24g of magnesium contains - 1 mole of magnesium atoms, 12g of magnesium contains - 1/2 of Avogadro's number, Avogadro's number is - 6.022 X 10 power 23 particles, molar mass is - the mass in grams of 1 mole, Mr is - the relative molecular mass, Mr of a water molecule is - 18, The Mr is the sum... - ...of the Ar's of the elements in a formula, The limiting reagent is - the element that will run out first in a reaction, The reagent in excess is - the reagent which is left over at the end of a reaction, 1 mole of any gas occupies a space of - 24 dm3, 1000 cm3 = - 1 dm3, 2 moles of carbon dioxide will occupy - 48 dm3, 12 dm3 = - 1/2 of a mole of oxygen gas, In the equation 2Mg + O2 --> 2MgO, - 2 moles of Mg react with 1 mole of O2,

Topic 3 Stoichiometry

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