How are exothermic and endothermic reactions linked in the process of refining metal ore?

If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-28 have?

How does breaking up a solid speed dissolving in a liquid? increases the surface areadecreases the surface areadecreases the pressureincreases the pressure?

What is the product of this chemical reaction? "Copper (II) Sulfate reacts with Potassium Iodide"

What is eutrophication

Which of the following is necessary for plants to exhibit phototropism? A. Gravity B. Touch C. Auxin D. Dormancy

In what ways are polyatomic ions like simple ions

How does oxygen obey the octet rule when reacting to form compounds? A) It gains electrons. B) It gives up electrons. C) It does not change its number of electrons. D) Oxygen does not obey the octet rule.

Which equation obeys the law of conservation of mass? A. 2Fe+3O2 - -> 2Fe2O3 B. 4Fe+O2--> 2Fe2O3 C. Fe+O2--> Fe2O2 D. 4Fe+3O2--> 2Fe2O3

Why do airbags fill evenly with gases?

In which of the following reactions will Kc = Kp? In which of the following reactions will Kc = Kp? (A) SO3 (g) + NO (g) ↔ SO2 (g) + NO2 (g) (B) 2 N2 (g) + O2 (g) ↔ 2 N2O (g) (C) 4 NH3 (g) + 3 O2 (g) ↔ 2 N2 (g) + 6 H2O (g) (D) 2 SO2 (g) + O2 (g) ↔ 2