What is the percent of nitrogen (N) by mass is a 55.0g sample of Fe(NO3)3? The molar mass of Fe(NO3)3 is 241.86g/mol.

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

In 2002, the rare earth elements mine in mountain pass, california was closed because

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign