...Jennifer turnblom Density Lab Mr. Elliot Science 18 September 2016 density; Density is a way to measure how tightly packed particles are in a object. Objects with more density have less empty space in them (less holey). To find the density of an object its often measured in grams per milliliter (g/ml). To find the density of an object you measure the number of grams it is (mass) then divide by amount of space it takes up ( volume). The final equation should look something like this, v/m=d. To find the density of the 25 objects I will use the formula volume/mass=density. Mass Mass is the quantity of matter in an object regardless of the volume or forces acting upon it. mass is a measurement of the amount of matter in an object Mass is always constant for an object no matter where the object is located The formula for mass is density X volume = mass Mass is measured in kilograms (kg), Grams (g) and milligrams (mg) Mass can be measured using scale, for example if you use an electronic scale. Put the object on the measuring scale then wit until the number stop changing and the number shown is...
Words: 676 - Pages: 3
...Chem 1A Brown 3 July 2014 Density Lab Report Objective: The purpose of this lab was to experimentally determine the density in three different investigations. Prelab procedure outline: What is the Density of an Egg? 1. Obtain the egg and note any observations. 2. Obtain a 400-ml beaker. 3. Add 200-ml of water into the beaker. Record the volume. 4. Place the raw egg into the water and record the volume and any observations. 5. Add NaCl into the water and stir until dissolved. 6. Stop adding NaCl once the top of the egg reaches the meniscus of the water. 7. Determine the density of the egg and the salt solution. Calculations: Beaker = 137g Beaker + Liquid = 337g Mass liquid = 337g – 137g = 200g Density of NaCl solution = 200g / 137mL = 1.46 g/mL Prelab Analysis Outline 1. Subtract mass of empty beaker from mass of filled beaker to calculate mass of liquid. Mliquid=mbeaker+liquid-mbeaker 2. Divide NaCl liquid mass by NaCl liquid volume to find density. D=mliquid/137mL Procedure, Data and Results Obtain egg. Obtained and cleaned 400mL beaker. Weighed the 400mL beaker. 400mL beaker = 137.4635g Filled beaker with 200mL of water. Weighed on analytical balance. Beaker + water = 337g Placed egg in water and noted observations including water displacement. Added NaCl into the solution until the egg floated. Beaker + NaCl solution = 200g Calculated density of NaCl solution. Density of NaCl solution = 200g / 137mL...
Words: 342 - Pages: 2
...201 Laboratory 2: Density Measurement Introduction: The purpose of this laboratory exercise is to introduce basic laboratory measurements, with a specific emphasis on the units of mass and volume. Familiarization with measuring mass and volume, and calculating density from the results will also be executed. The overall goal of the laboratory is for the student to be able to draw conclusions on the relation between the position of metals on the periodic table and their respective densities. Density, or the degree of compactness of a substance, can be easily measured through the ratio of the mass of a substance divided by the volume of that substance. Since mass and volume can be easily measured for solids, liquids, and gases, the density of a substance can be easily defined. Since gases have a smaller density than solids and liquids, they are measured by grams/liter, whereas the former is reported by grams/milliliter or grams/cubic centimeter. In this laboratory exercise, one will measure density in two ways; through density displacement and through direct measurement. We first calculate densities of different metals, such as iron, copper, magnesium, lead and zinc in different forms, such as beads, chips, plates and pieces, by measuring their gross masses and net volumes. In addition, densities were calculated through direct measurement of the masses and volumes of two substances; an iron chip and a copper bead. Finally, the densities of copper pennies were...
Words: 1732 - Pages: 7
...the Unknown Object (Density, Measurement and Error) By: Meena Roberts Discussion Section: Wednesday at 8:30am Objective: The purpose of this lab is to identify what the unknown object is made of. Procedure: Object was placed on digital scale to measure its mass in grams(g). -Mass 1:23.7g Water was poured into graduated cylinder and initial volume was recorded by looking at meniscus in milliliter(mL) -Volume measurement 1: Initial Volume-31.0mL Object was placed into graduated cylinder carefully and final volume was recorded by looking at meniscus in milliliter(mL). -Volume measurement 1: Final Volume-34.0mL The measured volume was calculated by subtracting the final volume from the initial volume in milliliter(mL). Measured...
