What is the empirical formula of the ingredient
A sample of the active ingredient in a nutritional mineral supplement was found to contain 0.0392 moles of iron, 0.0393 moles of sulfur, and 0.157 moles of oxygen atoms. What is the empirical formula of the ingredient?
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A population has a known standard deviation of 25. A simple random sample of 49 items is taken from the selected population. The sample mean (x-bar) is 300. What is the margin of error at the 95% confidence level?
Water and diethyl ether are immiscible liquids. Charged compounds dissolve in water and uncharged compounds dissolve in ether. Given that benzoic acid has a pKa of 4.8 and cyclohexylamine has a pKa of 10.7:
What is the probability that Lisa smiles at Milhouse on exactly three days in a month? Use a Poisson approximation to calculate the probability that Lisa smiles at Milhouse on exactly three days in a month.
Let x be a random variable corresponding to the sum of the numbers on two fair dies(Hints, 2,3,4,....,12), Find the probability of P{x<8}.
A cyclotron accelerates two protons directly toward eachother, each with a speed of 850 km/s, measured relative to the earth. A.) Find the maximum electric force that these protons will exert on each other.
How many 103 W lightbulbs can you use in a 103 V circuit without tripping a 14 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbulb is 103 V.)
A sample of 2 different calculators is randomly selected from a group containing 18 that are defective and 37 that have no defects. What is the probability that the 2 calculators chosen have no defects? What is the probability that the 2 calculato
When a resistor is connected to a 10V source, it draws a 185mA current. The same resistor connected to a 96V source draws a 1.10A current. What is the rate of Joule heating in this resistor in both cases?
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