Measurement in Chemistry Assignment‚ Due 22 March‚ Surname A-D Instructions: All questions must have the correct units and correct number of significant figures. Show all calculations and carry the units throughout. Submit your answers on a new page. Include your name and student number. Q1. Report the number of significant figures in each of the following: a. 0.20 b. 9.05 c. 164300 (1 mark) Q2. Report each of the
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interquartile range‚ variance‚ and standard deviation. Answers: Data values: 15‚ 20‚ 25‚ 25‚ 27‚ 28‚ 30‚ 34 a) Mean: [pic]= ∑xi/n = (15+20+25+25+27+28+30+34) / 8 = 204 / 8 = 25.5 Median: Even number‚ so median is = (25+27)/2 = 26 Mode: Most frequent number = 25 b) 20th Percentile = (P/100)n = (20/100)8 = 0.2x8 = 1.6 = 2 65th Percentile = (65/100)8 = 0.65x8 = 5.2 = 6 75th Percentile = (75/100)8 = 0.75x8 = 6 c) Range: Largest data value
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Avogadro’s Number and Molar Mass Handout Key 1. What is the coefficient for oxygen when the following equation is balanced using the lowest‚ whole numbered coefficients? ____ C3H8O(g) + ____ O2 (g) ____ CO2 (g) + ____ H2O(g) a) 3 b) 5 c) 7 d) 9 2. What is the sum of the coefficients when the following equation is balanced using the lowest‚ whole numbered coefficients? _____ PH3 (g) + _____ O2 (g) _____ P4O10 (s) + _____ H2O(g) a) 10 b) 12 c) 19 d) 22 3. What is the sum of the coefficients when
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of study. Do not forget‚ whenever you look up information‚ you need to cite your sources! Please copy and paste the full URL of any website you use in researching your answers to the following questions. If you use your book‚ please place the page number from your book in parentheses next to the answer. Unit 3 is a Master Learning Unit. A Master Learning Unit presents an opportunity for you to grow and improve as a student. In order to qualify for Master Unit Grading you must: Respond to all questions
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How was Avogadro’s number determined? Jessica Kim 12D Starting from 200 years ago‚ scientists tried to figure out the basic ideas of chemistry. One of them they put lots of effort in was to find out the mass of the smallest particle‚ mole. Measuring the mass was a primary difficulty at that time since one mole of a substance was unable to weigh without using developed technology. Even though‚ it was clear that everything was made out of a small unit‚ there was no evidence that could determine
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FHMM1014 Mathematics I Chapter 1 Number and Set FHMM1014 Mathematics I 1 Content 1.1 Real Numbers System. 1.2 Indices and Logarithm 1.3 Complex Numbers 1.4 Set FHMM1014 Mathematics I 2 1.1 Real Numbers FHMM1014 Mathematics I 3 Real Numbers • Let’s review the types of numbers that make up the real number system. FHMM1014 Mathematics I 4 Real Numbers i). Natural numbers (also called positive integers). N = {1‚ 2‚ 3‚…..} ii). Integers. Natural numbers‚ their negatives and zero. Z = {……
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also discuss a few shortcomings of the absorption approach and how it relates to management. And finally‚ we will see if Mr. Rosen’s decision would allow him to be considered for the CEO position. Absorption vs. Variable Costing (Contribution margin) “The main difference between variable costing and absorption costing is the accounting for fixed manufacturing costs.” (Horngren C. n.d.) This is never more evident than in this case study. Income statements prepared using these different methods
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ATH Technologies Inc.: making the Numbers The case of ATH is centered on management taking particular strategic paths in order to achieve the desired organization objective(s). Beginning with the strategy of acquiring market share‚ Scepter implemented very attractive (personal) incentives in order to achieve this goal. These “earn out” incentives did indeed push for innovation‚ growth and market segment but it didn’t put any controls on the amount of spending‚ thus ultimately leading to major
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Number One By: Jill Nelson I like this story by Jill Nelson. Jill Nelson and her family were living well for a black family back in the 1960s. Jill’s father would have the family sit at the table for Sunday breakfast and preach his own version of the sermon. Jill’s favorite Sunday breakfast sermon was the "Rockefeller wouldn’t let his dog shit in our dining room" sermon. Her father was smart because he made Jill try to be number one all the time. For 15 years straight Jill’s dad
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thought a phone could be such a suspenseful object… Sorry‚ Right Number by Stephen King and Sorry‚ Wrong Number by Lucille Fletcher‚ are both mystery plays. They are very suspenseful and entertaining‚ both involve an important phone message. The main character in both stories is a woman who gets neurotic over a phone call‚ but rightly so. These stories are older but are very interesting. Sorry‚ Wrong Number is about a invalid woman‚ Mrs. Stevenson‚ who is neurotic. She
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