Question

9 If one mole of carbon atom weights 12 gram , what is the mass of one atom of carbon?

Answer 1

Given :-

• One mole of carbon atom weights 12 grams.

To find :-

• The mass of one atom of carbon

Solution :-

Mass of 1 mole of carbon atom = 12g

$\rm\:6.022\times\:{10}^{23}\:carbon\:atom= 12g$

$\rm\:mass\:of\:1\:carbon\:atom=\dfrac{12}{6.022\times\:{10}^{23}}$

$\rm\:mass\:of\:1\:carbon\:atom=\dfrac{12\times\:1000}{6022\times\:{10}^{23}}$

$\rm\:mass\:of\:1\:carbon\:atom=\dfrac{\cancel{12}000}{\cancel{6022}\times\:{10}^{23}}$

$\rm\:mass\:of\:1\:carbon\:atom=\dfrac{6000}{3011\times\:{10}^{23}}$

$\rm\:mass\:of\:1\:carbon\:atom= 1.99\times\:{10}^{-23}\:g$

Hence,the mass of one atom of carbon will be $\rm\:1.99\times{10}^{-23}\:g$

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➝ Molar mass :- The molecular mass of a substance is a number which indicates how many times the mass of one molecule of carbon the substance is heavier than the mass of 12 part of C¹²

➝ Mole :- According to mole concept mole is a unit which expresses 6.022 × 10²³ particles.

Answer 2

Answer:

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