The purpose of this lab was to observe the rate of osmosis and diffusion‚ as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion‚ that dealt with raisins in different liquid environments‚ each with a different concentration of sugar. Part IV of the lab was using the same idea as the demonstration‚ by putting objects in different concentrations of a substance; in this case elodea leaves in salt water. In both cases‚ the
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generalized expression: Fluid properties influence all three components of recovery efficiency. 1. Viscosities are found in the definition of mobility ratio‚ which affects areal and vertical sweep efficiency‚ including viscous fingering. 2. Phase densities define the degree of gravity segregation‚ which in turn affects vertical sweep efficiency by gravity bypassing (tonguing) in gravity-dominated processes. 3. Interfacial tensions‚ viscosities‚ inter-phase mass transfer (i.e. vaporization and condensation)
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Rain water A sprayer works on the principle expounded by A. Newton B. Archimedes C. Boyle D. Pascal Cloudy nights are warmer because A. clouds prevent radiation of heat from the ground into the air B. of low atmospheric pressure C. of the compact density of air D. more dust particles gather in the air A moving body on earth ordinarily comes to rest by itself because of the A. law of inertia B. force of friction C. conservation of momentum D. gravity An isotherm is a line joining places having equal
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Density Lab January 24‚ 2014 Benjamin I. Purpose- The purpose of this lab is to identify the unknown substances by calculating the densities of the given substances then comparing those densities to the actual densities on the table given. II. Materials- Graduated cylinders Triple beam balance Unknown substances from bag given by teacher Table of known densities Calculator Water III. Procedure- The first thing one must do to identify which substance is which is to calculate the
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measurements using density as an example. The density of a sample will be found experimentally and compared to a known value. The relationship of averages and different analysis techniques to percent error will also be explored. Density is a characteristic of a substance which can qualitatively be described as the amount of matter (mass) squeezed into a given space (volume). The density of substance remains the same no matter the size of the sample at a given temperature. Quantitatively‚ density can be expressed
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Zinc in Pennies from Density Lab Report Procedure: For pre-1982 pennies- Mass 10 pennies‚ record data. Fill a 100mL graduated cylinder to 40mL or enough to fully submerge the pennies with water‚ record the volume in data table. Carefully place the pennies into the graduated cylinder‚ record the final volume of the water in data table. To find the volume of the pennies‚ subtract the final volume from the initial‚ record the data. Repeat this procedure twice more. Use the density formula to calculate
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solvent Pressure of solution containing unknown mu = 8.69 g mp = 250 g Find Calculate the molar mass Mw‚u of this unkown compound. Strategy We’ll start with Raoult’s Law (eq 5.21 on pg 164) which relates the partial pressure pa of a liquid in a solution to its pure vapour pressure p∗ by its mole fraction in solution χa . a pa = χa p∗ a This allows us to calculate the mole fraction of 2-propanol χp (in the solution with the dissolved unknown) to the solutions vapour pressure pp
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The Density of a material may be determined by determining the mass and volume of a sample material and calculating the mass/volume ratio. An independent variable is the variable that is being manipulated or changed during the experiment. The dependent variable is the variable that is being measured. The independent variable for this experiment is the copper because you are only changing the amount of copper you use. The dependent variable is the density because we are measuring the density. In
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3.6 cm high‚ 4.21 cm long‚ and 1.17 cm wide. If the mass is 21.3 g‚ what is this substance’s density (in grams per milliliter)? * Volume= 3.6*4.21*1.17= 17.7g * Density= mass/volume= 21.3/17.7= 1.2g/mL * Density= 1.2g/mL D. A sample of gold (Au) has a mass of 26.15 g. Given that the theoretical density is 19.30 g/ml‚ what is the volume of the gold sample? * Volume= mass/density= 26.15/19.30= 1.35mL * Volume= 1.35mL E. What would happen if you dropped the object into
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[pic] Soap From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search For other uses‚ see Soap (disambiguation). [pic] [pic] A collection of decorative soaps‚ often found in hotels [pic] [pic] Two equivalent images of the chemical structure of sodium stearate‚ a typical soap. In chemistry‚ soap is a salt of a fatty acid.[1] Soaps are mainly used as surfactants for washing‚ bathing‚ and cleaning‚ but they are also used in textile spinning and are important components of lubricants
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