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
1 hectare = 0.01 square kilometers
China is between 9,596,961 to 9,639,688 sq. km.
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.
440 square kilometers = 169.9 square miles.
3250 square meters = 0.00325 square kilometers
617.76 square miles = 1600 square kilometers
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
Manitoba is 548,000 square kilometers
6084264960000 square kilometers. Give or take.
Israel covers 22,072 square kilometers.
225 square kilometers equates to 2,421,879,750 square feet.