1. When a bracelet weighing 383 g in air is submerged in water, a scale measures a weight of 349 g. What is the density of the bracelet? Is the bracelet
made of pure gold or something else? Explain. (Use 1.00 g/cm'as the density
of water and 19.3 g/cm'as the density of pure gold.)

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

The minerals found in bones are deposited by living cells called

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons