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How many molecules are in 25.4 grams of dinitrogen pentoxide, N2O5?

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.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Adepositional also feature that forms where a stream enters a lake or an ocean is a