7. What is it called when you get the mass of a container on the balance before getting the mass of the container plus a sample?

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

56 moles of   lieter in chemistry