A weather balloon calibrated at 0.00 °C to have a volume of 20.0 L has what volume at -26.6 °C assuming pressure is held constant?

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl