By R Nelson Smith; Willis Conway Pierce
With the start of the digital hand calculator and the dying of the slide rule, the instructing of common chemistry entered a brand new period. regrettably, the alculator didn't carry automated figuring out of chemistry; examining and fixing difficulties is simply as tough as ever. the necessity for specific motives, drill, and overview difficulties remains to be with us. This booklet, "Solving normal Chemistry Problems", via R.N. Smith, is a replication of a publication initially released sooner than 1980. it's been restored via humans, web page via web page, so you may well get pleasure from it in a kind as as regards to the unique as attainable. This booklet used to be created utilizing print-on-demand expertise. thanks for aiding vintage literature
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003 with a confidence level of 80%. 707 3499 3355 3250 2861 2756 2704 2678 2660 2617 2576 * Statistical manuals usually list degrees of freedom in this column with values that are equal to the sample size minus one PROBLEM: The average result of a set of 1000 measurements is to be reported with a confidence interval representing a confidence level of 80%. 0. Find the confidence interval. SOLUTION: The set of 1000 measurements is so large that the value of? differs negligibly from that for an infinitely large set of measurements, so we use the bottom row of Table 5-1.
20. 5 x 10~'°. 0 g of gold? 21. 0 g of sodium hydroxide per liter. How many grams will be contained in 50 ml? 22. A solution contains 40 g of potassium nitrate per liter. 0 g of potassium nitrate? 23. The neck of a volumetric flask has an internal diameter of 12 mm. The usual practice is to fill a volumetric flask until the liquid level (meniscus) comes just to the mark on the neck. 050 ml) too much is added, at how many millimeters above the mark on the neck will the meniscus stand? Assume a plane (not curved) meniscus.
PROBLEM: Determine the correlation coefficient r for the best-fit equation obtained in the problem on p 75 involving thermocouple voltage versus temperature. SOLUTION: Work the problem exactly as you did previously, but with the additional knowledge of how to display r with your make of calculator, or with the program you use. , £y ( , 2yf, and 2x,;y,. Then calculate m with Equation 6-12b, m' with Equation 6-14b, and finally r with Equation 6-17. 9999, a very good correlation indeed. Reliability of Slope and the y Intercept It is a common practice to derive some important physical or chemical characteristics from the slope or the y intercept of a graph constructed from experimental data points.
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