Can someone show me how to calculate the moles for number 2 and 4? Report Sheet

Question

Can someone show me how to calculate the moles for number 2 and 4?

Report Sheet SP 3.13 cup 15 DATA SUMMARY Mass 0.2530 empezanure 23.3 C Inkiai temperature 232 emperature 3H.g C AT 5.3 C. AT 1 -5 C AH CALCULAT TIONS your Hork) Calculate qe for the MglsyHCllag)reaction. 1023 417231 3,13 15 /02 2. Calculate demoles of magnesium reacted and the wer male reacted for the MetsyHCI(aa) reaction as written. 2204. DSB l, leulale the molesofmagnesium oxide reacted and the AH woarerMgoreacted far the MglsyHCIlag) reaction as wrinen.

Explanation / Answer

(2)

Moles of Mg used = mass / molar mass = 0.2534 / 24 = 0.0106 mol

Change in enthalpy = q / n

deltaH = q / 0.0106 J/mol

q is the value calculated in problem (1) in J

(4)

Moles of MgO = mass / molar mass = 1.0115 / (24+32) = 0.0181 mol

therefore,

change in enthalpy = q / n

deltaH = q / 0.0181 J/mol

q is the va;ue calculated in problem (3) in J

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