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laila [671]
3 years ago
14

A screw is made up of

Chemistry
1 answer:
tatuchka [14]3 years ago
5 0
I believe it is treads
You might be interested in
Compare the 3 types of bonds based on what happens to the valence electrons of the atoms
uysha [10]
In ionic bonds, one atom gives one or more electrons to another atom so both can get closer to 8 valence electrons.  Example:  In potassium chloride (KCl), Potassium gives up one valence electron to chlorine, so that the outer shell of potassium has 8 valence electrons.  This happens only between metals and nonmetals.

In covalent bonds, atoms share their electrons to reach 8 valence electrons.  Example: In water (H2O), Oxygen shares one valence electron with one atom of hydrogen, and another valence electron with another atom of hydrogen.  Oxygen now has 8 (4 unshared + 2 of its own + 1 from hydrogen + 1 from hydrogen), and each hydrogen has 2 valence electrons: one of its own and one from oxygen [ note that hydrogen only needs 2 valence electrons to be complete instead of 8].

In metallic bonds between metals, the valence electrons move much more freely than in other bonds.  This free characteristic makes metals how they are: ductile, malleable, sectile, conductive, etc.
7 0
3 years ago
At standard temperature and pressure, the element with the chemical symbol _______ is a liquid.
Bezzdna [24]

The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg). Although, elements caesium (Cs), rubidium (Rb), Francium (Fr) and Gallium (Ga) become liquid at or just above room temperature.

5 0
4 years ago
Grape soda is a solution of the solutes carbon dioxide (CO2), sugar (C12H22°11), and grape flavoring (CHNO2) dissolved in
ser-zykov [4K]

Answer:

The ameliorated retort, pertaining to the presented and contemporaneous interrogate is acknowledged as B.  

Explanation:

To convey such rhetoric, the following is obligated for comprehension:

- To commence, according to Wikipedia, a "Pure Substance" is defined as: "A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds."

- In addition, invariantly according to Wikipedia, a "Chemical Mixture" is defined as: "In chemistry, a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids."

Hence, veracious retorts are subject to commence.

Given peculiar substances,

H20, an optical isomer is in recognition as a pure substance.

Likewise, CO2, an enantiomer is in the congruence of a pure substance.

Hence, methyl anthranilate acquiring a chemical formula of C8H9NO2, acknowledged as grape flavoring, is a mixture.

Invariantly, the diasteromer epimer, procuring a chemical formula configuration of C12H22O11, sucrose, is acknowledged as a mixture.

Hence, ideologically, the retort in the congruence of veracious philosophy is B. "The pure substances are carbon dioxide and water; mixtures are sugar and grape flavoring."

I hope this helps!

8 0
3 years ago
Arrange the following compounds in order of increasing acidity, and explain the reasons for your choice of order. Enter your ans
NNADVOKAT [17]

Answer:

(a) > (d) > (c) > (b)

Explanation:

Acidic character is based upon inductive effect of the functional group that are attached to parent chain.

1. Nitro is a -I group which makes phenol acidic due to increased resonance,  2. bromine is a -I group but it is weaker than nitro group

3. phenol is more acidic than cyclohexanol due to resonance stabilization of resonance and among halogen F>Cl>Br>I is the order of acidity

4. cyclohexanol will be weakest as  it is not associated with any -I groups here.

so the order of acidity will be

(a). 4-nitropheno >  (d). 4-bromophenol > (c). 2,6-difluorocyclohexanol  >               (b). cyclohexanol

6 0
3 years ago
A chemist wade out 5.96 grams of barium calculate the number of moles of barium she weighed out
PilotLPTM [1.2K]

Answer:

0.04 mol

Explanation:

Given data:

Mass of barium = 5.96 g

Moles of barium = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of barium = 5.96 g/ 137.33 g/mol

Number of moles = 0.04 mol

Thus the number of moles of barium in 5.96 g are 0.04 moles. The chemist weight out the 0.04 moles .

7 0
4 years ago
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