Could you please add the choices, so I can use those?
Answer:
minutes
Explanation:
For a First order reaction, the rate constant is determined by

Where
k= rate constant
t= time required for a reaction
a= initial concentration
x= amount of reactant decomposed in time t
a-x= amount of reactant left after time t
Let the initial concentration be 
Then

Substituting the given values in above equation, we get -


Also,

minutes
Read more on Brainly.in - https://brainly.in/question/6804668#readmore
Answer:
Rocks
Explanation:
Rocks normally stop streams
Because of the nitrogen cycle all of the above answers are correct
'Getting yourself a snack where you are hungry is an example of' listening to your body. You are also allowing yourself to not starve. Find healthy snacks to keep your body nutrition.