A company claims that one of their antacid tablets contains 0.400g of calcium. A student did
an experiment to measure the amount of calcium
in a single tablet, which came out to be 0.365g.
What is the percent error in the student's
measurement?
А
B
8.8%
9.6%

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)