Nitrate salts (no3), when heated, can produce nitrites (no2) plus oxygen (o2). a sample of potassium nitrate is heated, and the 02 gas produced is collected in a 700 ml flask. the pressure of the gas in the flask is 2.7 atm, and the temperature is recorded to be 329 k. the value of r= 0.0821 atm l/(mol k) how many moles of o2 gas were produced? moles after a few hours, the 700 ml flask cools to a temperature of 293k. what is the new pressure due to the o2 gas?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600