Asample of a substance contains 3.70
a. 0.615 1024 mol
b. 0.615 1023 mol
1023 formula units. how many moles are contained in the sample?
c 0.615 mol
d. 22.3 mol
select the best answer from the choices provided
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Identical marbles are released from the same height on each of the following four frictionless ramps . compare the speed of the marbles at the end of each ramp. explain your reasoning

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