A balloon filled with helium floats in the air. What does this tell you about the density of helium?

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

At element makes up all organic compounds?

In a chemical reaction, the final amount of the products is determined by the a. universal gas law b. law of definite proportions c. air pressure d. temperature e. none of the above me