Elementary arithmetics

1003099205

Level: 
A
Mass of a hydrogen atom is \( 0.000\,000\,000\,000\,000\,000\,000\,001\,67\,\mathrm{g} \). Give the mass in exponential notation.
\( 1.67\cdot10^{-24}\,\mathrm{g} \)
\( 167\cdot10^{-26}\,\mathrm{g} \)
\( 1.67\cdot10^{24}\,\mathrm{g} \)
\( 167\cdot10^{-21}\,\mathrm{g} \)

2010006103

Level: 
A
The light travels at speed of \(300\, 000\) kilometers per second. How many kilometres it travels in \(24\) hours? Give the result in exponential notation.
\( 2.592\cdot10^{10}\,\mathrm{km} \)
\( 2.592\cdot10^{11}\,\mathrm{km} \)
\( 25.92\cdot10^{10}\,\mathrm{km} \)
\( 2.592\cdot10^{9}\,\mathrm{km} \)