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fomenos
3 years ago
5

Who started sneakers

Chemistry
1 answer:
hodyreva [135]3 years ago
6 0
In late 18th century, people wore rubber soled shoes called plimsolls, but they weren't the best sneakers. Around 1892, a US company named Keds started sneakers with a canvas top and rubber soles. By 1917, these were mass produced.
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How is weed bad to smoke? And do you smoke?
gladu [14]

its very unneficient


7 0
3 years ago
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Identify the compound whose solubility decreases with increasing temperature.
Veronika [31]

Answer is: Na₂SO₄ (sodium sulfate).

The solubility of sodium sulfate increases up to 32.38°C and than decreases at higher temperatures, the solubility becomes almost independent of temperature.

At 32.38°C it releases of crystal water and melting of the hydrated salt.

Sodium sulfate is the white, inorganic compound.

Sodium sulfate is highly soluble in water.

5 0
3 years ago
The atomic mass of beryllium (Be) is 9.01 amu. The atomic mass of calcium (Ca), which is in the same group as beryllium, is 40.0
bekas [8.4K]
Mg will have a higher amu than Be but a lower amu than Ca.
8 0
3 years ago
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Gallium is a metallic element in Group III. It has similar properties to aluminium.
Liula [17]

Answer:

Gallium has Orthorhombic and forms ionic bonds with metals

Explanation:

The structure of gallium is Orthorhombic and it has a high neutron capture cross section. It is very stable in dry air but oxidizes in moist air. It reacts with oxygen to form Ga2O3. It has a valence of III. Its electronic configuration is  

Ar 3d10 4s2 4p1

It is found in the 3A group of periodic table and it mostly forms ionic bonds with metal.  

3 0
3 years ago
What is Chemical Bonding?<br>Explain please.​
olga nikolaevna [1]

Answer:

Chemical bonds are how atoms, and even molecules join together.

Explanation:

There are two main types of primary chemical bonds. While secondary links relate to molecules, primary ties are atom to atom. This answer explains basic primary bonds only.

One must comprehend what a valence shell is before I proceed. The outer electron orbital of an atom is known as the valence shell. Most of the time (except from hydrogen), atoms desire to have 8 electrons in their valence shell, thus they form bonds with other atoms to accomplish this.

<em>All bonds result in a new chemically different molecule. Now, the two types are:</em>

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3 0
1 year ago
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