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Murljashka [212]
3 years ago
12

Nyatakan tiga bentuk bagi atom karbon dan perbezaan ringkas diantara ketiga-tiga atom karbon tersebut

Chemistry
1 answer:
Montano1993 [528]3 years ago
3 0

Answer:

Berlian, grafit dan fullerenes.

Penjelasan:

Tiga bentuk atom karbon adalah berlian, grafit dan fullerenes. Ketiga-tiga atom karbon ini adalah bentuk atom karbon allotrophic. Perbezaan utama antara atom karbon adalah berikut:

Ketiga-tiga bentuk allotrophic mempunyai sifat kimia yang sama tetapi sifat fizikalnya berbeza antara satu sama lain. Berlian adalah yang paling sukar sementara grafit lembut. Dalam berlian, satu atom karbon berkongsi elektron dengan empat atom karbon yang lain sementara dalam grafit, satu atom karbon berkongsi elektron dengan tiga atom karbon dan fulleren adalah atom di mana satu atom karbon dihubungkan dengan beberapa atom karbon melalui ikatan kovalen. Ketiga-tiga atom karbon padat pada suhu bilik.

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How many grams of acetylene are produced by adding water to 5.00 g CaC2?
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Answer:

2.03125g of acetylene

Explanation:

First thing's first, we have to write out the balanced chemical equation;

CaC2(s) + 2H2O(l) → Ca(OH)2(aq) + C2H2(g)

Water is in excess, so CAC2 is our limiting reactant. i.e it determines the amount of product that would be formed.

1 mol of CaC2 produces 1 mol of C2H2

In terms of mass;

Mass = Number of moles * Molar mass

where the molar mass of the elements are;

Ca = 40g/mol

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CaC2 = 40+ (2*12) = 64g/mol

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64g (1 * 64g/mol) of CaC2 produces 26g ( 1mol * 26g/mol) of C2H2

5g would produce x?

64 = 26

5 = x

Upon solving for x we have;

x = (5 * 26) / 64

x = 2.03125g

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