1. What is avogadro's number represent?

2. How many atoms of xenon are there in one mole of xenon?

3. Differentiate empirical from molecular formula.give example for each.

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Explain what is avogadro''s number represent : What is avogadro's number represent. How many atoms of xenon are there in one mole of xenon |

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Determine the magnitude and direction of the impulse : After a 0.250-kg rubber ball is dropped from a height of 1.80 m, it bounces off a concrete floor and rebounds to a height of 1.20 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. magnitude? direction? |

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## What is the half-life of the material?"A sample of a particular radioisotope is placed near a Geiger counter, which is observed to register 160 counts per minute. Eight hours later the detector counts at a rate of 10 counts per minute. What is the half-life of the material?" |

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## State water over the temperature rangeAssume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 \rm J/(g\K), as water over this temperature range. I got 1.64 x 10^20 photons for my answer, but i keep getting told that x 10 is not supposed to be in the .. |

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