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Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are produced when 27.5g of sodium are added to water?

Respuesta :

Answer:

.598 moles of H2

Explanation:

Find the balanced equation of the reaction

2Na    + 2 H2 0  ====>  2  Na OH  +  H2

27.5 gm of Na is   27.5/ 22.989 =1.196 moles

from the equation, each mole of Na produces 1/2 mole of H2

  1.196 moles * 1/2 = .598 moles of H2

The reaction given by

  • 2Na+2H_2O—»2NaOH+H_2

Moles of sodium:-

  • Given mass/Molar mass
  • 27.5/23
  • 1.196mol

So

  • 2mol Na Produces 1 mol H_2
  • 1 mol Na Produces 0.5mol H_2
  • 1.196 mol Na Produces=0.5(1.196)=0.598mol H_2

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