1. Rocks are the toughest thing on earth that there is no single element could break them through?
2. The hardness of a rock decreases due to excessive
exposure in a changing weather temperature.​

Imagine that you own a property that is exactly 2.2 acres large. you want to sell your property, but your realtor tells you that you cannot sell your land by the acre. in order to sell your land you need to determine the area you own in units of square meters? given that there are 1.6 kilometers in 1 mile and 640 acres in 1 square mile, what is the area of land that you own in square meters square meters?

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?