A reaction occurs when solid X is placed into solution Y. As a result, the temperature of the new solution increases by 3°C. The
temperature rises another 2°C when more of solid X is added to the solution. What does this indicate about the effect of adding
more solid?
1.It increased the number of molecular collisions.
2. It decreased the number of molecular collisions.
3. It decreased the space between the molecules and lowered the reaction rate.
4. It increased the space between the molecules and increased the reaction rate.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.