A saline solution is prepared by mixing 21.384 g of NaCl into enough water to make 220.00 mL of solution.  325.00 mL of water is then added to the first solution.  What is the concentration of the final solution?

Phosphoric acid, H3PO4 is titrated with NaOH.  When the equation is balanced, what is the sum of all of the coefficients?

A researcher runs an experiment that produces 113.4 g of aluminum sulfate when adding 23.7 g of aluminum to excess sulfuric acid according the the following equations.  What is the percent yield of the reaction?  2Al(s) + 3H2SO4(aq) 

Which of the following statements is/are true?  The electron configuration of sulfur (S) is [Ne]3s23p4 The electron configuration of tin (Sn) is [Kr]5s24d105p2 The electron configuration of antimony (Sb) is [Kr]5s25d104d3

What is the molarity of acetate ions, C2H3O2–. if 3.41 g of magnesium acetate, Mg(C2H3O2)2, is in a 260.0 mL solution? 

Which of the following when mixed with potassium sulfate (K2SO4) will produce a precipitate?  Cu(NO3)2 Pb(ClO4)2 BaBr2

Which of the following statements is/are correct? (3, 0, 0, -) is an electron set for an electron in a 3s orbital (3, 3, 0, -) is a valid set of quantum numbers (2, 1, -1, +) is a valid set of quantum numbers 

Identify each of the following compounds as a strong electrolyte, weak electrolyte, or non-electrolyte using the dropdown menu. 1.  NaCl is a [1] 2.  C12H22O11 is a [2] 3.  NH3 is a [3] 4.  HClO4 is a [4]

For the following reaction 6.52 g of lithium is reacted with 10.1 g of nitrogen gas.  What is the theoretical yield of lithium nitride?  6 Li(s) + N2(g) 

What volume (mL) of 0.0225 M barium hydroxide (Ba(OH)2) is need to reach the equivalence point when you have 215.0 mL of 0.145 M  perbromic acid (HBrO4)?