What are synonyms for the word control?

Answer:

The answer is D) All the above

Explanation:

The pH of the solution created is  7.21

Explanation:

Ka1 = 6.9 X 10⁻³

Ka2 = 6.2 X 10⁻⁸

Ka3 = 4.8 X 10⁻¹³

pKa = - log( Ka)

Thus,

pKa1 = - log ( 6.9 X 10⁻³) = 2.16

pKa2 = - log ( 6.2 X 10⁻⁸ ) = 7.21

pKa3 = - log ( 4.8 X 10⁻¹³ ) = 12.3

KH₂PO₄ + Na₂HPO₄ = KH₃PO₄ + Na₂PO₄

Ka2 = [ KH₃PO₄] [Na₂PO₄] / [KH₂PO₄] [Na₂HPO₄]

log (Ka2 ) = log [[ KH₃PO₄] [Na₂PO₄] / [KH₂PO₄] [Na₂HPO₄]]

pH = pKa2 + log [KH₂PO₄] /[Na₂HPO₄]  = 7.21

Therefore, the pH of the solution created is  7.21

The correct answer is conduction

Answer:

Option (A)

Explanation:

Radioactivity is defined as a process in which an unstable atomic nucleus decays continuously and after a specific period of time changes into a much more stable element. During this time of decay, the nucleus emits charged particles (energy) which are known as the α, β and γ particles. These are often emitted in the form of electromagnetic energy and are very dangerous to health.

The radioactive elements decay at a certain rate which is commonly known as the half-life. Half-life is basically defined as the time required by a radioactive substance to decay half of its initial composition.

Thus, the correct answer is option (A).