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Rachel and Billy are conducting an experiment. The mass of their candle before burning was 7.0 grams. After burning the candle for six minutes, the mass went down to 5.5 grams. What can the students determine about the results of their experiment?
A
The law of conservation of mass cannot be applied over short periods of time.
B
The law of conservation of mass does not apply to chemical changes like burning.
C
The law of conservation of mass was broken because the mass of the candle decreased.
D
The law of conservation of mass was not broken because the missing mass was released as smoke.
Answers: 3
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In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2
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Connect the whole numbers on the periodic table to indicate what they represent?
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Which of the following is true about the products formed during photosynthesis? (5 points) select one: a. they have the same mass as the mass of reactants. b. they are the same set of compounds as the reactants. c. they have more mass than the mass of reactants. d. they are chemically the same as the reactants.
Answers: 1
Chemistry, 23.06.2019 09:30
My plate recommends that of your nutritional intake comes from fruits and vegetables. a. 30% b. 50% c. 20% d. 40%
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Rachel and Billy are conducting an experiment. The mass of their candle before burning was 7.0 g...
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