The following reaction is done at stp:

c (s) + 2h2 (g) = ch4 (g)

if the reaction produces 145 liters of ch4, how many liters of h2 were consumed?

290.0 L.

Explanation:

it is clear that 1.0 mole of C reacts with 2.0 moles of H₂ to produce 1.0 mole of CH₄.

PV = nRT,

where, P is the pressure of the CH₄ gas produced in atm (P = 1.0 atm at STP).

V is the volume of the CH₄ gas produced in L (V = 145.0 L).

n is the no. of moles of the CH₄ gas produced in mol.

R is the general gas constant (R = 0.082 L.atm/mol.K).

T is the temperature of the CH₄ gas produced in K (T = 273.15 K at STP).

∴ n = PV/RT = (1.0 atm)(145.0 L)/(0.082 L.atm/mol.K)(273.15 K) = 6.47 mol.

Using cross multiplication:

2.0 moles of H₂ produce → 1.0 mole of CH₄, from the stichiometry.

??? mole of H₂ produce → 6.47 mole of CH₄.

∴ The no. of moles of H₂ consumed to produce 145.0 L CH₄ = (2.0)(6.47)/(1.0) = 12.94 mol.

Now, we can get the liters of H₂ consumed to produce 145.0 L CH₄:

∴ V = nRT/P = (12.94 mol)(0.082 L.atm/mol.K)(273.15 K)/(1.0 atm) = 290.0 L.

Aerobic respiration is metabolic process in which food ( glucose) is metabolized ( in presence of oxygen) to derive large amount of energy ( in the form of ATP) through a series of three stages that is glycolysis, kreb cycle, and electron transport chain.

Anaerobic respiration another from of cellular respiration where food is broken down to derive energy in the absence of oxygen.

Alcoholic fermentation is a metabolic process by which sugar is converted into cellular energy ( in the form of ATP), ethanol, and carbon dioxide.

Lactic acid fermentation is a metabolic process by which glucose is converted into cellular energy and lactic acid.

Thus, the correct match is-

Aerobic respiration- A) The breakdown of food to create energy in the presence of oxygen.

Alcoholic fermentation- C) A process that converts sugars into cellular energy, ethanol, and carbon dioxide.

Anaerobic respiration- B) The production of energy without the presence of oxygen.

Lactic acid fermentation- D) A process that converts glucose into cellular energy and lactic acid.

Explanation: