Obi is trying to determine if a powdery, solid substance is an element or a compound. After recording some observations, he strongly heats a sample of the solid over a burner flame. After fifteen minutes, he turns off the flame and allows the sample to cool. He records his final observations in the data table.
Which is the best explanation of his results?
The heating changed some of the sample to gas, causing the mass to decrease without breaking down the sample. Therefore, the original sample is a compound.
The appearance stayed the same, showing that the sample was not broken down by heating. Therefore, the original substance is an element.
The mass decreased during heating and some of the impurities escaped. Therefore, the original substance is an element.
The chemical reaction with acid changed, showing that the sample was broken down by heating. Therefore, the original substance is a compound
Answers: 3
Chemistry, 22.06.2019 00:00
Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.
Answers: 3
Chemistry, 22.06.2019 02:30
You have a sample of a gas that occupies a volume of 17ml at -111 degrees celsius. what volume does the sample occupy at 88 degrees celsius? show all work asap
Answers: 3
Chemistry, 23.06.2019 00:30
What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced
Answers: 1
Chemistry, 23.06.2019 02:30
Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 Γ 10β4 .
Answers: 2
Obi is trying to determine if a powdery, solid substance is an element or a compound. After recordin...
Mathematics, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
Computers and Technology, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
Computers and Technology, 11.06.2020 19:57
Biology, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
Social Studies, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
French, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
Chemistry, 11.06.2020 19:57
Spanish, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
Mathematics, 11.06.2020 19:57
History, 11.06.2020 19:57