I have a piece of copper containing 8.2E8 atoms and I need mass in kgI am given1 L, 1 mL, 1000 cm^3, 1000 g, 1 kg, 1 cm^3, 9 g Cu, 1 cm^3 Cu, 1 g Cu, 9.5E21 atoms Cu.

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)