SLE111 Lecture 10: Week10 Tutorial 1

• An analysis of a compound shows that it contains 19.8 g. of Carbon, 2.50 g. of Hydrogen, and 11.6 g of Nitrogen. What is the percentage composition of C, H, O?

Aluminium has a density of 2.7 g/cm³ and a specific heat of 0.9 J/g.⁰C. A 9.7 cm³ piece of Aluminium at an initial temperature of 125 ⁰C is dropped into an insulated container with 120 g water initially at 18 ⁰C. What will the final temperature of the Aluminium-water mixture? (Specific heat of water: 4.186 J/g.⁰C)

Number of atoms present in 34 g of NH3