The concentration of pollutant in `ppm (w//w)`. That has been measured at `450mg` per `150kg` of sample is

Options

A. `3 ppm`
B. `6ppm`
C. `3000ppm`
D. `330ppm`

Explanation

To find the concentration of the pollutant in parts per million (ppm) based on the given data, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of ppm**:
Parts per million (ppm) is a way of expressing very dilute concentrations of substances. It is defined as the mass of the solute (pollutant) divided by the mass of the solution (sample) multiplied by 10^6.

2. **Convert the Mass of the Sample**:
The mass of the sample is given as 150 kg. We need to convert this into grams since ppm is typically expressed in grams.
\[ 150 \text{ kg} = 150 \times 1000 \text{ g} = 150000 \text{ g} \]

3. **Identify the Mass of the Pollutant**:
The mass of the pollutant is given as 450 mg. We also need to convert this into grams.
\[ 450 \text{ mg} = \frac{450}{1000} \text{ g} = 0.45 \text{ g} \]

4. **Calculate the Concentration in ppm**:
Now, we can use the formula for ppm:
\[ \text{ppm} = \left( \frac{\text{mass of pollutant (g)}}{\text{mass of sample (g)}} \right) \times 10^6 \]
Substituting the values we have:
\[ \text{ppm} = \left( \frac{0.45 \text{ g}}{150000 \text{ g}} \right) \times 10^6 \]

5. **Perform the Calculation**:
\[ \text{ppm} = \left( \frac{0.45}{150000} \right) \times 10^6 = \left( 3 \times 10^{-6} \right) \times 10^6 = 3 \]

6. **Final Answer**:
The concentration of the pollutant in the sample is **3 ppm**.