Answer:
28,125 g
Explanation:
m(O₂) = 100 g
n(O₂) =M(O₂)/m(O₂)=32 gram per mole / 100 g = 0,32 mole
O₂ + 2H₂ ⇒ 2H₂O , n(H₂O) = 2 × n(O₂)
m(H₂O) = M(H₂O)/2 × n(O₂) = 18 grams per mole / 2 × 0,32 mole = 28,125 g
Answer:
The salt is Zn(NO3)2
When the residue is allowed to cool, its colour changes from yellow to white
The equation of the reaction is; 2Zn(NO3)2(s) --->2ZnO(s) + 4NO2(g) + O2(g)
Explanation:
Decomposition of Zn(NO3)2 is one of the routes by which ZnO is obtained. ZnO is a white insoluble powder which has a yellow colour when hot and a white colour when cold. It is an amphoteric substance used as a white pigment in paints and as a filler for rubber.
In a very pure form, it is used in cosmetic powders and creams as well as in medicinal ointments and lotions.
Also recall that NO2 is a brown gas and oxygen gas rekindles a glowing splint.
Answer:
Explanation:
cold and hot are temperatures
Answer:
B
Explanation:
Conifers live in cooler regions