Words: 363 - Pages: 2
...Lab #3 Measurements & Density Experiment 3A I Purpose: To determine the area of a sheet of typing paper and express the answer in mm2, cm2, and in2. II Equipment/Reagents: A sheet of regular typing paper and ruled provided in lab kit. III Procedure: Measure the length and width of the sheet of typing paper and express this measurement in millimeters rounded to the nearest tenth of a millimeter. Calculate the area of the sheet using the formula: Area= (length)(width) Round your answers to the correct number of significant digits and write the answers in the correct units. Convert your answer to cm2 and in2. IV Data or Observations: Length | Width | Area | 279 mm | 215 mm | 6.00x104 mm2 | 27.9 cm | 21.5 cm | 6.00x102 cm2 | 11.0 in | 8.46 in | 93.1 in2 | V Calculations: (279 mm)(215 mm)= 6.00x104 mm2 (27.9 cm)(21.5 cm)= 6.00x102 cm2 (11.0 in)(8.46 in)= 93.1 in2 VI Results/Summary: The area of the typing paper was found to be 6.00x10^4 mm^2, 6.00x 10^2 cm^2, and 93.1 in^2. Sierra Sisco Lab #3 Measurements & Density Experiment 3B I Purpose: To determine the volume of a rectangular solid and express the answer in mm3, cm3, and in3. II Equipment/Reagents: Rectangular block in lab kit and vernier caliper. III Procedure: Measure the length width and height of of the rectangular solid and express measurements in millimeters rounded to the nearest tenth of a millimeter. Record your answers and calculate the volume...
Words: 1391 - Pages: 6
...Name Date Density Lab Density on Various Objects TITLE: The effect of density on various objects PURPOSE: To observe the effect of density on various objects and use the property of density to identify the composition of unknowns. PROCEDURE ONE: Part A: Floating Cans 1. Five gallon bucket of room temperature water 2. Add can of regular soda 3. Add can of diet soda 4. Record which can floats and which can sinks PROCEDURE TWO: Part A: Floating Eggs in Water 1. Measured the mass of the egg 2. Recorded the mass of the egg 3. Filled the overflow can with plain water to just below the spout and lowered the egg into the can while catching the water that overflowed. 4. Recorded the amount of water overflowed 5. Determined the volume of the egg by measuring the amount of water displaced with a graduated cylinder Part B: Floating Eggs in Salt Water 1. Measured the mass of the egg 2. Recorded the mass of the egg 3. Filled the overflow can with salt water to just below the spout and lowered the egg into the can while catching the water that overflowed. 4. Recorded the amount of water overflowed 5. Determined...
Words: 1111 - Pages: 5
...Density Lab: Look at two sample cylinders. Even though the cylinders are the same size and shape, one has a greater mass than the other. Both cylinders are solid and are not hollowed out anywhere inside. 1. Look at the drawing of the copper and aluminum cubes and their atoms. What are two possible explanations for why a copper cube has a greater mass than the aluminum cube? Hint: Just because the aluminum atoms are larger, they are not necessarily heavier. Explanation 1: Explanation 2: 2. The density of a substance like copper or aluminum is its mass divided by its volume (how much space it takes up). Density = mass/volume or D = m/v. Which is more dense, copper or aluminum? How do you know? 3. **How do you find the density of a cube? Cylinder? 4. **How do you find the volume of a cube? Cylinder? 5. Volume of a cube (length)*(width)*(height) 6. Volume of a Cylinder (pi)*(diameter/2)^2*(height) 7. 8. 9. **How do you find the mass of a cube? Cylinder? 10. Multiply volume and the density 11. 12. Calculate the density of a cube using the following information: 0 Each side is 4 cm long. 1 The mass of the cube is 128 g. 13. Calculate the density of a cylinder using the following information: * The diameter of the cylinder is 5cm * The height of the cylinder is 7 cm ACTIVITY Your group will work with eight samples each with the same volume...
Words: 348 - Pages: 2
...Name:____________________ Density, Buoyancy, and Force Diagrams PhET Lab (rvsd 2/2011) Introduction You’ve heard that oil floats on water. You also know that ice cubes normally float in a glass of water. Why? What causes some things to float in water (corks, ice, dogs) and some to sink in water (rocks, metal spoons, mobsters)? Density is often described as the amount of mass crammed into a volume, and is illustrated by the formula shown below. The units for density are expressed g/cm3, g/mL, kg/m3, and kg/L. In this simulation, we will use kg/L. Water’s density is 1.00 kg/L. Important Formulas: Procedure: PhET Simulations Play With Sims Physics Density * Take a few minutes and familiarize yourself with the simulation before moving on. Free Body Diagrams for Floating Objects: * Grab the various blocks, lift them over the water and drop into the water a few times. * In the boxes at the right, draw free body diagrams for a falling block, block under water, and a floating wood block. * When is the block accelerating? ________________&________________________ * What should be the net force in the vertical direction when the block is floating? _____ The %-Density Ratio Trick * % under = _____________ Estimate the percentage of the wood, ice, and Styrofoam block that is under water while those blocks are floating. Remember: the density of water is 1.00 kg/L % Wood under water | % Ice under water | % Styrofoam under water...
