Chem 210 Lab Exam 1 ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
Know All the lab safety Rules For Example...
No Food or Drink.
Wear Your PPE and Proper Lab Attire.
Good Hygiene.
Use Proper Storage Containers.
Label Your Work Space.
Don't Work Alone.
Stay Focused and Aware of Your Surroundings.
Participate in Safety Exercises.
LAB 1: Density Prefixes and their meaning are found in the attached diagram
Know basic metric (or SI) units and the meaning of the
common prefixes attached to them
Determine the correct number of significant figures to Look at the picture silly
use for the result of any calculation (+ - × ÷)
, Understand density calculations, concepts, and units; Density = Mass / Volume
solve for any unknown variable More Dense = more molecules (mass) per 3D area
Expressed in units such as cm3 and ml
Measure the density of liquids and of regularly-shaped Finding the Density of Liquid
and irregularly-shaped solids (Measured Mass in grams) divided by (the total volume of that the liquid occupies)
Finding the Density of Regular Shapes
(mass in grams) divided by (length x width x height)
Finding the Density of Irregular Shapes
(measured mass in grams) divided by (total displacement of water when the
object is fully submerged)
Use a graph and/or the equation of its best-fit line to find observe the attached example
an unknown y from a given x (or vice versa)
Calculate an object's percent composition based on 1. Determine Overall Density of the Penny
densities, such as the %Cu and %Zn in a penny D=m/v
2. Write an Equation to determine percent of composition for each material.
(Cu g/ml) (x) + (Zn g/ml) (x-1) = Overall Density of a Penny
Given density, mass, and some dimensions of an object, 1.) Rearrange the Density equation to solve for the desired variable
calculate its other dimension (e.g. thickness of Alfoil) i.e. - D=m/v --> v=m/D
2.) Plug in your knowns and do math
LAB 2: Light and Atomic Spectra * The longer the wavelength, the less energy
Know the electromagnetic spectrum and its relationship * The shorter the wavelength, the more energy
to energy, particularly in the visible region - Violet = Highest Energy
- Red = Lowest Energy
Know All the lab safety Rules For Example...
No Food or Drink.
Wear Your PPE and Proper Lab Attire.
Good Hygiene.
Use Proper Storage Containers.
Label Your Work Space.
Don't Work Alone.
Stay Focused and Aware of Your Surroundings.
Participate in Safety Exercises.
LAB 1: Density Prefixes and their meaning are found in the attached diagram
Know basic metric (or SI) units and the meaning of the
common prefixes attached to them
Determine the correct number of significant figures to Look at the picture silly
use for the result of any calculation (+ - × ÷)
, Understand density calculations, concepts, and units; Density = Mass / Volume
solve for any unknown variable More Dense = more molecules (mass) per 3D area
Expressed in units such as cm3 and ml
Measure the density of liquids and of regularly-shaped Finding the Density of Liquid
and irregularly-shaped solids (Measured Mass in grams) divided by (the total volume of that the liquid occupies)
Finding the Density of Regular Shapes
(mass in grams) divided by (length x width x height)
Finding the Density of Irregular Shapes
(measured mass in grams) divided by (total displacement of water when the
object is fully submerged)
Use a graph and/or the equation of its best-fit line to find observe the attached example
an unknown y from a given x (or vice versa)
Calculate an object's percent composition based on 1. Determine Overall Density of the Penny
densities, such as the %Cu and %Zn in a penny D=m/v
2. Write an Equation to determine percent of composition for each material.
(Cu g/ml) (x) + (Zn g/ml) (x-1) = Overall Density of a Penny
Given density, mass, and some dimensions of an object, 1.) Rearrange the Density equation to solve for the desired variable
calculate its other dimension (e.g. thickness of Alfoil) i.e. - D=m/v --> v=m/D
2.) Plug in your knowns and do math
LAB 2: Light and Atomic Spectra * The longer the wavelength, the less energy
Know the electromagnetic spectrum and its relationship * The shorter the wavelength, the more energy
to energy, particularly in the visible region - Violet = Highest Energy
- Red = Lowest Energy
