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?

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?

New element X has two isotopes.  Isotope 1 has an isotopic mass of 311.001363 amu, whereas isotope 2 has an isotopic mass of 314.983097 amu.  If the atomic mass of X is 314.293201 amu, calculate the relative abundance of isotope 2. Show all work, and highlight your final answer in a readable background color.

(1) To open the equation editor, click the icon that says “Insert Math Equation” (looks like a square root symbol). Editor opens in Basic View by default. (2) Pressing left parenthesis will automatically put in the right parenthesis after that, and you’ll be able to type anything inside the parentheses. (3) The “Basic” menu has the functions for subscripts, superscripts, fractions, and normal math operations (4) The “Greek” menu allows you to put in Greek letters. If you want to type something in isotopic notation, you will need the Advanced View.  Click the link that says, “Switch to Advanced View”. (5) You will have to type what you want in a special code, using symbols to indicate superscript and subscript.  Don’t use spaces. ^ for superscript _ (underscore) for subscript use squiggly brackets { } after the ^ and _ symbols if multiple characters are to be superscripted or subscripted. after inserting the equation, you can resize by clicking on the equation, and dragging on one of the corners to make the equation smaller or larger Example:  ^{cats}_{dogs}eat^{food!}                     results in            

What is the symbol of the element below?  Enter the name using correct case (lowercase/uppercase). calcium

What is the symbol of the element below?  Enter the name using correct case (lowercase/uppercase). magnesium