Ask Question
25 October, 21:39

In each of the following, how many moles of each element or compound are present? 10.0 g H = 0.25 g Na = 1.0 x 102 mg H2O =

+5
Answers (1)
  1. 25 October, 22:06
    0
    Moles = mass / molar mass

    moles of H = 10g/1g/mol (molar mass of H) = 10 moles of H

    moles of Na = 0.25g / 23 g/mol (molar mass of Na) = 0.0109 moles of Na

    moles of H20 = mass of water / molar mass of water (18 g/mol)

    mass of water in g = 1 g = 1000mg what about 1 x10^2 mg = ? g

    100mg x1g/1000mg=0.1 g

    moles is therefore = 0.1g / 18 g/mol = 5.556 x10^-3moles of H20
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “In each of the following, how many moles of each element or compound are present? 10.0 g H = 0.25 g Na = 1.0 x 102 mg H2O = ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers