The table shows hardness data for four mineral samples. Mohs Hardness Scale compares mineral hardness to everyday items. Mineral Hardness Data Mineral Sample Mineral Scratches Mohs Hardness Scale Fingernail Penny Iron Nail Fingernail 2.5 1 No No No Copper Penny 3.5 2 Yes Yes No Nail 4.0 3 Yes Yes Yes Glass 5.5 4 Yes No No Steel File 6.5 Based on the data, which mineral sample number has a hardness greater than 4.0?

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:

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.