If Avogadro number N _ A , is changed from 6.022 × 10 ^ 23 mo l ^ - 1 to 6.022 × 10 ^ 20 mo l ^ - 1 , this would change:

NEET 2015

Exam: NEET
Year: 2015
Subject: Chemistry
Chapter: Some Basic Concepts of Chemistry

NEET 2015 · Chemistry · Some Basic Concepts of Chemistry

If Avogadro number N _ A , is changed from 6.022 × 10 ^ 23 mo l ^ -...

If Avogadro number

{N}_{A}

, is changed from

6.022 \times {10}^{23}mo{l}^{- 1}

6.022 \times {10}^{20}mo{l}^{- 1}

, this would change:

Options

AThe definition of mass in units of grams
BThe mass of one mole of carbon
CThe ratio of chemical species to each other in a balanced equation.
DThe ratio of elements to each other in a compound.

Correct answer

B. The mass of one mole of carbon

Step-by-step solution

Mass of 1 mol $( 6.022 \times 1{0}^{23}atoms )$ of carbon = 12g

If Avogadro Number $( {N}_{A} )$ is changed then mass of 1 mol $( 6.022 \times 1{0}^{20}atom )$ of carbon

$= \dfrac{12 \times 6.022 \times 1{0}^{20}}{6.022 \times 1{0}^{23}} = 12 \times 1{0}^{- 3}g$

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