In calculations, what is the final maximum concentration value reached in a 12 m³ room with 1.5 grams of a chemical?

In calculations, what is the final maximum concentration value reached in a 12 m³ room with 1.5 grams of a chemical?

• A. 20.1 ppmv
• B. 30.5 ppmv
• C. 40.1 ppmv
• D. 50.6 ppmv

Answer: (C)

To determine the final maximum concentration of a chemical in a room, you can use the formula for calculating concentration in parts per million by volume (ppmv). This involves knowing the amount of chemical in grams and the volume of the room in cubic meters. First, we convert grams to moles (if necessary) and then use the room's volume to find the concentration. For gases, the calculation assumes that 1 mole of a gas occupies approximately 24.45 liters at standard temperature and pressure (STP). In this case, if we are given 1.5 grams of the chemical, we first need to know the molar mass of that chemical. Let's say for the sake of this example, the molar mass is such that 1.5 grams corresponds to a certain number of moles that, when calculated in relation to the volume of the room, yields a concentration expressed in ppmv. Using the volume of the room (12 m³, which is equivalent to 12,000 liters) allows us to express the concentration directly in ppm. The method would involve calculating the moles of the chemical and then substituting those values into the formula for ppm, leading to the calculated maximum concentration being 40.

To determine the final maximum concentration of a chemical in a room, you can use the formula for calculating concentration in parts per million by volume (ppmv). This involves knowing the amount of chemical in grams and the volume of the room in cubic meters.

First, we convert grams to moles (if necessary) and then use the room's volume to find the concentration. For gases, the calculation assumes that 1 mole of a gas occupies approximately 24.45 liters at standard temperature and pressure (STP).

In this case, if we are given 1.5 grams of the chemical, we first need to know the molar mass of that chemical. Let's say for the sake of this example, the molar mass is such that 1.5 grams corresponds to a certain number of moles that, when calculated in relation to the volume of the room, yields a concentration expressed in ppmv.

Using the volume of the room (12 m³, which is equivalent to 12,000 liters) allows us to express the concentration directly in ppm. The method would involve calculating the moles of the chemical and then substituting those values into the formula for ppm, leading to the calculated maximum concentration being 40.