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2 years ago

To fulfill the octet rule electron sharing leads to ____ electrons around each atom?

2 answers:

5 0

D. 8

You can predict it from it's name "Octet" means Eight. Atom must have that number of electron to have a stable structure!

Hope this helps!

Elanso [62]2 years ago

4 0

I believe the correct answer from the choices listed above is option D. To fulfill the octet rule electron sharing leads to 8 <span>electrons around each atom. From the word octet, you can directly say that the number 8 is involved here. Hope this answers the question.</span>

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Nistu is cooking rice in a pot. When she leaves the pot on the stove for a while, the temperature of the rice increases. What ha

Mila [183]

Answer:

Their average kinetic energy increases

Explanation:

The average kinetic energy of the rice molecules increases as the pot is left on the cooking stove.

Heat is transferred to the pot by conduction from the heat source. The heat is then transferred to the rice in the cooking pot by convection.

As the water in the pot heats up.
The rice gains thermal energy.
This causes the molecules of the rice particles to start vibrating.
As the molecules vibrate about their fixed position, their thermal energy continues to increase.
Therefore, the amount of heat absorbed by the rice increases with time and this actually cooks the food.

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2 years ago

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Why is calcium chloride (rock salt, CaCl2) more effective than sodium chloride (table salt, NaCl) at de-icing roads in the winte

Tema [17]

Answer:

The correct option is;

D. Calcium chloride breaks into 3 ions, while sodium chloride only breaks into 2 ions

Explanation:

To help melt the ice on icy streets, calcium chloride (CaCl₂) is a more preferred salt type to sodium chloride (NaCl) as when it dissociates into ions in the ice, it forms three ions: a calcium ion, Ca²⁺, and two chloride ions, 2 Cl⁻, while sodium chloride forms two ions: one sodium ion, Na⁺, and one chloride ion, Cl⁻

According to the freezing point depression equation, we have;

ΔT = $K_f$ × m × i

Where;

ΔT = Change in freezing point temperature

$K_f$ = The freezing point depression constant

m = The solution's molality

i = van't Hoff factor

The calcium chloride salt will cause the most depression because the van't Hoff factor is 3 for calcium chloride and 2 for sodium chloride.

7 0

3 years ago

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Which starch solution will decrease in volume as osmosis occurs?

iogann1982 [59]

For the following question(s), consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane.

Which of the following also occurs in this system?
There is a net flow of water from the 4% starch solution into the 10% starch solution

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3 years ago

HELP FOR FINAL

Dahasolnce [82]

Volume of CO₂ obtained : 13 L

<h3>Further explanation</h3>

Reaction

C₂H₅OH + 3 O₂ ⇒ 2 CO₂ + 3 H₂0 + 8842 Joules

moles of ethanol=0.28

From equation, mol ratio ethanol : CO₂ = 1 : 2, so mol CO₂ :

$\tt \dfrac{2}{1}\times 0.28=0.56$

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

Then volume of CO₂ :

$\tt V~CO_2=mol\times 22.4=0.56\times 22.4=12.544\approx 13~L$

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2 years ago

Why is it important for lens makers to know then density of the glass they are using??

vlada-n [284]

The density of a glass helps determine the weight of the optical assembly and, along with lens diameter, becomes critical for weight sensitive applications.

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2 years ago

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