The movement of gases through pinhole is called effusion and the effusion rate indirectly proportional to the molar mass of gas
The lighter mass gas effuses faster than the heavier one
so He(g) will escapes faster and it will move with higher average speed because it has less mass than Ne(g)
the equation is CH4 + O2 --> H20 + CO2.
im pretty sure it absorbs the heat.
2. vinegar and baking soda mixing and creating bubbles, if it changes form like bubbles or produces heat then it’s chemical changes.
A because it is i did. that thing
