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3 years ago

8

How many oxygen atoms are present in a formula unit of calcium acetate?

1 answer:

julsineya [31]3 years ago

6 0

So we end up with a total of four oxygen atoms for this calcium acetate unit and guys that truly it for this one.

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Chlorine is a toxic, corrosive, reactive gas. Which representation (structural formula, electron dot structure, or three-dimensi

DanielleElmas [232]

electron dot structure

Explanation:

Chemical reactions are driven by transfer or sharing of electrons between two or more atoms. To show a specie that is reactive, a sound knowledge of the distribution of electrons in the atom is necessary.

The electron dot structure shows only chemical symbol of the element surrounded by dots which represents the valence electrons.
The chemical symbol represents the nucleus and all electrons except the valence ones.
The dots arranged on the four sides are called lone pairs. Those that are unpaired are called odd electrons.
Chlorine has 7 valence electrons in its outermost shell.
It is made up of 3 lone pairs and 1 odd pair of electron.
The odd pair accounts for the reason why chlorine is very reactive.
It will only require just one electron to join the odd pair so as to complete the octet and be like the noble gases.

Learn more:

lewis dot structure brainly.com/question/5248264

resonance brainly.com/question/6786947

#learnwithBrainly

6 0

3 years ago

How does a solution become supersaturated?

puteri [66]

Answer:

B.)dissolve more solute than you should be able to.

I hope this helps sorry if it doesn't

4 0

3 years ago

A quantity of 8.10 × 102 mL of 0.600 M HNO3 is mixed with 8.10 × 102 mL of 0.300 M Ba(OH)2 in a constant-pressure calorimeter of

victus00 [196]

Answer:

22.48°C is the final temperature of the solution.

Explanation:

Heat of neutralization of reaction , when 1 mol of nitric acid reacts= ΔH= -56.2 kJ/mol= -56200 J/mol

$Moles (n)=Molarity(M)\times Volume (L)$

Moles of nitric acid = n

Volume of nitric acid solution = $8.10\times 10^2 mL= 0.81L$

Molarity of the nitric acid = 0.600 M

$n=0.600 M\times 0.81 L=0.486 mol$

Moles of barium hydroxide = n'

Volume of barium hydroxide solution = $8.10\times 10^2 mL= 0.81L$

Molarity of the barium hydroxide= 0.300 M

$n'=0.300 M\times 0.81 L=0.243 mol$

$2HNO_3+Ba(OH)_2\rightarrow Ba(NO_3)_3+2H_2O$

According to reaction, 2 mol of nitric acid reacts with 1 mol of barium hydroxide .Then 0.486 mol of nitric acid will react with :

$\frac{1}{2}\times 0.486 mol=0.243 mol$ barium hydroxide.

Heat release when 0.486 mol of nitric acid reacted = Q

= ΔH × 0.486 = -56200 J/mol × 0.486 mol=-27,313.2 J

Heat absorbed by the mixture after reaction = Q' = -Q = 27,313.2 J

Volume of the nitric solution = 0.81 L = 810 mL

Volume of the ferric nitrate solution = 0.81 L = 810 mL

Total volume of the solution = 810 mL + 810 mL = 1620 mL

Mass of the final solution = m

Density of water = density of the final solution = d = 1 g/mL

$Mass=density\times Volume$

$m=1 g/ml\times 1620 ml=1620 g$

Initial temperature of the both solution were same = $T_1=18.46^oC$

Final temperature of the both solution will also be same after mixing= $T_2$

Heat capacity of the mixture = c = 4.184 J/g°C

Change in temperature of the mixture = ΔT = $(T_2-T_1)$

$Q=mc\Delta T=mc(T_2-T_1)$

$27,313.2 J= 1620 g\times 4.184 J/g^oC\times (T_2-18.46^oC)$

$T_2=22.49^oC$

22.48°C is the final temperature of the solution.

8 0

3 years ago

The rate at which light energy is radiated from a source is measured in which of the following units? A. Candela B. Angstrom C.

Bumek [7]

A. Candela

Tell me if I got it wright

5 0

3 years ago

Read 2 more answers

luda_lava [24]

Answer:D

Explanation:

4 0

3 years ago