Answer:
[OH-] = 6.17 *10^-10
Explanation:
Step 1: Data given
pOH = 9.21
Step 2: Calculate [OH-]
pOH = -log [OH-] = 9.21
[OH-] = 10^-9.21
[OH-] = 6.17 *10^-10
Step 3: Check if it's correct
pOH + pH = 14
[H+]*[OH-] = 10^-14
pH = 14 - 9.21 = 4.79
[H+] = 10^-4.79
[H+] = 1.62 *10^-5
6.17 * 10^-10 * 1.62 * 10^-5 = 1* 10^-14
The quantity is 1 mole of neon
The force of the swing.
Hoped I helped, and please tell me if I am wrong.
Answer: 7.608 x 10∧23
Explanation:
Using Avogadro's Number;
1 mole of Phosphorus (P4) molecule contains 6.02 x 10∧23 molecules.
∴ 0.316 mole of Phosphorus (P4) will contain; 0.316 x 6.02 x 10∧23 =
1.902 x 10∧23 molecules.
1 molecule of Phosphorus (P4) is made up of 4 atoms.
∴ 1.902 x 10∧23 molecules Phosphorus (P4) will contain :
1.902 x 10∧23 x 4 = 7.608 x 10∧23 atoms
0.316 mole of phosphorus contains 7.608 x 10∧23 atoms.
