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CHEMISTRY! NEED HELP FAST!

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if 250 ml of oxygen at stp are consumed when magnesium burns, how many grams of magnesium oxide? [Mg(s) + O2(g) ---> MgO(s)]

  • CHEMISTRY! NEED HELP FAST! -

    How many mols O2 were consumed? That's 0.250 L x (1 mol/22.4L) = ? mols O2.
    Use the coefficients in the balanced equation to convert mols O2 to mols MgO.
    Now convert mols MgO to g. g = mols x molar mass.

  • CHEMISTRY! NEED HELP FAST! -

    i can't find the answer can u show me how to do the work step by step and tell me the answer my homework is due tomorrow

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