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Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO3 and HI are mixed.

Ascorbic acid is Vitamin C, an essential dietary component since humans don’t make it themselves. Its pKa is 4.2. In human serum, that is buffered to pH 7.3, will vitamin C be primarily in the neutral form or the conjugate base anion ionized form?  

In neutral water at pH 7 the concentrations of H3O+ and -OH are identical, both are 10-7 M. If hydrochloric acid is added to neutral water such that the pH decreases to 3.0, what is the concentration of -OH after addition of the acid? pH = -log10 [H3O+] Kw  = 1 × 10-14

What is the recommended number of foot contacts for an athlete with intermediate experience in plyometrics? 

Which of the following substances can be metabolized anaerobically?

When aqueous solutions of AgNO3 and KI are mixed, silver iodide precipitates. The balanced net ionic equation is ________.

When the following equation is balanced, the coefficient of HCl is __________.  

An automobile engine provides 800J of work to push the pistons and generates 2250J of heat that is carried away by the cooling system.  Calculate the change in internal energy of the engine. (5pts)

How many significant figures are in 4.500 × 104 m?

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Na2CO3 and HCl are mixed.