Words: 636 - Pages: 3
...Key Terms In a lab experiment there has to be a detailed written page. On the written page you should include purpose, hypothesis, materials, procedure, observations, conclusion, application, and finally a diagram. Purpose is used to describe why the experiment has to be done. Hypothesis is used before the experiment has started; it is an educated guess or can be said as a prediction. Materials are one of the 4 most important pieces in a lab. Without the materials you don’t know what tools to use for the experiment. Procedure is the second most important part in a lab; it is used to describe how to do the experiment. Without the procedure no one would know what to do and I can assume that experiment won’t turn out so good. Observations, observations are split up into two groups quantitative and qualitative. Quantitative is things measured by volume, mass, numbers, and length. Qualitative is what is observed during the experiment using all 4 senses (see, hear, smell, feel). Conclusion is the second last part to write in a lab, it is telling us if the prediction was correct, and what your group noticed. And finally the application, the application is just a comparison or real life example that can relates to the experiment. And then in the end just need to draw a diagram that looks exactly likes the experiment. Now these are just key words that should be used in an experiment most often. Flow rate is just a rate in which the liquid can flow. It is measured in volume (mL)/Time...
Words: 769 - Pages: 4
...CHM130 Lab 4 Calorimetry Name: Data Table: (12 points) |ALUMINUM METAL | | |Pre-weighed Aluminum metal | | |sample mass (mmetal) |19.88 | |Temperature of boiling water and metal sample in | | |the pot (Ti(metal)) | | | | | | | | | | | |dsdfa(Ti | | |Temperature of cool water in | | |the calorimeter prior to adding hot metal sample | | |(Ti(water)) | | |Maximum Temperature of | ...
Words: 1201 - Pages: 5
...Lab#2: Activity P41: Waves on a string Jonathan Alevy Physics 1302.101 Partners names: Henry Haws, Johnathan Rios & Miguel Castellano Pre-Lab Direct Calculation of the Linear Mass Density 1. Measure the mass of a known of the string. Length = L = 1.77 meters Mass = M = 5.7 x 10-4 kilograms µ = mass/length = 5.7 x 10-4 / 1.77m= 3.22 x 10-4 kg/m Table 1: Change Tension – Constant Frequency and Length Frequency = 120 Hz Length = 1.0 m T=mg T=mg Segments, n | Experimental Mass (kg) | Theoretical Mass (kg) | % difference: Exp-Theo | Tension, T (N) | 1/n2 | 1 | 1.84 | 1.89 | 2.78% | 18.0 | 1.00 | 2 | 0.463 | 0.473 | 2.14% | 4.54 | 0.250 | 3 | 0.207 | 0.210 | 1.44% | 2.03 | 0.111 | 4 | 0.113 | 0.118 | 4.33% | 1.11 | 0.0625 | 5 | 0.0720 | 0.0760 | 5.41% | 0.706 | 0.0400 | Slope= 18 The slope is equal to = 18; = 3.125 x 10-4 kg/m Linear mass density = 3.125 x 10-4 kg/m Table 2: Vary Frequency Tension = 4.9 N Tension = Mass x Gravity = 0.500kg x 9.81m/s2 = 4.9 N Length = 1.0 m Segments, n | Experimental Frequency (Hz) | Theoretical Frequency (Hz) | % difference Exp-Theo | 0 | 0 | 0 | 0% | 1 | 62.00 | 61.68 | 0.520% | 2 | 125.7 | 123.4 | 1.88% | 3 | 189.0 | 185.0 | 2.12% | 4 | 251.1 | 246.7 | 1.76% | 5 | 313.9 | 308.4 | 1.77% | Slope = 62.9 The slope is equal to = 62.9; =3.096 x 10-4 kg/m Linear mass density = 3.096 x 10-4 kg/m Table 3: Results Method | Linear mass density | % difference | ...
