and create a table of the different ions. QUESTION If copper (II) sulfate when mixed with sodium carbonate at different quantities combine to form ions in definite ratios. HYPOTHESIS / PREDICTION I believe that the ions will combine in definite ratios due to the fact that the valance electrons will not be changing throughout any
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with the glass rod. c. Note after one minute‚ (i) the temperature‚ (ii) whether the solid has dissolved and (iii) anything else you see. For example‚ is gas evolved at any time? If so‚ is the gas acidic? Can you identify it using a simple test? Lab manual version 4.1 Foundation in Science 1 UTAR FHSC1134 Inorganic Chemistry Trimester 3 d. Add 2 -4 drops of universal indicator solution‚ compare the color with the chart provided‚ and note the pH
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space -Elements are the most basic substances something can be broken down into. There are about 100 elements known to scientists right now. There may be more‚ but elements with more than 100 protons are extremely unstable and may only be created in labs. -Atoms are the smallest building blocks of matter‚ each element is made up of a SPECIFIC type of atom. When atoms combine they form MOLECULES. -Macro is big. Micro is small. -Chemistry is a central science which means that it can be incorporated
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101‚40 Higher Water Level (±0.05cm) 21‚5 24‚5 28‚5 Lower Water Level (±0.05cm) 12‚5 11‚0 13‚5 Pressure of Atmosphere/ (±0.005kPa) * The temperature is converted to Kelvin from Celsius for the significance of this lab. ! Qualitative Observation ! I. Bubbles that vary in sizes form from the copper (Cu) coiled magnesium (Mg) travel upwards the
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Chemistry 2283g Experiment 1 – Alkyl Halides EXPERIMENT 1: Preparation and Reactivity of Alkyl Halides Relevant Sections in the text (Wade‚ 7 ed.) • 6.7 (p. 228) Reactions of alkyl halides • 6.8 – 6.12 (p. 229 – 242) The SN2 reaction: generality‚ factors affecting SN2 reactions‚ substrate reactivity‚ mechanism • 6.13 – 6.14 (p. 243 – 249) The SN1 reaction: mechanism‚ stereochemistry General Concepts The most common of the variety of methods available for preparing alkyl halides is the replacement
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Chem Med Case 1 Chem-Med Company 1. What was Chem-Med ’s rate of sales growth in 2003? What is it forecasted to be in 2004‚ 2005‚ and 2006? Sales Growth = (Sales this year - Sales last year)/Sales last year for 2003: ($ 3‚814 - $3‚051) / $3‚051 = + 25% for 2004: ($ 5‚340 - $3‚814) / $3‚814 = + 40% for 2005: ($ 7‚475 - $5‚340) / $5‚340 = + 40% for 2006: ($ 10‚466 - $7‚475) / $7‚475 = + 40% 2. What is the company ’s rate of net income growth in 2004‚2005‚ and 2006? Is projected net income
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Epoxidation Reactions Lab Report 2 Abstract An oxygen atom is transferred from a peroxy acid to the carbon=carbon double bond thus forming an epoxide. Scheme 1. Oxone Epoxidation. Scheme 2. mCPBA Epoxidation. The percent yield for the Oxone epoxidation reaction was 65% yield and the mCPBA epoxidation reaction was 70% yield. Oxone is the greener alternative because using mCPBA is twice as expensive as Oxone and leaves behind the epoxide plus m-chlorobenzoic acid while Oxone creates non-toxic
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Tashia & Tobi Lab Report experiemt 5 INTRODUCTION In this experiment we were wanting to find the specific heat of an unknown metal and determining what metal it was by using the formula q=c X m X change of temperature. We did two trials to compare the two and see what we come up with. EXPERIMENTAL First we chose an unknown metal‚ in which our unknown was unknown metal 2‚ the metal was gray and irregular shaped. We setup the calorimeter and got a mass of it just being empty then we got
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