<span>Coal is not a mineral. It is a sedimentary rock or, in the case of butiminous coal, a metamorphic rock. The answerers above are correct. Organic is probably the answer that is sought. Coal is more like a random arrangement of microcrystals of large organic molecules. The fact that it has a variable composition and structure also causes it to violate the standard definition of mineral.minerals are inorganic</span>
Answer:
4.002 mol is in 68.16 grams of NH3
Answer:
huh?? do u need ideas or sum?
Explanation:
Answer:
pH=pKa
pH=4.44
Explanation:
Since the titration occur between a weak acid and a strong base.
then at half -equivalence point, the pH of the solution is equals to the pKa of the weak acid.
Therefore, pH=pKa
Ka of weak acid=3.6×10^−5
To calculate the pKa of the weak acid using the express below;
pKa =- log(Ka)
pKa=−log(3.6×10−5)=4.44
From the question, the pKa of the solution is at half -equivalence point
Then,
pH=pKa
pH=4.44
Answer:
Dipole form on each bond between hydrogen and oxygen atom in water molecule because of the electronegativity difference
between hydrogen and oxygen.
Explanation : Electronegativity means attraction of shared pair of electron toward itself in the covalent bond. Those atoms having same electronegativity values, the shared electron remain in the center whereas those atoms having different electronegativity values, the shared pair of electron is attracted by the atom having high value of electronegativity. In water molecule, electronegativity of oxygen is higher so it attracts electron pair towards itself and forms negative pole and hydrogen aquire positive pole.