Answer:
4.816x10²⁴atoms
Explanation:
the number of moles of oxygen is 8
let x be number of oxygen atoms
recall that 1 mole=6.02x10^23 atoms
therefore, 8 moles =x
cross multiply
8 x 6.02 x 10^23 = x
x = 4.816 x 10²⁴atoms
The compound HF is an acid. This is because it dissociates in water to give hydrogen ions (H⁺) as the only positively charged ions.
The others dissociate as follows: NH₃ reacts with water to form an alkaline solution NH₄OH.
LiF dissolves to form an ionic solution
KOH dissociates in water to form an alkaline solution.
Answer: the pH is 11.78
Explanation:Please see attachment for explanation
To make sure no cracks are in the crucible and also to remove any moisture present in the crucible by the process of heating.
