How many liters are in 4.5 moles of CO2 gas at STP? Pls help :)

A+b→2c when the reaction begins, the researcher records that the rate of reaction is such that 1 mole of a is consumed per minute. after making changes to the reaction, the researcher notes that 2 moles of a are consumed per minute. what change could the researcher have made to effect this change?

Air can be considered a mixture. which statement does not explain why?

Why do lunar and solar eclipse not happen every month