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Laquitta Ballentine

Laquitta B.

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Vinegar contains carbon, hydrogen, and oxygen with percent masses of 40.01% C, 6.70% H, and 53.29% O, respectively. Determine the empirical formula of the compound. HOW DO WE GET THERE? Question Content Area What is the mass of each element in 100.0 g of vinegar? (Enter your answers to two decimal places.) Percent Mass Mass in 100.0 g 40.01% C ? g C 6.70% H ? g H 53.29% O ? g O g C g H g O

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When a 0.2481-g sample of titanium metal is reacted with oxygen, the final mass of the resulting compound is 0.4139 g. Determine the empirical formula of this titanium oxide. What is the empirical formula for this compound? Empirical formula =

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When a 0.2481-g sample of titanium metal is reacted with oxygen, the final mass of the resulting compound is 0.4139 g. Determine the empirical formula of this titanium oxide. What are the moles of each element in the titanium oxide compound? (Enter your answer to four significant figures.) mol Ti mol O

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You are told to construct a 10.8 % confidence interval knowing that your sample mean is x = 161, your sample standard deviation is s = 9.2 and your sample size is 322. You calculate that z = 0.14 Construct your confidence interval:

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You are told to construct a 68.6 % confidence interval knowing that your sample mean is x=102 your sample standard deviation is s=1.5 and your sample size is 258. You calculate that z=1.01 Construct your confidence interval:

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Suppose a sample of size 12 is taken. Find the probability that the sample mean blood pressure is more than 136 mmHg. Round to four decimal places. P(x̄ > 136) =

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Suppose a sample of size 12 is taken. State the standard deviation of the sample mean. Round to two decimal places. σx̄ =

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Suppose a sample of size 12 is taken. State the mean of the sample mean. μx̄ = Suppose a sample of size 12 is taken. State the standard deviation of the sample mean. Round to two decimal places. σx̄ = Suppose a sample of size 12 is taken. Find the probability that the sample mean blood pressure is more than 136 mmHg. Round to four decimal places. P(x̄ > 136) =

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Suppose a sample of size 12 is taken. State the mean of the sample mean. μx̄ =

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The average price of a college math textbook is $160 and the standard deviation is $20. Suppose that 11 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. For the group of 11, find the probability that the average price is between $163 and $168.

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