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DanielleElmas [232]
3 years ago
11

What are some facts about covalent bonding?

Chemistry
1 answer:
Nuetrik [128]3 years ago
6 0
<span>When two atoms come near each other, sometimes they stick together to make a molecule. One way they can stick together is by covalent bonding.</span> <span>In covalent bonding, the atoms are unstable because their outer rings of electrons aren't filled up. By sharing electrons with other atoms, these atoms can fill up their outer rings and become stable. In water, for instance, the oxygen atom needs two more electrons to be stable, and the hydrogen atoms each need one. When they get together, the oxygen atom shares one electron with each of the hydrogen atoms, and the hydrogen atoms each share one electron with the oxygen atom.</span> Now that the atoms have become stable, it's pretty hard to knock them back into being unstable again, so covalent bonds are strong and molecules that form with covalent (sharing) bonds are strong molecules. <span>Covalent bonding makes very strong connections between the atoms, so it's hard to break these molecules apart. On the other hand, molecules that join with covalent bonds aren't very much attracted to each other (unlike with ionic bonding), so they move freely around each other. That means that most molecules that form covalent bonds make either liquids or gases, like water and carbon dioxide. The main exception is metals, which hold together using covalent bonding but are still solids. That's why metals are so flexible and easy to melt so you can make them into different shapes.</span>
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Why can’t there be a temperature lower than absolute zero
Firdavs [7]
Atoms cannot physically get more compact (temperature lowering increases the space between atoms) At absolute zero, the atoms are as physically close together as allowed by the physical laws governing it.
7 0
3 years ago
6. Which of the following statements correctly describes what happens to the diaphragm during an
Crank
Answer is B.

As the diaphragm contracts and flattens, it increases the volume of the thorax where the lungs are located. This results in a decrease in pressure (Boyle’s Law, if you know it) that creates a pressure gradient from outside to inside. This is what causes air to move into the lungs.
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3 years ago
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Zac releases the air from a balloon. Which statement best describes what will happen to the air that was inside the balloon?
ad-work [718]
The correct answer is the last option. When <span>Zac releases the air from a balloon, it will expand to fill the room. It will not expand in the sense that molecules will be big but the molecules will be more spread out into the room and more air molecules will be present to fill the room.</span>
8 0
3 years ago
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A marble rolls off horizontally from the edge of table top 1.50 m above the floor. it strikes the floor 2.0 m from the base of t
GrogVix [38]

a. t=0.553 s

b. vox(horizontal speed) = 3.62 m/s

<h3>Further explanation</h3>

Given

h = 1.5 m

x = 2 m

Required

a. time

b. vo=initial speed

Solution

Free fall motion

a. h = 1/2 gt²(vertical motion=h=voyt+1/2gt²⇒voy = 0)

\tt t=\sqrt{\dfrac{2h}{g} }

t = √2h/g

t = √2.1.5/9.8

t=0.553 s

b. x=vox.t(horizontal motion)

\tt x=v_{ox}\times t

vox=x/t

vox=2/0.553

vox=3.62 m/s

3 0
2 years ago
Calculate the percent mass of sugar in mountain dew: The total mass of the mountain dew solution is 300g and there are 231 g of
s2008m [1.1K]

Answer:

c. 77 %

Explanation:

Percent mass (% mass) of solute = mass of solute/mass of solution × 100

According to this question, a mountain dew solution weighing 300grams contains 231 g of sugar. This means that:

% mass of sugar = 231g/300g × 100

% mass of sugar = 0.77 × 100

% mass of sugar = 77%.

4 0
2 years ago
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