Abuffer is made by weighing accurately 6.45 grams of anhydrous sodium acetate and dissolved in a volumetric flask to reach a volume of 100 ml while 1.14 ml of glacial acetic acid is placed into another 100 ml volumetric flask and diluted. 50 ml of sodium acetate solution and 50 ml of acetic acid are pipetted into a volumetric flask to make one buffer. write the chemical equation of the experiment.

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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.