Coal is mainly made of carbon and there’s oxygen in the air so this burns to produce carbon dioxide. Breathing it can really hurt your lungs.
1. John Locke
Just learned about this in global lol
Answer:
Explanation:
1. Write the unbalanced equation
X + N₂ ⟶ X₃N
2. Balance the equation and gather all the data.
MM: 28.01
6X + N₂ ⟶ 2X₃N
m/g 1.486 1.000
3. Calculate the moles of N₂
4. Calculate the moles of X
The molar ratio is 6 mol X: 1 mol N₂
5. Calculate the molar mass of X
6. Identify X.
Radiometric dating is not useful to directly determine the age of an igneous rock. It is a technique used todate<span> materials such as rocks or carbon, in which trace </span>radioactive<span>impurities were selectively incorporated when they were formed. Hope this answers the question. Have a nice day.</span>
From Henderson-Hasselbalch equation:
PH = Pka + ㏒[conjugate base / weak acid]
when C2H3O2 is the conjugate base
and HC2H3O2 is the weak acid
so,
PH = Pka + ㏒[C2H3O2]/[HC2H3O2]
by substitution:
4.34 = 4.74 + ㏒[C2H3O2][HC2H3O2]
∴[C2H3O2]/[HC2H3O2] = 0.4