There is no "average" onion. I regularly see them from 1.2 oz right up to 9-10 oz.
0.5kg per 500grams.
That is approximately 4 cups
500g is 0.5kg. so .748/.5 is 1.496 lots of 500g
50,000
Half
500grams=1pound
500grams
2000 grams!
20 10kg is 10,000 grams and 20x500 = 10,000.
Onions are classified into two categories. Green onions or scallions and dry onions, which are mature onions. There are many varieties of onions and range from red to white to yellow. Some are classified by the pungency, hot and mild. Because onions are being hybridized it would be hard to know how many kinds there are.
16.5
if you assume 1g/ml density, 500ml