What is the main purpose of scientific models

What mass of aluminum is produced by the decomposition of 5.0 kg Al2O3? How many moles of oxygen are produced?

Are all reversible reactions at equilibrium? explain why or why not.

A scientist who wants to date materials older than 40,000 years would most likely use.

What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?

How much 3.0M NaOH is needed to neutralize 30ml of 0.75M of H2SO4?

Sodium will react with oxygen to form sodium oxide. use the formula below to determine how many grams of sodium oxide will be formed if 46 grams of sodium are used in the reaction.

How many atoms in 2.8 mol of neon?

Which best explains why blood and the cytoplasm of cells are mainly composed of liquid water? a. Water is a common substance and is readily available. b. Water is an important transport and reaction medium. c.

Can you describe how mixtures relate to substances?

Read the list of substances. Rubber, Steel, Glass, Iron Which substances are likely to be attracted by a magnet? Steel and Iron Rubber and Iron Steel and Glass Rubber and Glass