Explain how molecules can just be elements or compounds

Based on the experimental results, which solvent provided the second best separation of the analyte? a. 0.5% nacl solution b. vinegar c. 0.2% nacl solution d. all solvents had the same degree of separation e. distilled water f. 70% isopropyl alcohol

Chlorophyll reflects which of these colors? a. red b. blue c. green d. yellow

4. What is the "enemy" of DNA?

Visible light travels at a speed 3.0 * 108 of m/s. If red light has a wavelength of 6.5 * 10-7 m, what the frequency of this light?

Calculate the molar solubility of fe (oh) 2 in pure water. (the value of ksp for fe (oh) 2 is 4.87*10-17.)

To be considered a source of water pollution, the source must include a chemical.

2,000 kJ worth of heat is absorbs by each of the following objects. Which object will experience the smallest temperature change

How are real gases different from ideal gases?

Which one doesnt belong in the list below? A. a meter B. one liter C. One centimeter D. one kilometer

Which elements did curies discover