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A scientist measures out the following volume of stock hydrochloric acid with a concentration of 10.5 M (the volume of the stock added is shown in the figure of the graduated cylinder below with the arrow pointing to the bottom of the meniscus). The solution is diluted to a final volume of 250.0 mL, what is the final concentration of the diluted solution.   

What volume in mL of 0.322 M magnesium hydroxide (Mg(OH)2) is required to reach the equivalence point (neutralize) 45.0 mL of 0.319 M hydroiodic acid (HI)? 

What is the sum of coefficients when the neutralization reaction occurs between nitric acid (HNO3) and barium hydroxide (Ba(OH)2)?   

HEPES buffer (C8H18N2O4S) in used for cell cultures. A researcher needs 0.0100 M of HEPES. What mass of HEPES in grams would be needed to produce 320.0 mL of solution. 

Below is an image of a coffee cup calorimeter with 92.7 g or water.  The temperature of water is measured before and after the addition of an 50.0 g of unknown metal.  How much energy is gained or lost by the water.  The specific heat of water is s = 4.184 .

Using the image below regarding a participation reaction to determine the spectator ions and the net ionic equations? 

The following reaction is used to produce copper metal:

Calculate the enthalpy of the combustion of butene based on the standard enthalpies of formation in the table below. 

Determine if the following processes are endothermic or exothermic.  Breaking a covalent bond [1]

Use the following reaction identify the oxidizing and reduction agents.