Answer:
642000000000000000000000 kg
Step-by-step explanation:
The approximate mass of Mars is 6.42x10^23 kilograms. It is given in scientic notation.
We need to write the mass in standard notation. It is the normal way of writing any number. To write it in standard form, we move the decimal to the right side.
The standard form will be :
6.42x10^23 kg = 642000000000000000000000 kg
Hence, this is the required solution.