Hydrogen gas was collected by downward displacement of water. A volume of 0.600 L of gas was collected at 25.0 °C and 740.0 torr. What volume will the dry hydrogen occupy at STP? The vapor pressure of water is 21.2 torr at 25.0 °C.

## How many liters of gasoline would you needIn Europe, gasoline efficiency is measured in km/L . If your car's gas mileage is 30.0 miles/gal, how many liters of gasoline would you need to buy to complete a 284- km trip in Europe? |

## What is the pressure inside the cylindera gas cylinder witha volume of 3.00 dm^3 contains 8.00 moles of oxygen gas at a temperature of 50.0k. what is the pressure inside the cylinder. |

## Find out the grams of fat and proteinDetermine the grams of fat, protein, and carbohydrate in one serving. Determine the number of "food calories" (Cal) per gram of fat, protein, and carbohydrate |

## Explain what is the final temperature of methaneThe normal boiling point of methane is -161.5 C. The specific heats of liquid and gaseous methane are 3.48 and 2.22 J/g.K, respectively. What is the final temperature of methane once the system equilibriates? |

## Compute the edge length of the unit cellFrom this information and the atomic mass, calculate the edge length of the unit cell. Now assume that rubidium atoms are spheres. Each corner sphere of the unit cell touches the body centered sphere. Calculate the radius of a rubidium atom. |

## State photon of red light and reemit photon of violet lightIs it possible for an atom to absorb a photon of red light and reemit a photon of violet light |

## How many grams of nh3 are consumedHow many Grams of NH3 are consumed when 12.5 grams of 02 react completely in the following equation? I am not sure exactly how to solve this. |

## What is the total pressure in the flaskA1.15 g sample of dry ice is added to a 765 mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 715 mm Hg. |

## Compute the ph at the equivalence point for titratingCalculate the pH at the equivalence point for titrating 0.170 M solutions of each of the following bases with 0.170 M HBr. |

## State the main sources of error in a calorimetry experiementwhat are the main sources of error in a calorimetry experiement. describe at least three errors. |

## Calcultate what is the value of enthalpyCalcultate what is the value of enthalpy H reaction If the temperature increased from 35.0 degree celsius to 76 degree celsius and the heat capacity of the calorimeter = 23.3kj/c ? (the molar mass of C2H5OH = 46.07g/mol. ) |

## What is the mass of a cube of leadThe mass of a cube of iron is 379 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions? |

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