Which of the following represents a pair of isotopes

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

*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

0.09 moles of sodium sulfate in 12 ml of solution