Q I need help understanding and answering these Chemistry questions. Please show steps/workout on how you got to the right answer Thank you.

 

Q1. 0.200 L of 0.200 M HCl are mixed with 0.200 L of 0.200 M NaOH in a coffee cup calorimeter. The temperature of the solution increases from 22.15 ^oC to 23.48 ^oC. Assume the densities of the two solutions are 1.00 g/mL. What is the heat change (kJ/mol) associated with the following reaction?

 

HCl + NaOH → NaCl + H₂O   

 

Q2. Vitamin C (molar mass 176 g/mol) consists of carbon, hydrogen and oxygen. When a 1.000 g sample of Vitamin C was burned in excess oxygen, the following results were obtained:

 

Mass of CO₂ absorbed after combustion      85.35 g

Mass of CO₂ absorbed before combustion   83.85 g

Mass of H₂O absorbed after combustion     37.96 g

Mass of H₂O absorbed before combustion  37.55 g

 

What is the molecular formula of Vitamin C? 

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Status NEW Posted 23 Aug 2017 08:08 AM My Price 5.00

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