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Question- How many moles of NaOH must be added to 0.400 L of 0.177 mol/L HCOOH(aq) to obtain a solution with pH=3.5? Assume the temperature is 25oC. (For HCOOH, pKa=3.74 at 25oC).
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Label each of the following phase changes as either exothermic or endothermic. i. H 2 O( s ) + heat H 2 O( l ) (1 point) ii. H 2 O( g ) H 2 O( l ) + heat (1 point)
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How many moles of magnesium ion are present in 5.25g Mg 3 (PO 4 ) 2 ?
When the concentration of A in areaction was changed from 1.20 M to 0.600M, the half -lifeincreased from 3-00min to 6.0 min at 250C. Calculate theorder of reaction and the rate constant.
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