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27 g of Al (Atomic mass = 27) will combine with __________ of O2 to form aluminium oxide.

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Important Questions on Some Basic Concepts of Chemistry

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The volume of ammonia at NTP obtained by the combination of 10 mL of N2 and 30 mL H2 is: 
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What mass of CaO will be obtained by heating 3 mole of CaCO3? Atomic mass of Ca = 40
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3g of H2 reacts with 29 g of O2 to yield water. The limiting reactant is______________ and the number of moles of H2O formed is ___________
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Two elements, X (Atomic mass 16) and Y (Atomic mass 14) combine to form compounds A, B and C. The ratio of different masses of Y that combine with fixed mass of X in A, B and C is 1 : 3 : 5. If 32 parts by mass of X combine with 84 parts by mass of Y in B, in C, 16 parts by mass of X will combine with _______________
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A sample of pure carbon dioxide irrespective of its source, contains 27.27% of carbon and 72.73% of oxygen. The data supports the ________