A3.53g sample of (nh4no3) was added to 80.0mlof water in a constant pressure calorimeter of negligible heat capacity. as a result the temperature of the water decreased from 21.6c to 18.1c calculate the heat of solution of nh4no3. me

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

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