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)?

A solution of AgNO3 is titrated with 55.61 mL of 0.03655 M CaCl2 .  Which of the following statements are true?   no reaction happens silver chloride is a precipitate calcium nitrate is a precipitate   When the precipitate is dried and weighed, how much precipitate would there be?   0.2913 g 0.5826 g 0.3335 g  there is no precipitate