Molarity of pure water is:
Correct answer: D. 55.5
- A. 1
- B. 18
- C. 36
- D. 55.5
Explanation
Molarity is defined as the number of moles of the solute per liter of solution. We know that the density of water is 1g/ml or 1 Kg/ L. Therefore, the mass of 1L of water is 1kg or 1000gm So now to find out the number of moles in the 1kg of water we can use the formula for mass to find out no. of moles in 1L(molarity). No.of moles=1000gm/18gm=55.56 mol 55.56 is thus the molarity of pure water.
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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