Anyone know how to do this please? It due really soon so help rn is appreciated:)

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?

Is this a single replacement reaction or there is no

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right