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Which element is a Period 6 transition metal?

What is the oxidation number of chromium in the dichromate anion?

What is the systematic name of H2CO3 (aq)?

Write the balanced molecular equations, including states of matter, for each of the following situations if a reaction is expected to occur.  If no reaction occurs, write “NR” (no reaction).   A.   (4 pts)  A chunk of zinc is dropped into a beaker of aqueous acetic acid. B.   (4 pts)  Aqueous solutions of cuprous sulfate and strontium iodide are mixed together. C.   (4 pts)  Rubbing alcohol (isopropanol, C3H8O) is burned (combusted).

What is the name of this element, whose element symbol is shown below?  Enter the name in all lowercase. C

What is the concentration (in % w/v, which is the same as % m/v) of a 0.835 M aqueous sodium chloride solution?

What is the systematic name of a compound containing seven Cl atoms and three P atoms?

A 248-gram piece of aluminum initially at 94.1°C is dropped into water in a coffee-cup calorimeter initially at 2.2°C.  If the final temperature of the aluminum and water is 18.7°C, what mass (in g) of water is present in the calorimeter? Assume all heat transfer occurs between the aluminum and water, and that the density of water over the relevant temperature range is 0.997 g/mL.  Show all work, and highlight your answer in a readable background color.

A titration was performed to try to determine the concentration of a sodium phosphate solution, using a 0.155 M calcium nitrate solution as a standard.  50.00 mL of sodium phosphate is added to an Erlenmeyer flask, and the calcium nitrate solution is added to a buret.  The initial reading of the buret at the start of the titration is 0.16 mL.  The final reading of the buret at the end of the titration is 39.55 mL.  What is the concentration of the sodium phosphate solution? Show all work, and highlight final answers in a readable background color.

To a beaker containing water, you add so much table sugar that it doesn’t fully dissolve in the water.  Which of the following is true about the contents of the beaker?