If a sample of NH3 gas at 689,1 mmHg has a volume of 607 2 mL and the presure is
changed to 560,8 mmHg, then what will be the new volume of the NH3 gas, in militers. Be
sure to round to the correct sig digs,

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.