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The number 02 has one significant figure because a leading zero is not significant. So the significant figure is the digit 2.
15 moles of 02 equal 480 g.
02 is larger than 0013 because leading zeros do not change the value of a number.
8 electrons and 8 protons.
The answer is 1,72 moles.
2 volts is equal to 2000 millivolts.