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What are the pros and cons of a non-disclosure agreement (NDA) be used?  When should a NDA be used?

Given the following reaction and enthalpy values, calculate the enthalpy change for the reaction C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(l) ΔH°f [C₂H₄(g)] = 52.3 kJ/mol ΔH°f [O₂(g)] = 0 kJ/mol ΔH°f [CO₂(g)] = -393.5 kJ/mol ΔH°f [H₂O(l)] = -285.8 kJ/mol?

A gas sample occupies 2.0 L at 25°C. What will its volume be at 50°C, assuming constant pressure?

A gas sample has a volume of 5.0 L, a pressure of 2.0 atm, and a temperature of 25°C. How many moles of gas are present? R = 0.0821 L atm/mol K?

How much heat is required to raise the temperature of 200 g of water from 25°C to 50°C? The specific heat capacity of water is 4.184 J/g°C?

Given the following reaction and enthalpy values, calculate the enthalpy change for the reaction CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l) ΔH°f [CH₄(g)] = -74.8 kJ/mol ΔH°f [O₂(g)] = 0 kJ/mol ΔH°f [CO₂(g)] = -393.5 kJ/mol ΔH°f [H₂O(l)] = -285.8 kJ/mol?

Given the following reaction and enthalpy values, calculate the enthalpy change for the reaction N₂(g) + 3H₂(g) → 2NH₃(g) ΔH°f [N₂(g)] = 0 kJ/mol ΔH°f [H₂(g)] = 0 kJ/mol ΔH°f [NH₃(g)] = -46.1 kJ/mol?

A gas has a volume of 3.0 L at a pressure of 1.5 atm. What will the pressure be if the volume is decreased to 2.0 L at constant temperature?

The figure below is the power curve during a squat. The size of the area indicated by the arrow indicates:

A high jumper completing a jump. Between the take off and the time she reaches the peak height, what happens to the total mechanical energy of the jumper’s body?