25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 ml of solution. If sodium carbonate dissociates completely, molar concentration of sodium Ion, Na+ and carbonate ions, CO2–3 are respectively (Molar mass of Na2CO3 = 106 g mol

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25.3 g of sodium carbonate, Na₂CO₃ is dissolved in enough water to make 250 ml of solution. If sodium carbonate dissociates completely, molar concentration of sodium Ion, Na⁺ and carbonate ions, CO2–
3 are respectively (Molar mass of Na₂CO₃ = 106 g mol^–1)

1.90 M and 1.910 M

0.477 M and 0.0477 M

0.955 M and 1.910 M

1.910 M and 0.955 M

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A mixture of ethane and ethene occupies 41 L at 1 atm and 500 K. The mixture reacts completely with 10.3 mole of O₂ to produce CO₂ and H₂O. The mole fractions of ethane and ethene in the mixture are (R = 0.082 L atm K^–1mol^–1) respectively

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