Using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]) = 4.74 + log(1) = 4.74.

At 25°C, the pH of a neutral solution is 7.

HCl and NaOH neutralize each other, resulting in a neutral solution with pH = 7.

HCl and NaOH neutralize each other, resulting in a neutral solution with pH = 7.

Na2CO3 is a salt of a weak acid (H2CO3) and a strong base (NaOH). The pH can be estimated using the hydrolysis of CO3^2- which gives a pH around 11.0.

Using the formula for weak acids, pH = 0.5(pKa - logC) = 0.5(4.00 - log(0.01)) = 5.00.

pH = -log[H+]. pH = -log(0.001) = 3.

pH = -log[H+] = -log(1 x 10^-3) = 3.

pH = -log(0.00001) = 5.

pH = -log[H+] = -log(1 x 10^-7) = 7.

Normal human urine typically has a pH range of 6.0 to 7.0, which can vary based on diet and health.

θ = tan⁻¹(X/R) = tan⁻¹(40/30) = 53.13°.

In a purely resistive circuit, the voltage and current are in phase, so the phase difference is 0°.

In a purely resistive circuit, the voltage and current are in phase, so the phase difference is 0°.

At resonance in a series RLC circuit, the phase difference between voltage and current is 0°.

In phase means the phase difference is 0 radians.

If two particles are executing simple harmonic motion in the same direction with the same amplitude and frequency, their phase difference is 0.

If they have the same frequency and direction, the phase difference is 0.

Phase difference (Δφ) = 2π × (distance / wavelength) = 2π × (1/4) = π/2 rad.

If two particles are in phase, the phase difference is 0 radians.

The phase difference between two particles in the same phase of oscillation is 0 radians.

The phase difference between two points separated by half a wavelength is π radians.

The phase difference Δφ is given by Δφ = (2π/λ) * Δx. For Δx = λ/4, Δφ = (2π/λ) * (λ/4) = π/2 rad.

The S phase (Synthesis phase) is where DNA replication occurs, resulting in the duplication of chromosomes.

The G1 phase is the first stage of interphase where the cell grows and prepares for DNA replication.

Refraction is the bending of light as it passes from one medium to another due to a change in its speed.

The phenomenon where one gene affects the expression of another gene is called epistasis.

The bending of light as it passes from one medium to another is called refraction.

The bending of light when it passes from one medium to another is called refraction.

The pKa of acetic acid is approximately 4.76.