All categories

3 years ago

Plasma often contains?

1 answer:

5 0

Plasma is the often forgotten component of blood. White blood cells, red blood cells, and platelets are essential to body function, but plasma also plays a crucial, and mostly unrecognized, job. It carries these blood components throughout the body as the fluid in which they travel.

You might be interested in

What is the electron configuration of a fluoride ion (F-) in the ground state?

GarryVolchara [31]

1522s22p? Is correct

7 0

3 years ago

Fernando places 50 mL of HCl in a 100 mL beaker and 50 mL of NaOH in a 100 mL beaker. he places them on a scale together and mea

olchik [2.2K]

Answer:

The correct options are:

B. The HCl is the solute.

D. The H₂O is the solvent.

E. This mixture conducts electricity.

Explanation:

For the preparation of the HCl solution, 10 mL of HCl and 40 mL of water were mixed.

The compound that is present in the solution in a smaller ratio is the solute and the other compount -present in higher ratio- is the solvent.

So, the solute is HCl and the solvent is water (H₂O). Furthermore, water is considered as an universal solvent (for most of the polar and ionic compounds). According to this, the following options are correct:

B. The HCl is the solute.

D. The H₂O is the solvent.

Then, a condition for a solution that is able to conduct electricity is the presence of ions in the solution. When HCl is dissolved in water, it dissociates in ions according to the following equilibrium:

HCl ⇔ H⁺ + Cl⁻

The ions H⁺ and Cl⁻ are electrically charged so the solution can conduct electricity. According to this, the following option is also correct:

E. This mixture conducts electricity.

7 0

3 years ago

The next 11 questions are related to the titration of 40.00 mL of a 0.0900 M acetic acid solution with 0.0700 M KOH. Assume that

liberstina [14]

Answer:

2.9 is the initial pH of the analyte solution.

Explanation:

The dissociation constant of acetic acid as per theoretical value = $K_a$

$K_a=10^{-4.756}=1.8\times 10^{-5}$

The initial concentration of acetic acid = c = 0.0900 M

$HAc\rightleftharpoons Ac^-+H^+$

initially

c 0 0

At equilibrium

(c-x) x x

The expression of dissociation constant :

$K_a=\frac{[Ac^-][H^+]}{[HAc]}$

$1.8\times 10^{-5}=\frac{x\times x}{(c-x)}$

$1.8\times 10^{-5}=\frac{x\times x}{(0.0900-x)}$

Solving for x:

x = 0.001264 M

$[H^+]=0.001264 M$

The pH of the solution :

$pH=-\log[0.001264]=2.898\approx 2.9$

2.9 is the initial pH of the analyte solution.

4 0

3 years ago

N a rate law, the rate constant, k, depends on which condition?

Tanya [424]

In a rate law constant K(kt), Depends only on Temperature.

Answer: would be Temperature, if temperature is constant, then rate law is constant.

Hope that helps!!!

6 0

4 years ago

An element A forms a compound AH3 with hydrogen. Another element B forms a compound BA2 with B. Given that the valency of hydrog

Hatshy [7]

Answer:

A - 3

B - 6

Explanation:

The valency of hydrogen atom is +1

The valancy of an atom of other element combining with the hydrogen atom can be determined from the number of associated hydrogen.

when H combines with A, three atoms of hydrogen are used. Thus the valency of element A is -3

Now B combines with two molecules of A whose valency is -3

The valency of B would be twice the valency of element A i.e 6

if hydrogen combines with B, then the compound formed will be BH6

8 0

3 years ago