a. Sodium reacts with excess oxygen to form sodium peroxide, Na 2 O 2 . 2Na +

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a. Sodium reacts with excess oxygen to form sodium peroxide, Na₂O₂.

2Na + O₂ → Na₂O₂

Calculate the maximum mass of sodium peroxide formed when 4.60 g of sodium is burnt in excess oxygen. (Ar values: Na = 23.0, O = 16.0)

b. Tin(IV) oxide is reduced to tin by carbon. Carbon monoxide is also formed.

SnO₂ + 2C → Sn + 2CO

Calculate the mass of carbon that exactly reacts with 14.0 g of tin(IV) oxide. Give your answer to 3 significant figures.
(A_r values: C = 12.0, O = 16.0, Sn = 118.7)

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Cambridge International AS And A Level Chemistry Coursebook

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Authors: Lawrie Ryan, Roger Norris

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a. Sodium reacts with excess oxygen to form sodium peroxide, Na 2 O 2 . 2Na +

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Cambridge International AS And A Level Chemistry Coursebook

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