This element has nine more electrons than Technetium

List four observations that indicate that a chemical reaction may be taking place

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system

What is the independent variable in this investigation? mass volume sample number substance density