Describe the percent by mass of each compound
A 0.8870-g sample of a mixture of KCl and NaCl is dissolved in the water, and the solution is then treated with an excess of AgNO3 to yield 1.822g of AgCl. Determine the percent by mass of each compound in the mixture
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The minimum energy required to knock an electron out of an atom of cesium is 3.43 x 10-19 J. Cesium metal is used in the photocells of automatic door openers.
The total of $12,000 is invested in 2 funds paying 9% and 11% simple interest. If interest for first year is $1,180, how much of $12,000 is invested at 9%?
Ben claims that the average price of the car wash in West Newton is more than $6.00. A sample of five car washes has average price of $6.60 and standard deviation of $1.10. At alpha = 0.05, test Ben's claim. What is the null hypothesis?
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The probability that an individual has 20-20 vision is 0.17. In a class of 49 students, what is the probability of finding five people with 20-20 vision?
Explain how much potassium chlorate is required to form the 20.0 mL of oxygen gas at the 670 mmHg and 20oC given the equation: 2KClO3(s) →2KCl(s) +3O2(g)?
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