Answer:
natural income
Explanation:
Living sustainably in the 21st century means coexisting with the nature. In other words, to live sustainably means to meet the needs of the human without affecting or degrading the mother nature.
In the context, living sustainably means to live from the natural income from the nature's gift to us, using their natural resources and not hurting them or exploiting them. They may be resources from the soil, plants, clean air, animals, nature's clean water,etc.
Explanation:
In normal atmosphere, analytical reagents may absorb water molecules that may affect the results of chemical reactions. So, in order to get accurate results from these analytical regents, they must be stored in a dessicated atmosphere or heated before being used so that the water molecules must dry away.
Answer : The rate of consumption of oxygen = 0.245 mol/s
Solution : Given,
Rate at which Hydrogen burns = 0.49 mol/s
The Reaction is,

In this reaction, 2 moles of hydrogen react with the 1 mole of oxygen.
The rate at which oxygen burns is equal to the half of rate at which hydrogen burns.
Rate at which Oxygen burns =
× 0.49 mol/s
= 0.245 mol/s
The unbalanced equation is:
Fe(s) + O2(g) —> Fe2O3(s)
To balance oxygens, multiply O2 by 3 and Fe2O3 by 2.
Fe(s) + 3O2(g) —> 2Fe2O3(s)
Balance your iron by multiplying Fe by 4, since you have 4 Fe in the products now.
4Fe(s) + 3O2(g) —> 2Fe2O3(s)
Athletic physical therapy.
This involves helping athletes recovering from surgery with rehab so they can get back into the game.