Sandy heated 20 grams of liquid hydrogen peroxide until it was completely broken down into liquid water and oxygen gas. Which of these best describes the total mass of water and oxygen that was produced? A more than 20 grams since heat was added
B 20 grams since no matter was added or removed
C less than 20 grams since oxygen gas is very light
D more than 20 grams since there are two new substances

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.

Light waves are as they pass through the

Calculate the concentration of all species in a 0.165 m solution of h2co3.