Chemistry, 26.01.2021 08:10 wednesdayA
At the end of which era did the dinosaurs became extinct?
Cenozoic
Jurassic
Mesozoic
Paleozoic
Answers: 3
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Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.
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Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?
Answers: 2
At the end of which era did the dinosaurs became extinct?
Cenozoic
Jurassic
...
Jurassic
...
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