Al2(SO3)3.
Many vintage pieces of hammered aluminum are numbered. I think it is similar to a serial number in that all items with the same shape and design would have the same number.
550 has 12 factors.
550 in u.s 550 in u.s
There are two significant figures in .550
550 gallons = 550 x 4 quarts = 2200 quarts
550 millimeters=0.55 meters
550 centimeters is 5.5 meters.
550 millimeters is 55 centimeters.
550 kilometres = 341.754156 miles
550 grams is 550,000 milligrams.
550 meters is 0.55 kilometers.
550 cm = 5.5 meters