A chemist prepares a sample of hydrogen bromide and finds that it occupies 252 mL at 70C and 464 Torr. What volume would it occupy at 0C at the same pressure?

Illustrate what is the magnitude of voltage that is measured : the diameter of the vessel is 5.6 mm. In a 0.60-T magnetic field illustrate what is the magnitude of the voltage that is measured with the electrodes in the drawing? |

Calculate the ph a solution : calculate the pH a solution that contains 0.800% C5H5N by mass and 0.815% C5H5NHCl by mass |

Find out the magnitude of acceleration under new conditions : It then increases it's speed at the rate of 1.55 m/s2. Find out the magnitude of acceleration under these new conditions. Answer in units m/s2. |

Find out the magnitude of the gravitational force exerted : find out the magnitude of the gravitational force exerted by one on the other. |

What volume would it occupy : A chemist prepares a sample of hydrogen bromide and finds that it occupies 252 mL at 70C and 464 Torr. What volume would it occupy at 0C at the same pressure. |

Explain maximum speed you could have : Explain how much distance is between you and the deer when you come to a stop? What is the maximum speed you could have and still not hit the deer? |

Restrictions on reducing to lowest terms : The given expression is called a rational expression because both numerator and denominator are polynomials. A rational expression is not defined for those values of the variable that make the denominator 0. |

What time is needed for the concentration : The half-life for the second order reaction of a substance A is 55 seconds when [A]o is 0.84 M. What time is needed for the concentration to decrease to 1/4 of the original value. |

Illustrate what are all the forces acting on the rod : The rod is initially at rest and oriented horizontally and then released so that it swings to the bottom. Illustrate what are all the forces acting on the rod? |

## Standard enthalpies of formationStandard Enthalpies of Formation: acetic and AB2 = - 25.65 kCal/ mole,A++ = -8.65 k Cal/ mole,Temperature = 10 Degree Celsius determine pK, |

## Calculate the specific heat of substanceInitially A sample of a substance of 23.43 g weight has temperature 24.2 °C then it absorbs heat and reached to temperature 122.0 degree Celsius; calculate the specific heat of this substance if it absorbs 2167 joule heat |

## What is the empirical formula of the compoundWhat is the empirical formula of the compound if Quantitative analysis of a 5.00-g sample of a gaseous compound yielded the following results: 2.00 g sulfur and 3.00 g oxygen? |

## Show the nuclear reactionsNuclear reactions is expressed in given reaction as 2/1H +2 /1H→3/2He + ? ; 233/92U+1/0n→133/51Sb+98/41Nb+?1/0n |

## Determine the keq for the reactionsCalculating the equilibrium constant (Keq) for the given reactions - Determine the Keq for the following reactions |

## Determine the half- life, in hours of iodineDetermine the half- life, in hours of iodine-123 If the amount of radioactive Iodine-123 in a sample decreases from 0.4 grams to 0.1 grams in 26.4 hours? |

## Calculate the ka for the acidEnough of a monoprotic acid is dissolved in water to produce a 0.0189 M solution. The pH of the resulting solution is 6.25. Calculate the Ka for the acid. |

## Determine the empirical and molecular formulasDetermine the empirical and molecular formulas of Ibuprofen has 75.69% C, 8.80%H and 15.51%O by mass and has a molar mass about 206g/mol. |

## Calculate the number of molecules of a gasTo calculate the number of molecules of a gas using ideal gas law and Avogadro's number - How many ozone molecules are present in 1.0 L of air under these conditions? |

## Calculate approximate values of radius of chlorine moleculeUse the van der Waals parameters for chlorine to calculate approximate values of (a) the Boyle temperature of chlorine and (b) the radius of a Cl2 molecule regarded as a sphere. |

## Why breathing faster helps to eliminate excess lactic acidWhen too much H2CO3 is in the blood, the enzyme carbonic anhydrase catalyzes the conversion of carbonic acid, H2CO3, to carbon dioxide, CO2, and water, H2O. |

## How much mass of the mix can be consumedA particular snack mix contains 1.30 g of salt per 100 g of the mix. How much mass of the mix can be consumed and still be within the FDA limit of 2.40 g of salt. |

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