Apple juice has a lower ph than black coffee. which best explains the relationship?
a. apple juice has fewer hydrogen ions than black coffee.
b. apple juice has more hydrogen ions than black coffee.
c. apple juice has the same number of hydroxide ions as black coffee. d. apple juice has more hydroxide ions than black coffee.

Option B is the correct one.

Apple juice has more hydrogen ions than black coffee

Explanation:

An acid solution has higher [H⁺] and a lower [OH⁻]

pH = < 7

- log [H⁺] = pH

A basic solution has a higher [OH⁻], and a lowe [H⁺]

- log [OH⁻] = pOH

14 - pOH = pH

pH = > 7

For example Apple juice has [H⁺] =  0.03

pH = - log 0.03

pH = 1.52

Coffee has [OH⁻] = 0.03

pOH = 1.52

14 - 1.52 = 12.48 (pH)

Apple juice is more acid than coffee, thats why it has has more hydrogen ions than black coffee

B.) Apple juice has more hydrogen ions than black coffee.

Explanation:

YOUR WELCOME :)

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j