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Announcements

Announcements

Announcements. Prelaboratory Assignment due at the beginning of lab tomorrow (pg. 42 of lab book). Proper dress required for lab! Online HW 4 (Type II) due tomorrow by 7:00pm. Online HW 5 (Type I) due Monday 10 /21 and (Type II) due Wednesday 10 /23. Clicker #1.

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77 views • 7 slides
Clicker #1

Clicker #1

Clicker #1. Which is lower in potential energy and more stable? unburned match or burned match A) unburned match B) burned match. Example #1. Is the freezing of water an endothermic or exothermic process? (The system is underlined.) Exothermic. Clicker #2.

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72 views • 7 slides
Clicker #1

Clicker #1

When lead(II) nitrate and potassium iodide are mixed, what precipitate will form? Pb(NO 3 ) 2(aq) + KI (aq) ? A) KNO 3 B) KI C) Pb(NO 3 ) 2 D) PbI 2 E) No precipitate will form. Solubility Rules Most nitrate salts are soluble.

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241 views • 5 slides
Clicker #1

Clicker #1

Clicker #1. Which of the following supports why Lewis structures are not a completely accurate way to draw molecules? A) The Lewis structure for O 2 shows all electrons as paired but when liquid O 2 is poured onto a magnet, it behaves as a molecule with an unpaired electron.

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59 views • 5 slides
Clicker #1

Clicker #1

Clicker #1. You add 300.0 mL of water to 300.0 mL of a 2.00 M sugar solution. How many of the following will change? I. total volume of the solution II. moles of solute in the solution III. mass of solute in the solution IV. concentration of the solution

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231 views • 4 slides
Clicker #1

Clicker #1

Clicker #1. Balance the following equation in standard form and determine the sum of the coefficients: C 2 H 5 OH + O 2 ? CO 2 + H 2 O A) 4 B) 5 C) 8 D) 9 E) 10. Clicker #2. How many of the following statements are true about balanced chemical equations?

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205 views • 4 slides

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