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bekas [8.4K]
3 years ago
8

Why do all chemical reactions require activation energy?

Biology
1 answer:
myrzilka [38]3 years ago
4 0
Because chemical reactions cannot react spontaneously                   
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2 years ago
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2. It is made of sandstone which is very porous and is easily penetrated by rainwater

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What takes place when you inhale?
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When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale

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