Oxygen (O) is a gas at room temperature. Room temperature is 75° F. Which of the following statements is true? 1.) The melting point of oxygen is warmer than room temperature
2.) The boiling point of oxygen is warmer than room temperature
3.) The boiling point of oxygen is colder than room temperature
4.) The melting point of oxygen is above the boiling point

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy