Chemistry, 28.01.2021 18:40 Kcloughley
A sample of a substance was heated strongly in a crucible, and the sample increased in mass.
This is evidence that
A. a gas had been evolved.
B. the substance had melted.
C. the substance had sublimed.
D. a chemical change had taken place.
O E. a change of state had occurred.
Answers: 2
Chemistry, 21.06.2019 15:20
Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.
Answers: 2
Chemistry, 23.06.2019 08:00
Can anyone answer these questions? ? i need it before 1: 00pm today
Answers: 1
A sample of a substance was heated strongly in a crucible, and the sample increased in mass.
This i...
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