It's about 8,000,000 times as heavy as a Deck of Cards
In other words, 749.50 tonnes is 8,000,000 times the weight of a Deck of Cards, and the weight of a Deck of Cards is 0.00000013 times that amount.(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52-card deck)
A deck of 52 ISO 216 B8-size playing cards weighs 0.0000940 tonnes. Utilizing nearly 3,700 decks, the record-holding largest card tower was built in early 2010, stood over 3.5 m (11 ft), and weighed over 0.230 tonnes.
It's about 10,000,000 times as heavy as a Battery (C)
In other words, 749.50 tonnes is 12,000,000 times the weight of a Battery (C), and the weight of a Battery (C) is 0.000000083 times that amount.(Alkaline)
A "C" size battery weighs 0.0000650 tonnes. C batteries are typically used in medium-drain devices such as musical instruments.
It's about 15,000,000 times as heavy as a Tennis Ball
In other words, 749.50 tonnes is 13,000,000 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.0000000769 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.00005770 tonnes. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about 15,000,000 times as heavy as a Golf Ball
In other words, 749.50 tonnes is 16,320,000 times the weight of a Golf Ball, and the weight of a Golf Ball is 0.00000006127 times that amount.(per R&A USGA Rules of Golf; maximum rule weight)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), golf balls must weigh no more than 0.000045930 tonnes. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.
It's about 20,000,000 times as heavy as a Light Bulb
In other words, 749.50 tonnes is 22,000,000 times the weight of a Light Bulb, and the weight of a Light Bulb is 0.000000045 times that amount.(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 0.0000340 tonnes. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.
It's about 30,000,000 times as heavy as a Battery (AA)
In other words, 749.50 tonnes is 31,000,000 times the weight of a Battery (AA), and the weight of a Battery (AA) is 0.000000032 times that amount.(Alkaline)
An "AA" size battery weighs 0.0000240 tonnes. AA batteries came into common use during World War II and were given their name by the American National Standards Institute (ANSI) Committee C18 because they were smaller than the "A" size batteries which were invented first.
It's about 35,000,000 times as heavy as a Mouse
In other words, 749.50 tonnes is 36,000,000 times the weight of a Mouse, and the weight of a Mouse is 0.000000028 times that amount.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 0.0000210 tonnes. While most mice typically live two to three years, the Methuselah Mouse Prize — an award administered by a non-profit organization which advances aging-related research — was once awarded to a team of scientists whose research resulted in a mouse living just under five years.