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Two substances have the same temperature. The particles of Substance A1 point
have a slower average speed than the particles in Substance B. What can
you say about the molar masses of the two substances?
O Their molar masses are the same.
The molar mass of Substance A is greater than Substance B
B the molar mass of substance is greater than substance b
C The molar mass of substance B is greater than substance a
D there is not enough information

C The molar mass of substance B is greater than substance A

Explanation:

From the description given, the molar mass of substance B is definitely greater than that of substance A.

 Temperature increases the kinetic energy of a body. The average molecular speed increases with increasing temperature.

 Since the two bodies given are at the same temperature, the one having a lesser molecular mass will have a higher speed.

Substances with low molecular mass can diffuse or effuse more rapidly than one with higher molecular mass under similar conditions.

the answer to your question is c

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.