Answer:
f = 1.87 × 10¹⁹ s⁻¹
Explanation:
Given data:
Wavelength of light = 1.6 ×10⁻¹¹ m
Frequency of light = ?
Solution:
Formula:
speed of light = wavelength × frequency
Frequency = speed of light / wavelength
speed of light = 3× 10⁸ m/s
Now we will put the values in formula:
Frequency = speed of light / wavelength
f = 3× 10⁸ m/s / 1.6 ×10⁻¹¹ m
f = 1.87 × 10¹⁹ s⁻¹
A heterogeneous mixture is a mixture in which its components retain their identity. The correct answer is B.
Answer: 0.001 M
Explanation:
pH is the negative logarithm of hydrogen ion concentration in a solution. Mathematically, pH is expressed as
pH = -log(H+)
where H+ is hydrogen ion concentration
So, 3 = -log(H+)
(H+) = Antilog (-3)
(H+) = 0.001
Thus, [H+] concentration is 0.001 M