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3 years ago

Classify each of the following solids as ionic,metallic, molecular, network (covalent)or amorphous?

Chemistry

1 answer:

enot [183]3 years ago

8 0

Answer;

P4O10 - molecular solid

Graphite - network solid

Ammonium phosphate - ionic

Brass - metallic

SiC - network solid

Rb- metallic

I2 - molecular

LiBr- ionic

P4 - molecular

Plastic - amorphous

Si - network

Explanation:

An ionic solid is consists of a combination of two oppositely charged ions to yield a crystal lattice such as LiBr.

A covalent solid is one in whom the atoms of the molecule are held together by covalent bonds e.g I2.

Metals are held together by interaction of metal ions and a sea of electrons. This is called the metallic bond. Like SiC

A network solid consists of covalently bonded atoms held together by strong covalent bonds and the molecules in the solid state are held together by a continuous network of atoms.

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KonstantinChe [14]

Answer:

$m_{Cr_2O_3}^{actual}=62.4gCr_2O_3$

Explanation:

Hello!

In this case, according to the reaction:

$4Cr+3O_2\rightarrow 2Cr_2O_3$

We can see there is a 4:2 mole ratio between chromium and chromium (III) oxide, this, for the given 56.2 g of chromium, the theoretical yield of the oxide product is computed down below:

$m_{Cr_2O_3}^{theoretical}=56.2gCr*\frac{1molCr}{52.0gCr}*\frac{2molCr_2O_3}{4molCr} *\frac{151.99gCr_2O_3}{1molCr_2O_3} =82.13gCr_2O_3$

Now, considering the 76.0-% yield for this reaction, the actual yield turns out:

$m_{Cr_2O_3}^{actual}=82.13gCr_2O_3*\frac{76.0gCr_2O_3}{100gCr_2O_3} \\\\m_{Cr_2O_3}^{actual}=62.4gCr_2O_3$

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guapka [62]

Answer:

Explanation:

What the equation is tell you is that for every 3 mols of NO2 you get 2 mol of HNO3

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