Chemistry, 12.01.2021 23:20 Gyalissunout3526
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
Chemistry, 22.06.2019 10:50
8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm
Answers: 1
Chemistry, 23.06.2019 10:20
El amoniaco y el fluor reaccionan para formar tetrafluoruro de dinitrogeno y fluoruro de hidrogeno. segun la reaccion: nh3 + f2 ⇒ n2f4 + hf si reaccionan 5 gramos de amoniaco y 20 gramos de fuor, ¿cuantos gramos de fluoruro de hidrogeno se producen?
Answers: 2
Chemistry, 23.06.2019 16:40
Which heterogeneous mixture contains large particles that can settle out or can be filtered? colloid compound element suspension
Answers: 1
Chemistry, 23.06.2019 21:00
Examine these two msds from different manufacturers for sodium hydroxide (naoh). compare and contrast the following aspects: chemical names, chemical properties, order of components, health hazards, and proper disposal. click on each of the links to examine two msds reports from different sources. sodium hydroxide version 1 sodium hydroxide version 2
Answers: 1
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