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JEE Main 20203 SeptemberEvening Shift
Exam
JEE Main
Year
2020
Date
3 September
Shift
Evening Shift
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JEE Main 2020 · 3 September · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

0 . 023 × 10 ^ 22 molecules are present in 10g of a substance x ' '...

0.023×10220 . 023 \times {10}^{22} molecules are present in 10g10gof a substance x ' ' . The molarity of a solution containing 5g5g of substance 'x' in 2 L solution is _ _ _ _ _ _ _ _ _ \times {10}^{- 3}

Correct answer

25

Step-by-step solution

Number of mole ofX=6.022×10226.022×1023=10MolarmassofxX = \dfrac{6 . 022 \times {10}^{22}}{6 . 022 \times {10}^{23}} = \dfrac{10}{Molarmassofx}

So molar mass of x=100gx = 100g

Molarity =5100×2=0.025M= \dfrac{5}{100 \times 2} = 0 . 025M

Ans. 0.025M0 . 025M

M=25×10−3M = 25 \times {10}^{- 3}

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