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

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) 

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

Lithium hydroxide, LiOH is titrated with phosphoric acid, H3PO4 .  When the equation is balanced, what is the sum of all of the coefficients?

If the reaction to produce ammonia from hydrogen and oxygen produces 4.68 g of ammonia at a percent yield of 55.1%, what is the theoretical yield for the reaction? 3 H2 (g) + N2 (g) ->  2 NH3 (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)?

Which statement is/are correct regarding an aqueous mixture of AgNO3 and HBr? i.  The net ionic equation would be:  Ag+ + Br- ––> AgBr (s) ii.  Silver would be a spectator ion iii.  NO3– would be a spectator ion

If the reaction to produce ammonia from hydrogen and oxygen produces 2.52 g of ammonia at a percent yield of 46.5%, what is the theoretical yield for the reaction? 3 H2 (g) + N2 (g) ->  2 NH3 (g)

An argon laser is used in underwater communication in the ocean because salt water is transparent to the frequency of this laser.  The wavelength of the argon laser is 488 nm.  What is the energy of one photon of this light?

What is the molarity of acetate ions, C2H3O2–, if 4.34 g of strontium acetate, Sr(C2H3O2)2, is in a 190.0 mL solution?