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Identify the spectator ions in the following molecular equation. (NH4)2CO3(aq) + Sr(NO3)2(aq)  →  2NH4NO3(aq) + SrCO3(s) 

Match the following terms with their definitions. Write ONLY the NUMBER that is in the column on the left of the definitions in the answer field next to each term.  (There are more definitions than needed.)     Terms:  a) base- [bs] b)  theoretical yield- [yld] c) mole- [mol]    d) solvent – [svnt]      Definitions:      1  solution component present in a concentration that is lower relative to other components 2  weighted average of the atomic masses of all stable isotopes of an element, in amu 3  solution component present in a concentration that is higher relative to other components 4  substance that produces OH− when dissolved in water 5  process in which an element’s oxidation number is increased by loss of electrons 6  amount of substance containing the same number of atoms, molecules, ions, or other entities as the number of atoms in exactly 12 grams of 12C 7 process in which an element’s oxidation number is decreased by gain of electrons 8  experimentally determined value of the number of entities comprising 1 mole of substance, equal to 6.022 × 1023 mol−1 9  amount of product that may be produced from a given amount of reactant(s) according to the reaction stoichiometry

In the GI tract, barium sulfate can produce an insoluble precipitate with calcium to form a:

True/False.   ALL radiopaque contrast media are derivatives of tri-iodinated benzoic acid. 

Write the complete ionic equation for the following molecular equation.  Include phases.    Pb(NO3)2 (aq) + 2 NaBr (aq)  →  PbBr2 (s) + 2 NaNO3 (aq)

The molarity (M) of an aqueous solution containing 52.5 g of sucrose, C12H22O11, in 35.5 mL of solution is __________.  

Silicon nitride is a very hard, high-temperature-resistant ceramic used as a component of turbine blades in jet engines. Upon reaction of 38.6 g solid silicon with excess nitrogen, 44.8 g of silicon nitride was obtained according to the balanced equation: 3 Si(s)+2 N2(g)⟶Si3N4(s)   What is the percent yield of silicon nitride?  (If you wish, show your work for possible partial credit.)

NMES for spasticity reduction frequently includes which of the following:

Barium sulfate is which of the following?   

What is the chemical formula of barium sulfate?