2K + 2H2O → 2KOH + H2
She records the total mass of potassium and water in the lab before combining them. The table shows her measurements.
Sharon predicts that the mass of the products will be 60 g. According to the law of conservation of matter, is Sharon’s prediction correct or incorrect? Why or why not?
(1 point)
Responses
Her prediction is correct because the law of conservation of matter states that matter can neither be created nor destroyed in a chemical reaction.
Her prediction is correct because the law of conservation of matter states that matter can neither be created nor destroyed in a chemical reaction.
Her prediction is incorrect because the law of conservation of matter states that some mass is lost in a chemical reaction, so the mass of the products will be less than 50 g.
Her prediction is incorrect because the law of conservation of matter states that some mass is lost in a chemical reaction, so the mass of the products will be less than 50 g.
Her prediction is incorrect because the law of conservation of matter states that matter can neither be created nor destroyed, so the mass of the products will be 50 g.
Her prediction is incorrect because the law of conservation of matter states that matter can neither be created nor destroyed, so the mass of the products will be 50 g.
Her prediction is correct because the law of conservation of matter states that the products of a reaction have more mass than the reactants.
Her prediction is correct because the law of conservation of matter states that the products of a reaction have more mass than the reactants.
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1 answer
Her prediction is incorrect because the law of conservation of matter states that matter can neither be created nor destroyed, so the mass of the products will be 50 g.
The mass of the reactants (potassium and water) should equal the mass of the products (potassium hydroxide and hydrogen) in a chemical reaction. If Sharon measures the total mass of the reactants and finds it to be 50 g, then according to the law of conservation of matter, the mass of the products must also be 50 g.
