Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products. part a: hcho2(aq)+h2o(l)⇌h3o+(aq)+cho−2(aq) use a for [hcho2], b for [h2o], c for [h3o+], d for [cho−2].
part b: co2−3(aq)+h2o(l)⇌hco−3(aq)+oh−(aq) use a for [co2−3], b for [h2o], c for [hco−3], d for [oh−].
part c: 2c(s)+o2(g)⇌2co(g) use a for [c], b for [o2], c for [co].
part d: c(s)+co2(g)⇌2co(g) use a for [c], b for [co2], c for [co].

Part A:

Part B:

Part C:

Part D:

Explanation:

Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products.

The equilibrium constant (Kc) is equal to the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients. It only includes gases and aqueous species (not liquids or solids).

Part A: HCHO₂(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CHO₂⁻(aq)

Use A for [HCHO₂], B for [H₂O], C for [H₃O⁺], D for [CHO₂⁻].

PART B: CO₃²⁻(aq) + H₂O(l) ⇌ HCO₃⁻(aq) + OH⁻(aq)

Use A for [CO₃²⁻], B for [H₂O], C for [HCO₃⁻], D for [OH⁻].

PART C: 2 C(s) + O₂(g) ⇌ 2 CO(g)

Use A for [C], B for [O₂], C for [CO].

PART D: C(s) + CO₂(g) ⇌ 2 CO(g)

Use A for [C], B for [CO₂], C for [CO].

give brainliest

water pollution kills aquatic life. aquatic life includes algae and other plant life that use photosynthesis. photosynthesis takes   c02 out of the air.  

c02is a greenhouse gas.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms