Tính thể tích gần đúng ra ml của nguyên tử X nếu đường kính hạt nhân là 2*10-5 nm (Cho đường kính
nguyên tử gấp 10^{4}[/tex]
lần đường kính hạt nhân và công thức tính thể tích là V = 4/3r
3
.

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.