Determine the empirical and molecular formulas of compound
A compound having an approximate molar mass of 120-15 g has the following percent composition bymass: carbon, 38.44%; hydrogen, 4.839%;chlorine, 56.73%. Determine the empirical and molecular formulas of the compound.
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A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 290 babies were born, and 261 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girl
What is the longest beam you can make that does not yield while supporting only its own weight. Assume that shear stresses on the cross section are negligible compared to (normal) stresses due to bending.
A compound having an approximate molar mass of 120-15 g has the following percent composition bymass: carbon, 38.44%; hydrogen, 4.839%;chlorine, 56.73%.
If electrical energy costs 12 cents, or $0.12, per kilowatt-hour, then what would the following events cost? (a) burning a 120 W light bulb for 24 h straight
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A high-voltage transmission line with a resistance of 0.31 /km carries a current of 950 A. The line is at a potential of 710 kV at the power station and carries the current to a city located 164 km from the station. (a) What is the power loss due
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