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Three different bottles of vinegar were analyzed by the same analyst for percentage acetic acid content. The following results were obtained. Bottle no.1 Bottle no. 2 Bottle no.3 3.88 [F] 8.13 3.92 [G] 8.19 3.75 [H] 8.17 3.84 [I] 8.05 3.91 [J] 8.21 Calculate the  margin of error for the 95% confidence interval for sample 2 if s→σ.

When extracting a sample with a liquid, the liquid is __________ from the sample.

A(n) _____________ is used to grind solids into smaller particles.

Determine the concentration of Ca2+ in a solution with a pCa2+ of 10.20. Report the concentration with the correct number of significant figures. pCa2+ = –log[Ca2+]

Which statements are TRUE regarding the expression of the concentration of a 54.9-ppm Fe solution in terms of molarity?

Find the mean of the following data: (report 2 decimal places) [A], [B], [C] 

Find the molarity [M] and molality [m] of a 44.0 wt% H2SO4 (FM 98.079) solution with a density of 1.338 g/mL.

A(n) __________ sample is a sample in which the chemical composition differs from place to place.

For the following set of replicate measurements calculate the: (Report to 2 decimal places) Mean [A], [B], [C], [D], [E], [F]

Which step(s) is/are NOT required in the practice of weighing by difference? Weigh a capped bottle containing the dry reagent. Quickly pour some of the dry reagent from the weighing bottle into a receiver. Weigh the receiver containing the dry reagent. Recap the bottle that now contains less of the dry reagent. Reweigh the capped bottle that contains less of the dry reagent.