Awhite powder, when heated, produces a colourless gas and a black solid. is the white powder an element? i need reasons : )

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

What is the average rate of the reaction between 10 and 20 s?

If maltose undergoes hydrolysis what subunits does it results to?