How many neutrons does element x have if its atomic number is 56 and its mass number is 161?

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

Which piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick

How do you lengthen a pattern piece? (family and consumer science, sewing)