40g! sorry if i’m wrong!!
Another gas that was used to fill balloons was hydrogen. The reason why hydrogen is not used today is because it use to cause many fires when it was used to fill balloons up.
Hope I helped you! :)
To Earth, since it has the same radio and masses. This is what I believe.
I think it will be D or B but my mine answer is D
Quick answer: Exothermic reactions mean that heat has escaped the system. The answer is A. Heat is released.
