Answer:
You start with 9.4 x 1025 molecules of H2.
You know that an Avogadro's number of molecules of H2 has a mass of 2.0 g.
To solve, 9.4 x 1025 molecules H2 x (2.0 g H2 / 6.023 x 1023 molecules H2) = 312. g H2
Explanation:
Answer:
C. Balanced forces caused a change in the motion of the plates.
Explanation:
Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. This movement in the mantle causes the plates to move slowly across the surface of the Earth.
The correct question is: How many moles are in
atoms of boron.
Answer: There are 145 moles present in
atoms of boron.
Explanation:
According to the mole concept, there are
atoms present in one mole of every substance.
Hence, number of moles present in
atoms is calculated as follows.

Thus, we can conclude that there are 145 moles present in
atoms of boron.