What is the half-life (in years) of 44Ti if a 1.0 ng sample decays initially at a rate of 4.8*10^3 disintegration s/s?

Compute q when 28.6 g of water is heated : Calculate q when 28.6 g of water is heated from 22.0?C to 78.3?C. (the specific heat capacity for water = 4.184 J/(g•oC). |

Calculate the linear acceleration of the bicycle : A bicycle has wheels with a diameter (DIAMETER, not radius) of 0.580 m. Find the linear acceleration of the bicycle |

Compute how far will it go : A car is traveling at 50 miles per hours. The driver sees a deer and hits the brakes. How far will it go |

Determine how much energy is lost in the process : a solid wood door 90 cm wide by 2.00 m tall has a mass of 35.0 kg. it is ajar and at rest. a ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s, how much energy is lost in the process |

Explain the half-life of 44ti : What is the half-life (in years) of 44Ti if a 1.0 ng sample decays initially at a rate of 4.8*10^3 disintegration s/s |

Determine the galaxys speed relative to the earth : When viewed by an observer on the Earth, light from a distant galaxy is Doppler shifted to the red such that the ratio of the unshifted frequency to the observed frequency is 2.1 |

Demand for automobiles - foreign vs domestic : Provide statistical results by using STATA and interpretations - Topic is Demand for Automobiles: Foreign vs Domestic. |

Explain a solution of potassium permaganate is standardized : A solution of potassium permaganate is standardized with iron metal, a primary standard. The iron is dissolved in acid, reduced to Fe(II), and titrated with permanganate. |

What is the maximum possible overhang distance : A child is trying to stack two uniform wooden blocks, 12 cm in length so they will protrude as much as possible over the edge of a table without tipping over, What is the maximum possible overhang distance |

## Define how many photons are required to heat coffeeSuppose that the microwave radiation has a wavelength of 10.8cm . How many photons are required to heat 295mL of coffee from 25.0 ^\circ \rm C to 62.0 ^\circ \rm C |

## Compute the absolute temperature of the gasCalculate the volume of the gas, in liters, if 1.65 mol has a pressure of 0.995 atm at a temperature of -4 degrees Celsius. Calculate the absolute temperature of the gas at which 3.13 x 10-3 mol occupies 335 mL at 760 torr. |

## When 12563 g of an organic iron compound containing fe c hwhen 1.2563 g of an organic iron compound containing fe c h and o was burned in o2 2.2398 g of co2 and 0.67249 g of h2o |

## Explain constant temperature reactorUsing the thermochemical data given for NO2 and N2O4 in class, determine the fraction of N2O4 that will dissociate into two NO2 molecules if one mole of pure N2O4 is introduced to a 10 liter constant volume, |

## Explain silver chloride usually does not ppt in solutionSilver chloride usually does not ppt in solution of 1.0M NH3. However AgBr has a smaller Ksp. Will AgBr ppt form a solution containing 0.01M AgNO3, 0.01M NaBr and 1.0 M NH3? Ksp = 5 x 10^-13 |

## Write the bronsted-lowry chemical equationWrite the Bronsted-Lowry chemical equation describing how C2H5NH2 behaves when add to water. Indicate whether C2H5NH2 behaves as an acid or a base |

## Define the volume remains constant what will the temperatureA 3.0 L container holds a sample of hydrogen gas at 300 K and 100 kPa. If the pressure increases to 400 kPa and the volume remains constant, what will the temperature be |

## Explain what is the wavelength of the radiation producedA microwave oven operates at 2.70 . What is the wavelength of the radiation produced by this appliance |

## State what is the global ph change incurred after injectionwhat is the global pH change incurred after injection of the HCl? What would the pH change be if the same amount of 1.000 M HCl were put into a gallon of pure water? |

## What is the molar mass of the unknown gasA 2.50 g sample of an unknown gas occupies 885 mL at 697 mm Hg and 40 C. What is the molar mass of the unknown gas |

## Compute the grams of indicated product producedFor each of the following reactions, calculate the grams of indicated product produced when 20.0 g of each reactant is used: a) 4Al(s)+3O2(g)-->2Al2O3(s) (Al2O3). b) 3NO2(g)+H2O(l)-->2HNO3(aq)+NO(g) (HNO3). c)C2H5OH(l)+3O2(g)-->2CO2(g)+3H2O(g) (H.. |

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