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3 years ago

How will the calcium atom shown below achieve an octet if it takes part in an ionic bond?

Chemistry

1 answer:

Lelu [443]3 years ago

8 0

Answer:

It will lose 2 electrons

Explanation:

Here we have a calcium atom, which has 20 electrons.

Those 20 electrons are in 4 shells. (2-8-8-2)

Saying there are 2 electrons in the valence shell (Shell N), to get to an octet with an ionic bond (with a group 16 element), those 2 electrons will have to go.

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Photo attached.<br> Equilibrium question.<br> I know that the answer is C, but why?

Karo-lina-s [1.5K]

Count the quantity of each particle in the container in each of the diagrams:

$\begin{array}{cccc} \text{H}_2 & \text{I}_2 & \text{HI} & \\3 & 3 & 0 & \text{as in figure i} \\2 & 2 & 2 & \text{as in figure ii} \\1 & 1 & 4 & \text{as in figure iii} \\1 & 1 & 4 & \text{as in figure iv}\\1 & 1 & 4 & \text{as in figure v} \\\end{array}$

The container appears to be of constant volume and thus the concentration of each species is directly related to the number of particle present. By definition, the system is in equilibrium once the relative concentration becomes constant, which is in this scenario achieved at the time point depicted in diagram iii. Thus the answer.

5 0

3 years ago

"A crosslinked copolymer consists of 57 wt% ethylene (C2H4) repeat units and 43 wt% propylene (C3H6) repeat units. Determine the

ch4aika [34]

Explanation:

Percentage ethylene by weight = 57%

Percentage propylene by weight = 43%

Suppose in 100 grams of polymer:

Mass of ethylene = 57 g

Mass of propylene = 43 g

Moles of ethylene = $\frac{57 g}{28 g/mol}=2.036 mol$

Moles of propylene = $\frac{43g}{42g/mol}=1.024 mol$

1 mole = $N_A =6.022\times 10^{23}$ molecules/ atoms

Units of ethylene = $2.036 mol\times N_A$

Units of propylene = $1.024 mol\times N_A$

a) Fraction of ethylene units:

$=\frac{2.036 mol\times N_A}{2.306 mol\times N_A+1.024 mol\times N_A}=\frac{509}{765}$

b ) Fraction of propylene units:

$=\frac{1.024mol\times N_A}{2.306 mol\times N_A+1.024 mol\times N_A}=\frac{256}{765}$

3 0

3 years ago

How do weak intermolecular bond strengths affect the melting and boiling point of a substance?

kobusy [5.1K]

Answer:

both melting point and boiling points are lower

this is because it becomes easier to break those bonds (they’re actually intermolecular forces) between the atoms sinc they’re weak, and thus require less energy to break.

3 0

3 years ago

What is Homogeneous?

Delicious77 [7]

Answer:

Explanation:

Hope that helps if not lmk have a wonderful day!