A tanker crash releases concentrated sulphuric acid on a road surface. What is the safest way to deal with the spill?

Anaerobic digestion produces biogas with a composition of 75% methane (CH₄) and 25% carbon dioxide (CO₂). The weekly rate of biogas production is equivalent to 11.1 L CH₄ / kg sludge at standard temperature and pressure. If an anaerobic digester is loaded with 25 tonnes of sludge, how many weeks would it take to fill a 5000 m³ gas holder to a pressure of 2.5 bar at 10 °C?

Continuing from Q2, what is the pH of a solution of 25 mg L^-1 NH₃?

In Q2, what are the units of ammonia’s K_eq?

What is DDD?

What is CCC?

Ammonia is a weak base. Its dissociation in water is an important part of nitrogen cycling in the environment. It has an equilibrium constant of K_eq = 1.76 x 10^-5. 

The dissociation reaction has the form

NH₃ + BBB   CCC + DDD

What is BBB? [Important: enter your answer as a combination of letters, numbers, and/or symbols. Don’t use spaces or attempt sub- or superscripts]

A solution contains 378 mg L^-1 HNO₃. What is its pH?