Other Chemistry Answers

1. Laboratory experiment, 30. J of heat was added to a gas piston assembly as the piston did 75 J of work on it surroundings. Calculate triangle E for the system

2. A 15.0 g piece of graphite is heated to 100.0°C and placed in a calorimeter. The graphite releases 815.1 J of heat to reach a final temperature of 23.9°C. What is the specific heat of graphite?

3. Calculate the standard enthalpy of reaction for the reaction 2 Na(s) + 2 H2O(l)----> 2 NaOH(aq) + H2(g). Standered enthalpies of formation are -285.8 kJ/Mom for H2O(l) and -470.11 kJ/mol for NaOH(aq)

What is the difference between wet process and dry process of cement manufacturing.

What chemical compositions of betel leaves may react to oestrogen?

Ba2+O

In a spherical container with small holes around (a perforated bowl), suppose there is a CO2 generator at the middle. In which area would the most number of CO2 particles go out from the container? (Lower part? Upper part? No difference?) Does the molecular weight effect this movement?

In a circular container with small holes around, suppose there is a CO2 generator at the middle. In which area would the most number of CO2 particles go out from the container? (Lower part? Upper part? No difference?) Does the molecular weight effect this movement?

Why does CO2 go down in the upward displacement method, and why it doesn't it go down in the normal atmosphere?

Is fog corrosive? If yes, why? If no, why not?

Question 4 : Anthropogenic contribuion to desertification excludes _________
overgrazing
bush burning,
depletion of resources
land management
Question 9 : Burning of fossil fuel contributes _______ of carbon dioxide to the atmosphere.
0.7
0.5
0.6
0.8