All St. Gaudens double eagles had a nominal weight of 33.4 grams when new.
The coins were made of 90% gold and 10% copper so they contained a bit less than 30.1 grams of pure gold.
A 1924 Saint-Gaudens $20 gold coin weighs 33.436 grams and of that weight, gold comprises 30.092 grams.
All US Double Eagles weigh 33.436 grams
The present 50 cent piece has a weight of 11.340 grams (0.365 troy ounce)
The weight is 16.718 grams. Net weight of pure gold is .48375oz.
Total weight is 16.718 grams and it contains .48375oz of pure gold.
In grams
1.672 grams
It has a total weigh of 24.6 grams.
approximately 23 grams
piece of gum
6.6 grams
Grams are not a measure for weight so the question is like asking how many kilometres would a dollar worth of pennies weigh!