Which of the following postulates of John Dalton's modern atomic theory, published in 1800, is now known to be incorrect?
a. All atoms of a particular element are identical.
b. All matter is composed of tiny particles called atoms.
c. Atoms cannot be created or destroyed during chemical reactions.
d. Chemical compounds are combinations of elements in fixed ratios.
e. Atoms of different elements are different in some fundamental way(s).
Answers: 3
Chemistry, 22.06.2019 14:30
Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.
Answers: 1
Chemistry, 22.06.2019 14:40
Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products
Answers: 2
Chemistry, 22.06.2019 19:00
Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²
Answers: 2
Which of the following postulates of John Dalton's modern atomic theory, published in 1800, is now k...
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