Answer
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Work Step by Step
a. Baking soda is a pure substance because it is composed of sodium and bicarbonate in the compound.
b. Blueberry muffin is a mixture, for it is baked from different ingredients.
c. Ice is a pure substance since it is composed of hydrogen and oxygen in a compound.
d. Zinc is a pure substance. It is an element that cannot be broken down to pieces.
e. The trimix is a mixture. It is a homogeneous mixture of gases.
