The atom of an element has six protons and eight neutrons. The number of electrons in this atom is neutral is

Rainbow [258]

Relaxing into the breath
Exhaling
Soothing thoughts
Pulling new air inside
Inhaling
Repeat
All the oxygen to your brain
Taking your time
Intermittent
Onwards and upwards
Nice and deep

7 0

3 years ago

A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and

MAVERICK [17]

Answer:The ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = $K_a=1.8\times 10^{-4}$

Concentration of HA= 0.5 mM

Concentration of $A^-$ = 0.1 mM

pH = 6.16

First we have to calculate the value of $K_a$ .

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[A^-}{[HA]}$

Now put all the given values in this expression, we get:

$6.16=pK_a+\log (\frac{[0.1]}{0.5})$

$pK_a=6.86$

To calculate the ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

$7.02=6.86+\log \frac{[A^-]}{[HA]}$

$\frac{[A^-]}{[HA]}=1.44$

$\frac{[HA]}{[A^-]}=0.69$

Thus the ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02 is 0.69

7 0

3 years ago

In organ transplantation what is the most important biochemical match?

My name is Ann [436]

it would be blood hope this hrlped

4 0

4 years ago

The most diverse biomass is found in which two biomes_______?<br> What are the biomes?

snow_tiger [21]

Answer: The most diverse biomes are found in the tropical rain forest and the ocean.

hope this helps!! :D

4 0

4 years ago

Read 2 more answers

It would be most difficult for the body to maintain homeostasis if over several days someone had an inadequate intake of:_______

Liula [17]

If someone had an inadequate intake of sodium over several days, it would be most difficult for the body to maintain homeostasis.

<h3>Why is sodium important for homeostasis? </h3>

Most of the sodium in our body is present in the extracellular fluid (ECF). The concentration of sodium in the body is measured relative to the amount of water in the body.

Maintaining proper sodium concentration is therefore essential for maintaining water balance in the body. It also helps in the proper functioning of neurons by assisting in the conduction of impulses.

Sodium concentration is also important for muscle contraction. Proper sodium concentration maintains osmolality of the extracellular fluid which maintains the volume of blood and plasma in the body.

Therefore, an inadequate intake of sodium, over several days will affect the homeostasis of the body.