These are the density‚ relative error and the standard deviation. Density is refers to the mass (m) per unit volume (V) of a material and is often represented by the symbols d or ρ‚ where d = m/V. The density of an object changes with pressure and temperature. Second‚ relative error is a calculated by finding the difference between the true and measured values and dividing this difference by the true answer. And‚ the standard deviation is the measure of the spread of dispersion of scores (density) from
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existence. While “coastal deserts” are mildy warm and get some rainfall and “cold” deserts are cold. 2 Climate: Temp: The average temperature for this desert is 86 degrees Fahrenheit with the hottest ever recorded being 122 degrees. With freezing temperatures in the winter the climate of the Sahara is one the of the strangest on the planet. Temperature swings of 37.5 to 99.5 have been recorded. Rainfall: the average rainfall for the Sahara is just 2.5 cm and in the eastern parts it only
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diene and dienophile‚ which are energetically more stable than the π-bonds. During the Diels-Alder reaction‚ the temperature should be kept between 60-70 ℃. Because the boiling point of the butadiene is low and do not let it vaporize. After cycloaddition‚ pour the reaction mixture into 50 ml water under room temperature‚ the product would precipitate because of the low temperature. The acid added for the hydrolysis part is very important because acids have been used to accelerate the rate of the
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The purpose of the following study is to determine where the two unknown bacteria acquired in Microbiology lab should be classified in regards to temperature‚ pH level‚ and osmoregularity. It is important to classify bacteria in order to identify them. Identification of bacteria is important because they are not only useful but potentially dangerous as well. The identification of bacteria can lead to breakthroughs in healthcare regarding treatment of old and new diseases alike. Identifying bacteria
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Enzyme kinetics Purpose: The goal of this investigation was to measure the amounts of products made and see the different elements that that affect the rate of breakdown of p-Nitro phenol in the absence or presence of cellobiase….. Methods: Activity #1 The materials used for this activity are as follows: 1.5 mM substrate‚ enzyme‚ Stop solution‚ buffer‚ DPTPs‚ 15 ml conical tubes‚ cuvettes‚ marker‚ beaker‚ distilled water‚ spectrophotometer‚ stop watch. First four 15 ml conical tubes
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2.State what is meant by the internal energy of a substance. sum of kinetic and potential energy of atoms / molecules‚ due to random motion. 3.Explain why an increase in internal energy of an ideal gas is directly related to a rise in temperature of the gas. kinetic energy
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experimental study of thermodynamics.3 Le Chatelier’s principle states what will happen to a system if a condition such as concentration‚ temperature‚ or pressure moves the system away from equilibrium.2 When the equilibrium of a system’s concentration is disturbed‚ the equilibrium position will shift toward the side
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boiling points between the substances must be more than 40 to 50 degrees C. A fractional distillation column is needed in a fractional distillation. The column in a fractional distillation column provides a temperature gradient where the temperature is lower at the top of the column and the temperature is greater at the bottom at the column. In the first step‚ the unknown solution was added to a round bottom flask with a stir bar. The reason the stir bar was needed‚ was because the solution would not
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Radiation The three types of heat transfers are Conduction‚ Convection‚ and Radiation. Heat always moves from a warmer place to a cooler place. For example hot objects that are in a room that is cooler than the temperature of the object will eventually cool to room temperature. First is conduction‚ conduction is heat transferring through direct contact of substances. Then convection‚ which is the transfer of heat by the movement of the warmed matter. Lastly radiation is electromagnetic waves
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masses‚ can be seen and used daily in chemistry. In this lab‚ the ideal gas law helps determine and evaluate the molar mass of gases and volatile liquids. The ideal gas law compares four properties of a gas which include pressure‚ volume‚ moles‚ and temperature. During this experiment‚ the moles would be unknown‚ in effect the student must use a substance mass divided by its molar mass. With this‚ the ideal gas law can be arranged in an equation fit for helping the student determine the molar mass of a
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