When a drawing made with a black marker gets wet, the marker bleeds and more separates into several colors. What method of separation does this describe?

1. evaporation

2. distillation

3. filtration

4. chromatography

Which of the following has the greatest first ionization energy: F, Li, Rb, or Fr? A. Li B. F C. Rb D. Fr

Striking a rock with a hammer causes the mineral to break into cubes. This is a mineral property test measuring cleavage. A. True B. False

HBr + KOH - KBr + H20 In this reaction, the acid is HBr. КОН. KBr. НО answer is HBr

How demanding is lime and cement in our world's economy?

How much energy is released if 3705g of octane are burned

The type of nuclear decay an unstable nucleus will undergo depends on its ratio of neutrons to protons. The radioisotope cobalt-65 has a ratio of neutrons to protons of 1.41, which is too high for a nucleus of this size.

1.87 $/gal to dollars per liter, Express your answer using three significant figures.

What can a student do to increase the force of attraction of a magnet on an iron block?

Which elements can react to produce a molecular compound?

Who created the periodic table and in what year?