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- Please both questions answered than rating helpful other wise un helpfulIf a sample of gas is heated from 100°C to 300°C at constant pressure, the volume will ? by a factor of_? _. 1. increase; about three 2. increase; about 1.5 3. No other answer is correct, because the volume cannot change when the pressure is constant. 4. decrease; about 1.5Please complete answers than rating helpful other wise un helpful 6 and 7