The mass of one dust particle is

PHYSICS · Subjective · CBSE · Physics · Units and Measurements · Units and Measurements

Problem

4.23\times10^{-12}\,\text{kg}

. An experiment collects

2.00\times10^{8}

such particles and then removes

7.50\times10^{-4}\,\text{kg}

of contaminant. Determine the final mass of the collected dust in scientific notation, expressed in micrograms (

\mu\text{g}

) to three significant figures.