For the following balanced equation, which has the highest coefficient? 4 H₂ + 2 C → 2 CH₄

Element M is prepared industrially by a two-step procedure according to the following (unbalanced) equations:

Assume that 0.855 g of M₂O₃ is submitted to the reaction sequence. When the HCl produced in step (2) is dissolved in water and titrated with 0.511 M NaOH, 144.2 mL of the NaOH solution is required to neutralize the HCl. (a) Balance both equations.

Acid spills are often neutralized with sodium carbonate or sodium hydrogen carbonate. For neutralization of acetic acid, the unbalanced equations are

(1) CH₃CO₂H(l) + Na₂CO₃(s) → CH₃CO₂Na(aq) + CO₂(g) + H₂O(l)

(2) CH₃CO₂H(l) + NaHCO₃(s) → CH₃CO₂Na(aq) + CO₂(g) + H₂O(l)

(a) Balance both equations.

For each molecule of C4H8 that reacts, how many molecules of carbon dioxide and water are produced?

H₃PO₄ + Mg(OH)₂ → Mg₃(PO₄)₂ + H₂O

Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate.

Enter a balanced chemical equation for the reaction of solid potassium with liquid water.

When aluminum, Al, metal is dipped in an aqueous solution of hydrochloric acid, HCl, hydrogen gas, H₂, is produced with the formation of an aluminum chloride, AlCl₃, solution. Write the balanced chemical equation showing the phases of reactants and products.

Write a balanced chemical equation based on the following description: 

nitrogen gas and oxygen gas react to produce nitrogen monoxide gas