It is given that the half-life of 137Ce =30. Years. Determine how many grams will remain in 150 Years If we have 150.000 g of 137Ce now,?

Determine the pH of a solution made by mixing 10.5 grams of CH_{3}COONa (sodium acetate,) to 400 mL of 0.180 M HCl (hydrochloric acid. )assume no change in volume takes place

## Calculated what is the pressure exerted by the tweezersCalculated what is the pressure exerted by the tweezers on the floor at the moment of impact |

## First-order mechanismDetermine How many mg of a 298 mg sample remains unreacted after twenty three days if 32P decompose by a first-order mechanism, half-life = 14.3 days. |

## Calculate the volume of a chromium atom in microlitersCalculate the volume of a chromium atom in microliters if the volume of a single chromium atom(Cr) =8.10E-24 cm 3 and determine how many copper(Cu) atoms would there be in 159 milligrams of Cu if The mass of a single Cu atom = 1.06E-22 grams. |

## Calculate the current for diffusion-controlled electrolysisCalculate how many atoms of potassium A three mole sample of K2S would have and Calculate the current for diffusion-controlled electrolysis |

## Determine the mass of sucrose that is hydrolyzedsucrose solution is allowed to react for 195 minutes then determine the mass of sucrose that is hydrolyzed? |

## Compute the composition of the crystalsCompute the composition of the crystals and the yield of the process. Also determine the composition of the mother liquor? |

## Calculate the ph of the solutionDetermine the calculated pH of the solution if initially there is 2.0mL of CH3COOH at an initial concentration of 0.89M and 0.80mL of 1.0M Hydrochloric Acid is combined. |

## Determine what percent by weight of sodium carbonateDetermine what percent by weight of sodium carbonate does it contain If the specific gravity of the sodium carbonate solution = 1.25,? |

## Compute the final temperature of the solutionCompute the final temperature of the solution assuming no heat lost to the surroundings .the solution has a specific heat capacity =4.18 J/°C·? |

## Determine the quantity of chargeDetermine which ion will precipitate first and at what concentration of sulfate ion will the first precipitate begin to form? |

## Determine the velocity of the carclockwise direction around a circular track with a constant speed of 200 km/hr. if is at the southernmost end of the track then determine the velocity of the car?also express your answer in M/S |

## Determine the sum of the coefficients of the reactantsBalance the equation using the smallest possible integers. Also determine the sum of the coefficients of the reactants? |

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