None.
A square kilometre is a measure of area. It has no thickness and so no volume. It cannot, therefore contain any atoms.
The number of atoms in a cubic kilometre will depend on whether you are talking about interstellar space, the earth's atmosphere, ordinary matter, a stellar core or a black hole. The answer will range from nearly zero to infinity.
1.75 sq. km
254,805 km2
Answer: 9,600,000 square km = 5,965,163.445 square miles
China is between 9,596,961 to 9,639,688 sq. km.
1 hectare = 0.01 square kilometers
170,304 square kilometers
There are approximately 2190.85 square kilometers in 845 square miles.
Albania is around 28,748 square kilometers in size.
Macau is 31.3 square kilometers.
3250 square meters = 0.00325 square kilometers
440 square kilometers = 169.9 square miles.
1600 square kilometers is approximately 617.8 square miles.
There are 6,592,848.8 square miles in 17,075,400 square kilometers. 17,075,400 square kilometers x 1 square mile/2.58998811 square kilometers = 6,592,848.8 square miles 1 square miles = 2.58998811 square kilometers
6084264960000 square kilometers. Give or take.
Manitoba is 548,000 square kilometers
Israel covers 22,072 square kilometers.
You can convert kilometers to meters, or square kilometers to square meters. But you can't convert kilometers (a linear unit) to square meters (a square unit).