1. Calculate the relative formula mass(Mr) of calcium hydroxide (Ca(OH)₂)

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2. Complete the following expression: mass =

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3. Balance the following equation: WO₃ + H₂ → W + H₂O

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4. Balance the equation for the reaction: ___ HCl(aq) + ___ MnO₂(s) → ___MnCl₂(aq) + ___H₂O(l) + ___ Cl₂(g)

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5. Complete the following expression: Mᵣ =

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6. What is the meaning of the word mole in Chemistry?

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7. What mass of calcium bromide will fully react with 71g of chlorine?

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8. Calculate the relative formula mass(Mr) of cobalt chloride crystals (CoCl₂.6H₂O)

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9. What mass of carbon dioxide is produced when 24g of carbon undergoes completely combustion?

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10. What are the units for amount in Chemistry?

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