University:
High School
Course:
High School Physics
Academic year:

2021
Views:

466

Pages:

3
Author:

onrijp69

DENSITY: Formula found: Table T Values for elements ONLY (add H₂O) D = M/V D = Density g/cm³ M = Mass - g V = Volume - cm³ Example #1: What is the mass of 25 cm³ of sodium metal? D = M/V 0.97 g/cm³ = M / 25 cm³ M = 24.25 g Example #2: A piece of metal has a mass of 68.1 grams and its' volume is found to be 15 mL by water displacement. What is the metal? D = M/V = 68.1 g / 15 mL = 4.54 g/mL Table (closest Ti) → 4.506 g/mL Example #3: Graph the following set of data: Mass | Volume 40 grams | 5.6 mL 60 grams | 8.4 mL 90 grams | 12.6 mL 100 grams | 14 mL 150 grams | 21 mL [Graph of Mass vs. Volume with data points plotted] a. What is the metal? b. Using the graph, what is the mass of 10 mL of this metal? 14.28 g c. Using the graph, what is the volume of 80 grams of this metal? 11.4 mL d. Draw in a line on your graph to represent a metal with a greater density. HIGHER Slope (A) Interpreting Mass vs. Volume Graphs Graphing is a very important tool in science since it enables us to see trends that are not always obvious. Graph the following data and answer the questions below. [Data Chart] Mass of substance (g) Volume of substance (cm³) 5 g 5 cm³ 25 g 25 cm³ 50 g 50 cm³ 55 g 55 cm³ 65 g 65 cm³ [Graph of Mass vs. Volume] Using the graph and data chart try to figure out if you increased the substance to 55 mL, how many grams would the substance have. 55 grams How much space would 65 g of the substance take up? 65 cm³ As the volume of a sample increases from 20 ml to 30 ml, does the mass increase or decrease? INCREASE Calculate the Density of the substance. Show your work! D = M/V Choose any point on data set 1 D = 50 g / 50 cm³ = 1 g/cm³ According to your calculation of density which substance is graphed? Substance Density Hydrogen 0.00009 g/mL Mercury 13.5 g/mL Carbon 2.3 g/mL Water 1.00 g/mL Sucrose 1.6 g/mL Water NOTE: 1ml = 1cm³ 6. Graph the following mass and volume numbers on the graph below. This graph is a line graph and will look like the graph on the other side of the homework. Mass of liquid1 (g) Volume of liquid (cm³) 20 4 100 20 75 15 40 8 10 2 Density of Unknown Substance Line Graph [A line graph is plotted with "Mass (g)" on the y-axis and "Volume (cm³)" on the x-axis. Data points are plotted and connected to form a straight line.] 7. As mass increases, what happens to the volume? Volume INCREASES (Direct relationship) 8. As volume increases, what happens to the mass? Mass INCREASES 9. Find 12 mL on the volume line. Follow that line until it touches the line you drew. How many grams would it be? 60 g 10. What volume would 90 g occupy? 18 mL