If the pressure exerted by ozone, O3, 3.0x10-3 atm and the temperature is 247 K , how many ozone molecules are in a liter?

Find mean-standard error of sampling distribution : Find the mean/standard error of the sampling distribution of the proportion. Assume that 26% of students at a university wear contact lenses. We randomly pick 300 students. |

Which confidence interval estimate will be larger : Given the same sample mean and the same sample size which confidence interval estimate would be larger and why: One with a 90% confidence level or one with a 95% confidence level? |

What ethical arguments relating to human : What ethical arguments relating to human use of natural resources are relevant to the use of ecological calculators? |

Explain how far does the car go before it stops : the driver sees a child standing on the road. She takes .80 s to react, then steps on the brakes and slows at 6.5 m/s squared. Explain how far does the car go before it stops? |

How many ozone molecules are in a liter : If the pressure exerted by ozone, O3, 3.0x10-3 atm and the temperature is 247 K , how many ozone molecules are in a liter. |

Difference between environmental science and environmentalis : What is the difference between Environmental Science and environmentalism? What are 3 of the fields of knowledge that Environmental Science draws on? |

Which an assignment of probability must obey : An assignment of probability must obey which of the following? The probability of any event must be a number between 0 and 1, inclusive. |

Demonstrate that fidel castro is a world leader : Fidel Castro: using the leadership process, demonstrate that Fidel Castro is a world leader. How does the "personal traits" theory apply in his case |

How would you check your unknown : What results would you expect if your unknown contained riboflavin, pryidoxine, or both? |

## Calculating equilibrium constant for the reactionsCalculate the equilibrium constant for each of the reactions at 25 ° C .O 2 (g)+2H 2 O(l)+2Cu(s)→4OH - (aq)+2Cu 2+ (aq) Express your answer using one significant figure. |

## How many feet will it travelAn alien rocketship is traveling at a speed of 40 inches per minute. At this speed, how many feet will it travel in 1 second? Round to the nearest thousandth. |

## Calculate the molar mass of the gasUsing a solution containing 0.302 grams of an antibiotic has an osmotic pressure of 8.34 mmHg At 23.6°C, 0.500 L. calculate its molecular mass. |

## Determine the density of solid kryptonKrypton crystallizes as a fcc (face centered cubic unit cell) having an edge length of 559 pm. What is the density of solid Krypton? |

## Find out what will be the half-livesFind out what will be the half-lives if [NOBr]o = 0.054 M - The rate constant for the second order reaction Is 0.80 M-1s-1 at 10 degree celsius temperature |

## What is the total force on the outside of the canA buffer solution containing 0.25 M Acetic acid and 0.56 m Sodium acetate. After addition of 0.0060 mol HCL what is Ph of buffer. |

## What phase or phases are presentConsider a 53.5 g sample of H2O(g) at 117°C. What phase or phases are present when 134 kJ of energy is removed from this sample. |

## Determine at what temperature must a balloon be heatedDetermine at what temperature must a balloon be heated to have six Litres volume consider that the balloon was at the temperature of 25 degree Celsius and volume of two litres initially? |

## Determine what is the observed rateThis given reaction: 2 O3(g) -→ 3 O2(g) has an empirically determined rate law (with a single unimolecular event). Determine what is the observed rate If k =4.0 × 105s-1, [O2] = 0.2M and [O3] = 0.5 M? |

## Estimate thickness of the oil film ( in cm)consider a major oil spill in a lake ( a prototype situation related to Alaska Oil Spill few years ago and many subsequent spills) Amount of oil spilled is 2.9 mega gram (Mg). |

## To what height does the water rise in the graduated cylinderYou have a 100.0- mL graduated cylinder containing 50.0 mL of water. you drop a 115-g piece of brass into the water. To what height does the water rise in the graduated cylinder. |

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