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Calculate the maximum mass of calcium metal that should be used in an equivalent mass determination, with a 100 ml gas measuring tube for collection. Assume 80 ml of hydrogen gas at standard conditions for the purposes of calculation.

  • Chemistry -

    80 mL x (1 mol/22,400 mL) = 0.00357 mols H2 gas.
    Ca + 2H2O ==> H2 + Ca(OH)2
    mols H2 gas = mols Ca.
    g Ca = mols Ca x atomic mass Ca.

  • comment---Chemistry -

    I made no correction for collection over water since that was not mentioned.

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