Please help with number 186, due 7 am tomorrow

Noble gases are the most reactive elements on the periodic table. a. true b. false

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?

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest