7. A 100 ml sample of 0.100 M NaOH was reacted with 100 ml of 0.100 M HCl in a coffee-cup calorimeter with lid by the following reaction:
HCI (aq)
+
NaOH (aq)
->
NaCl (aq)
+
H20 (aq)
If the temperature of the water and the calorimeter (heat capacity of calorimeter =
200 J/°K) increases from 25.00 °C to 25.97°C, (1) what is the AH of the reaction?
Using the definitions at the beginning of the module describe (2) the calorimeter +
contents, (3) the type of process.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

the answer is 1 i believe