What energy is needed to start a chemical reaction is

The chemical formula of a compound dies not indicate

In photosynthesis, what is the fate of the oxygen atoms present in co2? they end up

Hydrogen sulfide decomposes according to the following reaction, 2 H2S (g) → 2 H2 (g) + S2 (g) where ∆S = + 78.1 J/K, ∆H = + 169.4 kJ, which answer describes the entire range of temperatures where the reaction would be spontaneous?

What happens when body cells are placed in a hypertonic solution?

Which statements correctly describe atmospheric pressure? A) It's the same everywhere in the atmosphere. B) It pushes on all objects that are on Earth's surface. C) It can be measured in atmospheres or kilopascals.

Which of the following is an extensive physical property? viscosity color mass density

Are protons and neutrons the same size? Explain.

3) which is an example of a physical change? a) grinding pepper b) toasting bread c) lighting up a grill d) baking a cake

When a bond is formed, energy is _ the atoms

Describe 2 theories for yawning