For each of the following, indicate if the number of half-lives elapsed is: 1. one half-life 2. two half-lives 3. three half-lives a. a sample of ce-141 with a half-life of 32.5 days after 32.5 days b. a sample of f-18 with a half-life of 110 min after 330 min c. a sample of au-198 with a half-life of 2.7 days after 5.4 days

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

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Calculate: select the worksheet tab. this tab you calculate the analyte concentration.  fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.)  record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes.  record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed