A student needs to dilute a 0.46 M Pb ( NO3 ) 2 solution to make 55.0 mL of 0.14 M Pb ( NO 3 ) 2 . Set up the calculation by placing the values with the correct units into the equation. Then, calculate the volume, in milliliters, of the 0.46 M Pb ( NO 3 ) 2 solution that is needed.

16.7mL

Explanation:

From the information provided, the following were obtained:

C1 = 0.46 M

V1 =?

C2 = 0.14M

V2 = 55mL

Using the dilution formula, (C1V1 = C2V2).., we can obtain the volume (V1) of original solution as follows:

C1V1 = C2V2

0.46 x V1 = 0.14 x 55

Divide both side by 0.46

V1 = (0.14 x 55) / 0.46

V1 = 16.7mL

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation: