What role does water play in keeping temperatures from fluctuating dramatically? A. Wateris an acid, A. Wateracts as a bulfer. C. Wateris a versatile solvent. D. Water has a high heat capacity. 4. If you were to heat 1 cup of water and 5 cups of water on a hot plate at the same temperature, which one would boll first? __ Using your knowledge of hydrogen bonds and the polarity of a water molecule, explain why. __ __ 3 Questions 1. Reference 5C.912.L.18.12 -The Properties of Water benchmark from the top of the handout. Which of those properties of water referenced in the benchmark were you observing in this experiment? __ 2. In the following example ,identify the solute, the solvent, and the solution.Ricardo is thirsty after mowing the grass and decides to come inside and make a glass of sweet tea.He adds sugar to the unsweetened prepared tea and stirs the liquid until all the sugar has disappeared from the pitcher. Solute - __ Solvent - __ Solution - __ Imagine you were given an unknown dry substance and you added it to water and no matter how much you heated up the water or stirred the unknown substance, it wouldn't dissolve in the water. What conclusions could you draw about the types of bonds and charges on the substance because it doesn't dissolve in water? __

48. What charge would an oxygen atom with 10 electrons have?

2. Give three examples of synthetic products made from plants or animals.

Which of the following is an isomer of $H-\underset {H}{H}-C\equiv C-\underset {H}{H}-\underset {H}{H}-H$ 2-pentene 1-pentyne pentane

2) What charges would Aluminum, chlorine and calcium ions have?

45) Explain the differences between an ionic bond and a covalent bond. 46) What is the difference between a polar covalent and nonpolar covalent bond? 47) How can you determine whether a bond is ionic or covalent? 48) Classify these bonds as ionic bonds or covalent bonds: a. Br-br b. N-O c. K-Br d. $Mg-S$ 49) Explain the main characteristic of a metallic bond.

Explain why ionization energy decreases as you move down a group. Atomic radius decreases Electrons are added to the same energy level Nuclear charge decreases Outer electrons are farther from the nucleus and more shielded

Name or give formulas for the following compounds. a) $Na_{2}SO_{4}$ __ b) Strontium Oxide __ c) AuCl __ d) Iron (II) Chromate __ e) Carbon Tetrachloride __ f) $C_{2}O_{7}$ __ g) $Cu(NO_{3})_{2}$ __ h) $(NH_{4})_{2}CO_{3}$ __

The strength of the dipole-dipole interactions __ with the number of electrons in a molecule. a Increases b Decreases C Remains constant d First increases and then decreases

Changing from one element to another is called transmutation isotopic change radioactivity

d. What volume of 5:00 M Kl stock solution is needed to make 250. mL of a 1.50 M solution? 833 mL 0.030 oml 33.3 mL 75.0 mL