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MBD-ATOMS AND MOLECULES -Example
- What is the ratio by mass of C and O in carbon dioxide ?
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- What is the ratio by number between the atoms of H and O in water ?
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- Define an ion.
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- What is a cation ?
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- What is an anion ?
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- What is the ratio by mass of Ca nd O in calcium oxide (CaO) ?
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- What is the ratio by mass of Mg and S in magnesium sulphate ?
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- What is the ratio by mass of Na and Cl in sodium chloride (NaCl) ?
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- Define chemical formula ?
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- Define valency
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- What are diatomic molecules ?
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- Define molecular mass of a subtance?
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- Which unit is used for expressing molecular masses ?
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- What is the new name given to a.m.u. by IUPAC ?
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- Name the elements present in wate(H2O).
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- What is one mole of an element ?
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- What is Avogardro's number ?
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- How is Avogadro's number denoted ?
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- In what ratio elements combine to form a compound ?
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- Which scientist gave law of conservation of mass ?
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