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3 years ago

SiO2 + 3C - SiC + 2CO

Chemistry

1 answer:

noname [10]3 years ago

6 0

Answer:

96g

Explanation:

To know the exact mass of carbon (C) to add to the reaction, we need to convert 8 moles of carbon (C) to grams.

This is illustrated below:

Molar mass of C = 12g/mol

Number of mole of C = 8 moles

Mass of C =..?

Mass = number of mole x molar mass

Mass of C = 8 x 12

Mass of C = 96g

Therefore, 96g of carbon (C) is needed.

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Name the following compounds:

HACTEHA [7]

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Na20 = Sodium oxide (leave it as is, it in emoerical form already)

BaS = Barium Sulfide (leave it as is, it in emoerical form already)

CuSO4 = Copper(II) sulfate = CuSO4 5H2O

Fe2O3 = Iron(III) oxide (leave it as is, it in emoerical form already)

HgCl2 = Mercury(II) chloride (leave it as is, it in emoerical form already)

KC2H3O2 = Potassium Acetate (leave it as is, it in emoerical form already)

Al(OH)3 = Aluminium hydroxide (leave it as is, it in emoerical form already)

Fe(NO3)3 = Iron(III) nitrate (leave it as is, it in emoerical form already)

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I'm am so sorry if this didn't help too much, I hope I did help, I in some way, have a wonderful day.

3 0

3 years ago

Which functional group does the molecule below contain? HIC H H=COH [

katrin2010 [14]

Answer:

$D. \ \ \ \text{hydroxyl}$

Explanation:

Alcohols are organic compounds that are composed of the hydroxyl function group ( $-\text{OH}$ ), bonded to a carbon atom of an alkyl or a substituted alkyl group. Hence, the functional group of alcohols is the hydroxyl group ( $-\text{OH}$ ).

According to the International Union of Pure and Applied Chemistry (IUPAC) nomenclature, alcohols are named by changing the -e ending of the name of the parent alkane to the suffix -ol.

For example, the alcohol molecule in the figure demonstrates a hydroxyl group bonded to a methyl group. Therefore, the name of the alcohol is methanol.

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2 years ago

A hydrogen-like ion is an ion containing only one electron. The energies of the electron in a hydrogen-like ion are given by the

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Answer:

The ionization energy (in kJ/mol) of the helium ion is 21,004.73 kJ/mol .

Explanation:

$E_n = -(2.18 10-18 J)\times \frac{Z^2}{n^2}$

Z = atomic mass

n = principal quantum number

Energy of the electron in n=1,

$E_1= -(2.18 10^{-18} J)\times \frac{4^2}{1^2}=-3.488\times 10^{-17} J$

Energy of the electron in n = ∞

$E_{\infty}= -(2.18 10^{-18} J)\times \frac{2^2}{\infty ^2}=0 J$

Ionization energy of the $He^+$ ion:

$I.E=E_{infty}-E_1=0-(-3.488\times 10^{-17} J)=3.488\times 10^{-17} J$

$I.E=3.488\times 10^{-20} kJ$

To convert in into kj/mol multiply it with $N_A=6.022\times 10^{23} mol^{-1}$

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Answer:

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Explanation:

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