Which criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension? 
whether its composition is uniform and transparent whether the particles remain suspended for an extended period of time
whether it can be separated into simpler substances through physical separation techniques
whether the ratio of components is fixed

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

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.

How many moles of oxygen react with 12 moles of aluminum