Types of Chemical Reactions — Cumulative exam Answers
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How are isotopes defined?
A
forms of different elements that have the same number of neutrons in each atomB
forms of different elements that have the same number of protons in each atomC
forms of the same element that differ in the number of neutrons in each atomD
forms of the same element that differ in the number of protons in each atom22
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The diagrams show gases that are stored in two separate but similar containers.If both gases are at the same temperature, which one has the greater pressure?
A
gas 1 because the particles are moving much fasterB
gas 1 because it has fewer particles that are close togetherC
gas 2 because it has more particles that are collidingD
gas 2 because the particles have more space between them23
Which is a postulate of the kinetic-molecular theory?
A
Gas particles have a small volume relative to the spaces between them.B
Gas particles have a large volume relative to the spaces between them.C
Gas particles are very small in size and always move slowly.D
Gas particles are very large in size and always move slowly.24
The mass number of a chromium atom is 52 and it has 24 protons. How many neutrons does this atom have?
A
24B
28C
76D
8025
Consider the reaction below.2Al2O3 4Al + 3O2How many moles of oxygen are produced if 11.0 mol of Al are produced?
A
8.25 molB
11.0 molC
14.7 molD
16.5 molDid you find these answers helpful?
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