Answer:
FeS + O2 - Fe,02 + SO2
Explanation:
You have to see that no of Atoms are equal on both sides or not.
FeS + O2 - Fe,02 + SO2
Ferrous is balanced on both sides and also sulphur but oxygen is not balanced .
Ino left side oxygen is 2 while on right it's 4.
So, we have to balanced Oxygen.
FeS + 2O2 - Fe,02 + SO2
Now see it's balanced (we insert 2 on left side to balance the oxygen)
Answer:
1.125 moles of hydrogen are needed.
Explanation:
Given data:
Number of moles of ammonia formed = 0.75 mol
Number of moles of hydrogen needed = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
NH₃ : H₂
2 : 3
0.75 : 3/2×0.75 = 1.125 mol
1.125 moles of hydrogen are needed.
After reacting, place a red moist litmus paper into the final solution and the litmus paper will turn blue. This indicates that the solution is alkaline.
Alternative methods
Using universal indicator
using phenophtalein
using bromothyl blue
using methyl orange
use pH probe connected to a data logger
C. both a physical and chemical change occur.
Light. ever heard of moon cycles? so d and c are out of the question. and although almost non-existent, the moon does have gravity. only thing the moon doesn't have is light emitting from itself
