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3. The metallic atoms change from a liquid state to a gas state during the flame test. Is this a physical or a chemical change? Explain. This is a chemical change because a new color is created and it is exciting the electrons. Burning is a chemical reaction because there is a new substance being created

Step 1: The volume of the quarter-sphered tank rounds up to 478,676. You use the condition to find the volume. Volume of Sphere: V=4/3(3.14)R^3 V=4/3(3.14)(70)^3 V=4/3(1,077,020) V=478675.5555555556 – I ran this through plag checker I don’t know if it’s saying plagiarized because others have used this answer or not so if there is another way to write this answer change it. Step 2: The volume of both tanks is equivalent to 84,780. You utilize the recipe, and module the numbers to get the

Surfactant Lab Report: Gas Exchange In the Respiratory System Amanda De Los Santos Texas State Technical College 4/28/16 Introduction This experiment was conducted to show the importance of a surfactant using common household items and demonstrating how surface tension works in the respiratory system. Surface tension, according to Marieb and Hoehn, is when water molecules in the alveoli lining are attracted to each other and draw each other to a smaller dimension (Marieb & Hoehn, pg. 715)

Discussion Results obtained from the experiment were consistent with the hypothesis and expected values. The alternative hypothesis is accepted. Manipulated ventilation patterns altered the alveolar gas compositions. Alveolar partial pressure of O2 and CO2 baseline values of normal breathing was recorded as 108.06mmHg and 42.51mmHg respectively. When the subject was instructed to breath-hold after normal breathing results obtained showed a significant decrease in pO2 (p=7.11e-20) and significant

apparatus in separating a certain amount of a 3:2 mixture of cyclohexane and toluene into three fractions of distillates, and then analyzing the retention time of the samples through the separation of the components in an oven containing helium gas via gas chromatography for verification. Distillation is a wide-range laboratory technique used to separate and purify liquids based on the differences between their conditions.1 Mixtures of liquids with different boiling points are heated

Experimental design Investigative Question: Will different liquids cause the liquid to rise more under constant pressure and temperature? Hypothesis: If salt, sugar, and vinegar solutions were tested by putting them in a container and setting it under a lamp to see which will rise the highest, the the water with salt will rise the highest. Independent Variable: The liquids used for thermal expansion. Dependant Variable:Which liquid solution would rise the highest in a controlled setting Control

Simple Distillation and Gas Chromatography The objective of the lab was to purify compounds that can be turned into gas at a reasonable temperature without using decomposition. Gas chromatography was also used to identify the proportions of the volatile compound in the different samples. The mixture of hexane and octane was assigned to me and my partner. The apparatus for simple distillation was assemble using a thermocouple, air condenser, distillation head, metal keck clamps, and a conical reaction

done, the footballs were filled with the different gases. The filling of the footballs were done in Mr. Frazier’s physics room at the Southwest Virginia Governor’s School. The first step in order to fill the footballs was to clamp one of the Helium gas cylinder to

properties that are transitions from one state to another, such as vaporization, this is the process by which a liquid or in some cases a solid that can change into a gas. Evaporation is a similar form of vaporization. However, evaporation is defined as the process by which particles escape from the surface of a non boiling liquid and enter the gas state. Some lab experiments can be conducted to actually see the effects of evaporation. Like the liquid bromine lab where you add a small amount of liquid bromine

classified is, what phase the matter is in. There are five phases matter can go through, solid, liquid, gas, plasma, and super critical point. Solid is when the molecules are all in an organized and compact pattern, except for ice, which had a honeycomb pattern making it have more space in between molecules. Liquid is when the molecules are semi close together, but they can move freely between each other. Gas is when the molecules are far apart from each other and will continue to expand from one another