The first-order decay of radon has a half-life of 3.823 days. how many grams of radon decomposes after 5.55 days if the sample initially weighs 100.0 grams? 83.4 g50.0 g36.6 g63.4 g16.6 g

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

What must be in balance for temperatures to remain constant?