What is the most important thing this map shows you about the migration routes of early peoples to North America? How would you describe this route to other people? What time period is being shown?

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.