For which of the following would ∆S most likely have a value very close to zero?
1. 2 H2O(ℓ) → 2 H2(g) + O2(g)
2. CO2(g) → CO2(s)
3. KOH(s) + NH4Cl(s) → NH3(g) + H2O(ℓ) + KCl(aq)
4. CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(ℓ)
5. CO(g) + NO2(g) → CO2(g) + NO(g)

Why are the trends and exceptions to the trends in ionization energy observed?

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride