Calculate the empirical formula for each of the following stimulants based on their elemental mass percent composition.

adenine (a nucleobase (a purine derivative) with a variety of roles in biochemistry) : C 44.44%, H 3.73%, N 51.83%

If a large bowl of soup and a small cup of soup have the same temperature of 80F. Which has more heat and why (Science problem)

The progress of the reaction: H2 (g) + Br2 (g) ↔2HBr (g) can be monitored visually by following changes in the color of the reaction mixture (Br2 is reddish-brown, and H2 and HBr are colorless). A gas mixture is prepared at 700 K, in which 0.

What would be the product formed if 6-ethyl-2-methyl-3-octyne were reacted with two equivalents of hbr?

If the following equation is properly balanced, what are the coefficients in front of each compound? Fe2O4 + SO2 → FeS + O2 1. 1; 2; 1; 2 2. 2; 2; 2; 5 3. 2; 1; 1; 4 4. 1; 2; 1; 4 5. 1; 2; 2; 4 6. 2; 2; 1; 5 7. 2; 2; 1; 4 8. 1; 1; 1; 1 9. 2; 1; 2; 4

In a combustion engine, fuel is burned to produce mechanical energy. Which of the following shows that an energy transformation has taken place? OA. heat is produced OB. there is no change OC. matter is created OD.

What are two fungal skin infections that humans can contract? pneumonia and ergot disease ergot disease and athlete's foot athlete's foot and ringworm ringworm and pneumonia

A critical biotic factor in Yellowstone National Park is A) geographic isolation B) high elevation C) high temperature in the summer D) population of wolves E) proximity to water

If energy can neither be created nor destroyed in a chemical reaction, what can happen to the energy

Effect of ph on conformation of aplha helix

How can we tell when something is polar or non-polar in an Inter-molecular Force?