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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 is the first option

explanation:

just googled it m8. not that hard

lol

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.