3. Atoms change into other atoms in chemical reactions.
The idea that you can transform one element into another was called alchemy, and was proven untrue a long time ago.
The question above is simply asking us to convert the value from calories into kilojoules. Therefore, we need some factor to multiply to be able to convert it to such units. For calories to kJ, the factor would be 4.184.
2700 cal ( 4.184 kJ/cal) = 11296.8 kJ
Most transition metal form more than one cation but aluminum forms the Al3+ cation only.
The answer for the first one is the second option.
The answer for the second one is the last option.
Hope this helped and have a nice day : )
Planets, black wholes gravity
