Hydrogen fluoride is used in the manufacture of Freons, which destroy ozone in the stratosphere, and in the production of aluminum metal. It is prepared by the chemical reaction of calcium fluoride combining with hydrogen sulfate to produce calcium sulfate and hydrogen fluoride. A) Using your knowledge of chemical nomenclature and stoichiometry, write the balanced chemical equation for this reaction. (8 points) B) Assuming the reaction goes to completion, if 24.02 g of calcium fluoride is combine with 41.17 g of hydrogen sulfate, what is the mass of hydrogren fluoride that could be produced

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

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.

Acandle’s wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. the wick is usually surrounded by wax. which is the most important property of covalent compounds that makes them useful for making candle wax? a low boiling point a low melting point a high boiling point a high melting point