Words: 501 - Pages: 3
...Scott Kurashige Jon Grist Fr. 1:30 Lab Density Lab Report Section 1- Introduction The purpose of this lab was to design and perform an experiment which measures the density of two common household objects. The formula for Density = mass/volume. In this lab, density will be determined through two procedures using two objects. The mass of each object will be calculated by measuring it on a balance scale. The volume will be found by using a ruler and measuring it to use a formula for volume. To also find volume, we have to place the object in a graduated cylinder of water to measure the displacement of the water. Density information can be used to explain phenomenon’s like steel and cement ships that can float in water because of the concept of buoyancy. If the density of the ship is less than that of the water or less than the mass of the water it is in, the ship will be able to float even though it is made of steel or cement. Finally, the results obtained in the density lab will be used to determine if the object will float or sink in water. Section 2- Experimental To start off the experiment, we picked two objects and measured them with a ruler. Once we measured the length, width, and height of the objects, we could then find the volume. Once the volume was calculated, the objects were weighed on a balance and then using the formula mass/volume, we calculated the density of the two objects. We also had to find the volume by measuring water displacement. To do this, we...
Words: 695 - Pages: 3
...How is Lab Glassware Used? Luis Cervantes, Ruby Morales, Justin Oursler, Cole Von Roeder Friday September 4, 2015 10:30 am Kaitlyn Mandigo Section L52 Introduction: The intention of this investigation was to find the most precise and/or accurate glassware. Precision is how close the measured values are to each other, and accuracy is how close the measured value is true to the value. To do this different laboratory glassware was used to measure out density of water. Density is the ratio of an object’s mass (grams) to its volume (mL or cm^3). Therefore once we knew the mass and volume of the water being used then the density was calculated using the following formula: Density = mass/volume This calculated density was then be compared to the expected, theoretical density of water at the current temperature (°c) by using the following percent error formula: % Error = (experimental-theoretical)/theoretical Additionally, significant figure rules are used to ensure accuracy in this lab. With this information on all glassware, it was determined which lab glassware was the most precise and/or accurate. Procedure/Experiment: This experiment required many different kinds of glassware to be used in order to successfully carry out the experiment. The types of glassware and other tools used are as follows: 50mL beaker, buret, electronic balance, 125mL Erlenmeyer flask, 10mL graduated cylinder...
Words: 1674 - Pages: 7
...Density [pic] Part 1 Problem: How can you determine the density of water? Hypothesis: If we measure 25 mL, 50 mL, 75 mL, and 100 mL of water, and measure all of these amounts on an three beam balance, then we can find the density of water using the density formula. Procedure: 1. Clean and dry the pan on your balance. 2. Zero your balances. 3. Determine the mass of a 100 mL dry graduated cylinder. Record in Data Table I. 4. Measure the following volumes of water: 25 mL, 50 mL, 75 mL, and 100 mL. record the mass of the water and the graduated cylinder in the data table. 5. Record the mass of just the water. 6. Determine the density of the water for each volume. (D = M/V) 7. Determine the average density. 8. Make a graph showing Mass (g) versus Volume (mL) using a best fit line. Data Table I |Volume of Water |Mass of Water and |Mass of Water |Density of Water (D = | | |Grad. Cylinder | |M/V) g/mL | |O mL |98.20 | | | |25 mL |127.00 |28.80 |1.152 grams/mL | |50 mL |145.40 |47.20 |0.944 grams/mL | |75 mL |172.50 |74.30 |0.991 | |100 mL |196.00 |97.80 |0.978 grams/mL | |Average density ...
Words: 1401 - Pages: 6
...Formal Lab Report Title: The Densities of Liquids and Solids compound. Abstract: In this experiment we will determine the density of liquid and a solid by two quantities of mass and the volume of a given quantity of matter.To properly measure density,we need container whose volume is known to a high degree of accuracy. This container is known as a flask and stopper. Introduction: Density is the ratio of the mass of a substance or object to its volume. At any given temperature, the ratio of mass to volume is characteristic for a given substance.Common liquids and solids of various densities are layered in a beaker. The liquids form different layers and the solids float at the interfaces between them. This demonstrates that a solid's ability to float or sink depends on its density relative to the liquid it is in.The physical properties of a pure substance are those that can be measured without changing the composition of the substance. The density of a substance is an intensive property of the substance. The property is independent of the mass of the substance ( intensive ). The density of a substance is a measure of the mass of the substance per volume occupied by the substance. The density of solids and liquids are generally given in units of grams per milliliter, while for gases the units are grams per liter. We will be determining the density of water, the density of an unknown liquid, the density of a regular solid and the density of an irregular...
Words: 1252 - Pages: 6
