Why do food scientists need to understand chemistry? A. They use chemicals as flavorings and preservatives.
B. They use complicated machines to produce food products.
C. They study how to make plants produce certain chemicals.
D. They study the effects of different foods on the body.

c (diamond),

sio2 (quartz)

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.

c. electrical charges of ionic bonds.