Hydrogen sulfide gas (h2s) is a highly toxic gas that is responsible for the smell of rotten eggs. the volume of a container of hydrogen sulfide is 44.2ml. after the addition of more hydrogen sulfide, the volume increases to 98.5ml under constant pressure and temperature. the container now holds 1.97×10−3mol of the gas. how many grams of hydrogen sulfide were in the container initially? give your answer in three significant figures.

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

Draw metallic bonding if two copper

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.