The presence of which reactant is the best indicator of an oxidation-reduction reaction?.

Iwll give extra points to who gets this for ! what type of reaction is this? ?

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution