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masha68 [24]
4 years ago
9

How many covalent bonds are there in one molecule of silica, SiO2?

Chemistry
2 answers:
Eva8 [605]4 years ago
8 0
four covalent bonds in SiO2
WARRIOR [948]4 years ago
6 0
There are 4 covalent bonds in one molecule of silica
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The density of seawater is 1.025 g/ml what is the mass of 100,000 ml of seawater in grams
melamori03 [73]
D = m / V

1.025 = m / 100,000 mL

m = 1.025 x 100,000

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3 years ago
A gas sample occupies 4.2L at a pressure of 101 kPa. What volume will it occupy if the pressure is increased to 235 kPa
taurus [48]

1.8 L

<h3>Explanation</h3>

The volume of a gas, V, is inversely proportional to the pressure on it, P. That is:

V₁ · T₁ = V₂ · T₂.

Rearranging gives:

V₂ = V₁ · T₁ / T₂ = 4.2 × (101 / 235) = 1.8 L

4 0
3 years ago
Why are lightning formed in clouds?
VladimirAG [237]

Explanation:

Because opposites attract, the negative charge at the bottom of the storm cloud wants to link up with the ground’s positive charge. Once the negative charge at the bottom of the cloud gets large enough, a flow of negative charge called a stepped leader rushes toward the Earth. The positive charges at the ground are attracted to the stepped leader, so positive charge flows upward from the ground. When the stepped leader and the positive charge meet, a strong electric current carries positive charge up into the cloud. This electric current is known as the return stroke. We see it as the bright flash of a lightning bolt.

Thunder and lightning occur at roughly the same time although you see the flash of lightning before you hear the thunder. This is because light travels much faster than sound

3 0
3 years ago
Giving brainly if correct and explained​
kupik [55]

Answer:

D.

Explanation:

A concentrated solution is one that has a lot of solute (the substance being dissolved) in the solvent (the substance doing the dissolving). When a solution is concentrated, it means it has a high ratio of solute to solvent, so the answer is D.

Hope this helps.

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2 years ago
How many moles of HCl are needed to react with 0.87 mol Al?
WARRIOR [948]
The answer is ( 2.6 mol HCl )
5 0
3 years ago
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