Use this equqation for the problem:4Al+3O2 - -> 2Al2O3 How many moles of oxygen are needed to completely react with 14.8 mol of Al?

What is an example of bias in media

What features make a question scientific, and why are some questions beyond the boundaries of scientific investigation? Be sure to include examples to support your answer.

A chemist boils off the water from 627 mL of a solution with a pH of 10.2. The only dissolved compound in the solution is NaOH. How much solid remains

Which of these is a molecule? a. Ca c. Na b. Mg d. H2O

Find the mean medium mode and range of this data 49 49 54 55 52 49 55

Which would not be classified as a pure substance?

According to Boyle's law, how would you reduce the volume of a gas? a. by decreasing its pressure b. by increasing its temperature c. by decreasing its temperature d. by increasing its pressure

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)