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By David A. Ucko

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2. How do you know that sucrose contains carbon? E X P E R I M E N T 2C 1. What is the basis for the arrangement of elements in the periodic table? 2. How do metals differ from nonmetals? 23 NAME SECTION DATE Chemical bonding EXPERIMENT 3A OBJECTIVE: To demonstrate the formation of covalent and ionic bonds. A bond is the chemical "glue" that holds atoms together. It may result from the sharing of electrons (covalent bond) or the transfer of electrons (ionic bond). Using the cutouts from Figure 3-1, show the formation of the following covalent compounds, as illustrated for hydrogen, H 2 .

How does the pressure of a gas change with increasing temperature? State the law describing this relationship. rubber stopper Figure 5-2 Apparatus for pressure—temperature experiment. 49 UCKO/EXPERIMENTS FOR LIVING CHEMISTRY/5 E X P E R I M E N T 5B OBJECTIVE: To prepare oxygen. EQUIPMENT: 25 X 200 mm test tube test tubes (2) 500-ml beaker tubing CHEMICALS: potassium chlorate manganese dioxide stoppers splints steel wool test tube holder or tongs Oxygen is a colorless, odorless gas that makes up about 20% of the air you breathe.

Add 60 ml of water to a 100-ml beaker and 60 ml of mineral oil to a second 100-ml beaker. ) Place each beaker on a ring stand, and heat with the Bunsen burners until they reach 80°C. Then record the temperature of each beaker every minute for 10 minutes. Minutes Water temperature (°C) Mineral oil temperature (°C) 1 2 3 4 5 6 7 8 9 10 Which substance has a greater heat capacity? NAME SECTION DATE Figure 6-1 Urinometer. 4. Specific gravity. Obtain a urinometer (hydrometer) and a cylinder. Fill the cylinder in turn with each of the solutions listed below.

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