Your friend Sally lives in Canada and is not familiar with the Farenheit scale. She wants to know what the average high temperature is in July in Phoenix, Arizona. Use the chart and the formula below to calculate the Celsius temperature for Sally. Conversion Formulas: Cº = (Fº - 32º) 1.8 Fº = 1.8 x Cº + 32º K = Cº + 273 Giving 20 pts

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72