A 300,000-gallon tank has been storing aqueous radioactive waste since approximately 1945. The primary radioactive species in this waste is cesium, which is present as both radioactive and non-radioactive isotopes. The total cesium concentration is 0.005 g Cs/L and half of the Cs is the radioactive isotope cesium-137 (137Cs). It also is known that the specific radioactivity of 137Cs is 86.58 Ci/g, where Ci represents the unit curie, which is defined as 3.7 ? 1010 radioactive decays per s. In the radioactive decay of 137Cs, cesium is converted to barium at a rate that satisfies the expression Where N and N0 are amounts of cesium and t0.5 is the half-life of the isotope, which for 137Cs is 30.1 years. (a) What fraction of the cesium would have to be removed from the solution in order for the radioactivity to be reduced to 0.001 Ci/L? (b) What would be the total amount of Cs removed from the tank in order to reach that level of radioactivity? (c) Assuming the radioactive cesium was placed in the tank in 1945, what was the original total concentration of cesium and the corresponding radioactivity in Ci/L?

What is the maximum number of movies he could purchase : what is the maximum number of movies he could purchase? e) if the price of movies increases to $12 and price of rental housing increases to $2.00 per sq foot, what happens to Jordan's budget constraint? Draw this new budget on your graph. |

What is the equilibrium constant for the following reaction : The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is 58.0 at a certain temperature. |

Explain how the change in expectations causes bond market : Explain how the change in expectations causes the bond market to move from initial equilibrium E1 to final equilibrium E2. Hint: Equilibrium shifts left, prices go down. |

What amount will the city need to set aside : It is estimated that operation and maintenance costs will be $1.5 million every year. What amount will the city need to set aside? Interest earned on the annuity is 7%. |

Explain what was the original total concentration of cesium : what was the original total concentration of cesium and the corresponding radioactivity in Ci/L? |

The role of a consultant to an airport planning commission. : Topography, especially mountains, affects the weather in many different ways. In this activity, you will play the role of a consultant to an airport planning commission. The new airport is to be located at one of three locations in a mountainous regi.. |

What is the cost of one acre-foot of water to the irrigator : In an irrigation district in the west, an irrigator can purchase an extra share (allotment) which entitles the holder to a 0.7 acre-foot of water per year in perpetuity. If the share costs $1600, what is the cost of one acre-foot of water to the .. |

What are the limits of the terms of trade : What are the the limits of the terms of trade between these two countries? How would rising cost (rather than constant costs) affect the extent of specialization and trade between these two countries? |

Responsibilities for reporting payroll taxes : Describe employer responsibilities for reporting payroll taxes.(To the extent possible reference the form to be filed for each tax.) |

## What is the empirical formula of the productIf 0.176 moles of Mg have combined with 0.220 moles of O, what is the empirical formula of the product? |

## What is the total combined mass of carbon dioxide and wateran automobile gasoline tank holds 21 kg of gasoline. When gasoline burs, 81 kg of oxygen is consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced? |

## Calculate what is the equilibrium concentration of h2Established in a container of 1.0 Litre at a temperature of 1,000 K, where K c = 4.0 ⋅ 10NH 3 (g) are present. Calculate What is the equilibrium concentration of H 2 (g).? |

## Estimate the steady state concentration of so2A Power plant is the main point source of SO2 emissions for a 25 km2 area. Estimate the steady-state concentration of SO2 for this area from this point source given the following temperature data. Windspeed= 5km/hr. |

## Determine which flask has the smallest amount of waterDetermine which flask has the smallest amount of water vapour and which one has greater vapor pressure of H 2 O? |

## Describe alkene productsDescribe Alkene Products, When tert-pentyl bromide is treated with 80% ethanol, the amounts of alkene products indicated below are detected on analysis. |

## Calculate the concentration of ammonium ions and sulfate ionA solution is prepared by dissolving 13.3 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 11.50 mL sample of this stock solution |

## How many moles of na2so3 were addedHow many moles of Na2SO3 were added to the calorimeter cup if 30.0mL 0.50 M NaOCl and 70.0mL 0.50 M Na2SO3 were combined? |

## Calculate the amount heat evolved per mole of glucoseA 0.692 g sample of glucose, C6H12O6, is burned in a constant volume, bomb calorimeter. The temperature change is measured at 1.80 degrees C. |

## Determine the pressure in the tankA fifty litres container of stainless steel was charged with 5.00 atm of H2(hydrogen gas) and 6.00 atm of O2(oxygen gas). A spark ignited this mixture (hydrogen gas & oxygen gas) |

## Explain methyl hydrogen atoms of propeneWhy are the products attached to C3 of 1,4 pentadiene more acidic than the methyl hydrogen atoms of propene? Maybe you can help me with this one. Are the C3 atoms more acidic because there is more s character involved with the atoms and as the s ch.. |

## Evaluate the time taken by a reactantChemical Kinetics - Determine the time taken by a reactant to reach a particular concentration |

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