Wisconsin Forward Science Grade 8 Practice Questions - Wisconsin Forward Exam Science - Grade 8 Exam

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A student measures the mass of a sealed flask containing 10 g of baking soda and 20 g of vinegar. After mixing the substances inside the sealed flask, a gas forms and bubbles appear. What is the total mass of the flask and its contents after the reaction?

Exactly 30 g plus the mass of the flask Less than 30 g because gas was produced More than 30 g because bubbles add weight 0 g because a chemical change destroyed matter

Correct Answer:

Exactly 30 g plus the mass of the flask

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