Ask Question
2 December, 19:44

Yet a third pair of compounds of manganese and oxygen is 50.48% and 36.81% oxygen respectively. In what small whole number ratio do masses of oxygen combine with a fixed mass of manganese in these two compounds

+4
Answers (1)
  1. 2 December, 22:39
    0
    The number ratio is 4:7

    Explanation:

    Step 1: Data given

    Compound 1 has 50.48 % oxygen

    Compound 2 has 36.81 % oxygen

    Molar mass oxygen = 16 g/mol

    Molar mass manganese = 54.94 g/mol

    Step 2: Calculate % manganes

    Compound 1: 100 - 50.48 = 49.52 %

    Compound 2: 100 - 36.81 = 63.19 %

    Step 3: Calculate mass

    Suppose mass of compounds = 100 grams

    Compound 1:

    50.48 % O = 50.48 grams

    49.52 % Mn = 49.52 grams

    Compound 2:

    36.81 % O = 36.81 grams

    63.19 % Mn = 63.19 grams

    Step 4: Calculate moles

    Compound 1

    Moles O = 50.48 grams / 16.0 g/mol = 3.155 moles

    Moles Mn = 49.52 grams / 54.94 g/mol = 0.9013 moles

    Compound 2

    Moles O = 36.81 grams / 16.0 g/mol = 2.301 moles

    Moles Mn = 63.19 grams / 54.94 g/mol = 1.150 moles

    Step 5: calculate mol ratio

    We will divide by the smallest amount of moles

    Compound 1

    O: 3.155/0.9013 = 3.5

    Mn: 0.9013 / 0.9013 = 1

    Mn2O7

    Compound 2

    O: 2.301 / 1.150 = 2

    Mn: 1.150 / 1.150 = 1

    MnO2

    The number ratio is 2:3.5 or 4:7
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Yet a third pair of compounds of manganese and oxygen is 50.48% and 36.81% oxygen respectively. In what small whole number ratio do masses ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers