How man moles of Al2O3 are formed in the reaction 4Al (s) + 3O2 (g) 2Al2O3 (s)

A teacher wants to preform a class room demonstration that illustrates both chemical and physical changes. which would be the best demonstration she could use

A solution that contains the maximum amount of solute that is soluble at a given temperature is said to be -

Which of the following terms means weak sphere

Marine ecosystems support a diversity of life, largely due to throughout the ocean.

If a patient requires 30g/day of some medication and it comes in 500 mg tablets, how many tablets does this patient need in one day?

Which of the following is the most likely description of the product or products of a double-displacement reaction? A) one new compound B) two new compounds C) oxygen and energy D) one new compound and an element

A balloon is filled with 12L of air at a pressure of 2 atm. What is the volume of ballon if the pressure is changed to 3 atm?

What ionic bond occurs between what particles? A. Two Negative Ions B. A positive and negative ion C. Two positive ions D. Two neutral atoms

Which of the following are good traits of a hypothesis? it will be able to be tested it can predict an outcome it will explain the observations all of these

What is the mass of a box of nails