Write the net ionic equation (photo)

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?

What is a metal replacement reaction

What is bromine+calcium iodide--> calcium bromide +iodine balanced