HBr + H2SO4 = SO2 + Br2 + H2O
Did S change oxidation number?

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 problem would a person have if the nucleic acid in one of his or her cells were damaged?

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared