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Natural isotopes of krypton are: Kr-78, Kr-80, Kr-81, Kr-82, Kr-83, Kr-84, Kr-86.
Coins:
50 ore
1 krone (kr) = 100 ore
5 kr
10 kr
20 kr
Bills:
50 kr
100 kr
200 kr
500 kr
1000 kr
KR
The mass of 1 mole of an element is its atomic weight on the periodic table in grams.
1g = 1000mg
The mass of 1 mole of Kr = 83.80g Kr
Convert mg Kr to g Kr.
398mg Kr x (1g/1000mg) = 0.398g Kr
Convert g Kr to mol Kr.
0.398g Kr x (1mol Kr/83.80g Kr) = 4.75x10-3mol Kr