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3 years ago

CO3Draw LewisStructureCO2

1 answer:

7 0

CO2 = 4+6(2)
= 16
This means there is a total of 16 valance electrons.

1. Choose least electronegative atom in this case C and put it in the center

2. Put oxygen around it

Eg.

O-C-O

Remember one line equals two electrons.

Put electrons around each atom until full.
Hard to show without drawing. Hope that helps

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Iodine 131, cesium 137, and strontium 90 are all considered isotopes. What are isotopes?

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Answer:

Isotopes are variants of an element, where the number of neutrons is different but its number of protons stay the same.

Explanation:

If the number of protons had changed then it would just be a different element.

Electron number changing simply adds charge to the atom, and doesn't change it or anything.

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3 years ago

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T/F___ At the eutectic composition, an alloy can solidify at a constant temperature.___ For effective dispersion strengthening,

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Answer:

TRUE
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TRUE
FALSE
FALSE
TRUE

Explanation:

At the eutectic composition, an alloy can solidify at a constant temperature : TRUE . this is because at eutectic composition the type of reaction that takes place there is invariant reaction in its thermal equilibrium
For effective dispersion strengthening, the dispersed phase should be needle-like, as opposed to round : FALSE. because the rounded shape will not cause a crack.
Intermetallic compounds are usually hard and brittle : TRUE. because Intermetallic compounds prevents dislocation movements and this makes them brittle and hard
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Stoichiometric intermetallic compounds exist over a range of compositions : FALSE
Faster solidification results in smaller interlamellar spacing : TRUE

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3 years ago

All the elements of a family in the periodic table have what feature in common?a)they all have similar chemical properties.b)the

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<span>Answer: D. They all have the same number of electrons in the electron cloud</span>

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AlladinOne [14]

Answer:

The "2" applies only to the sodium, and sugar is a substance

Explanation:

The amount of atoms in an element are written using small letters after the element they refer to.

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3 years ago

Which of the highlighted carbon-oxygen bonds absorbs at a higher wavenumber in an IR spectrum?

skelet666 [1.2K]

Answer:

1. bond in the molecule on the right

Explanation:

CH3CH2-OH

The compound above is an alcohol due to the presence of the OH bond. The wave number of the C - O bond is given as; 1050-1150 cm^-1.

CH3CH__O

The compound above is an aldehyde due to the presence of the CHO bond. The wave number of the C = O bond is given as; 1740-1720 cm^-1

Comparing both bonds, the C = O bond absorbs at a higher wave number.

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3 years ago

CO3Draw LewisStructureCO2​

CO3Draw LewisStructureCO2