Students know that young salmon in their area need streams with cold, clear water. The students heard that the trees in a forest above their town will be logged next year.
How could students test if the logging operation harms the health of their ecosystem?
O A. They can collect garbage along the stream banks and test the stream for pollution
OB. They can do an internet search for the effects of logging on the health of ecosystems.
O c. They can compare measurements of water temperature and cloudiness before and after the logging operation.
OD. They can make a questionnaire and ask people in their town if logging will be healthy or harmful for the ecosystem.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

i think its 100

i hope this !

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.