Hcs340 Week 2

An aerosol spray can of deodorant with a volume of 460 contains 2.9 of propane gas as propellant.

Part A

What is the pressure in the can at 20 ?

Express your answer using two significant figures.

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Assume that you have 3.20 of the deadly gas hydrogen cyanide, . What is the volume of the gas at STP?

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----------------------------------------------------------------------------------------------------------------The heat of fusion of sodium metal is 630 . How much heat (in kilocalories) is required to melt 236 of sodium?   =  | |     |

----------------------------------------------------------------------------------------------------------------The heat of vaporization of water is 9.72 .Part A How much heat (in kilocalories) is required to vaporize 2.90 of ?   =  | 28.2 |     |

CorrectPart B How much heat (in kilocalories) is released when 335 of steam condenses?   =  | |     |

-------------------------------------------------------------------------------------------------------------Nitric acid, , is available commercially at a concentration of 16 .Part A What volume would you use to prepare 630 of a 0.12 solution? Express your answer using two significant figures.   =  | |     |

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How many milliliters of 0.0150 solution are needed to dissolve 0.450 of ?

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± Calculating Percent Concentration

The percent concentration of a solution is a ratio of the amounts of dissolved solute and solution, expressed as a percentage. The percent concentration of a solution can be written generally as

Depending on the situation, a percent concentration might be calculated for mass/mass, volume/volume, or...