20 points!! Which numerical setup can be used to calculate the heat energy required to completely melt 100. grams of H2O(s) at 0°C?
A) (100. g)(334 J/g)
B) (100. g)(2260 J/g)
C) (100. g)(4.18 J/g•K)(0°C)
D) (100. g)(4.18 J/g•K)(273 K)

The length of a vector arrow represents its magnitude and the point represents its direction true or false apex

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.

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?