What volume of ammonia (NH3) will react completely with 25.0 liters of O2? 4 NH3 + 3 O2 ---> 2 N2 + 6 H2O

18,75 litres

Explanation:

4 NH3 + 3 O2 ---> 2 N2 + 6 H2O

n (NH3) : n (O2) = 4 : 3

<=>

V (NH3) : V (O2) = 4 : 3

Hence, V(O2) = 3 × V (NH3) ÷ 4 litres

V(O2) = 3 × 25.0 ÷ 4 litres

V(O2) = 75 ÷ 4 litres

V(O2) = 18,75 litres

If you have any questions, feel free to ask :)

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the dissolution of polymer can be thermodynamically described in 2 steps.