CHEM1201 Lecture Notes - Ethylene Glycol, General Algebraic Modeling System, Umber
7 Jun 2018
School
Department
Course
Professor
Chemistry Fri 03/03
Pre-lab activities:
-read experiment before starting
-due 5pm the day before lab session
-single attempt
Tutorial questions
**for the Competency test:
- learn the names-symbols of the periodic table for the first 30 elements
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Density:
-can be measured
-what do we mean if we say one substance is more dense than another? Occupy the same
space (same volume) but one is heavier.
Element/compound
-water
-silver
-nitrogen
1 cm3 = 1 mL
g/mL = gcm^(-3)
g/mL = mass/volume = density
1. 10.0 g of sulfur fills a 5 mL sample vial. What is the density of sulfur?
density = 10g/5mL = 2.00gcm^(-3)
2. Ethylene glycol is widely used as antifreeze in cars. It has a density of 1.1gcm^(-3). What is the
mass in gams of 56 L of ethylene glycol?
P = density = m/v
m = v x P = 1.1gcm^(-3) x 56L = 1.1 x 56000 = 61600 g
Elements:
-one element on the periodic table is different to th others because it is made up of different
amounts of its parts
-Atoms:
- Protons and neutrons in the nucleus
- electrons orbiting it
-All parts of the atom contribute to its properties and reactivity
Element defined by the number of protons
-the umber of protons defines the element and is described by the atomic number (Z)
Periodic Table:
-atomic number (Z)
- the number of protons in the nucleus
- eg Z = 2 is He
-chemical symbol
- eg Al (aluminium), Cu (copper)
-name
-atomic mass
Density
1.00g/cm^3
10.49 g/cm^3
0.00125 g/cm^3 = 1.25 x 10^(-3) g/mL
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Due 5pm the day before lab session. Learn the names-symbols of the periodic table for the rst 30 elements. Occupy the same space (same volume) but one is heavier. 1 cm3 = 1 ml g/ml = gcm^(-3) 0. 00125 g/cm^3 = 1. 25 x 10^(-3) g/ml g/ml = mass/volume = density: 10. 0 g of sulfur lls a 5 ml sample vial. What is the density of sulfur? density = 10g/5ml = 2. 00gcm^(-3: ethylene glycol is widely used as antifreeze in cars. P = density = m/v m = v x p = 1. 1gcm^(-3) x 56l = 1. 1 x 56000 = 61600 g. One element on the periodic table is different to th others because it is made up of different amounts of its parts. All parts of the atom contribute to its properties and reactivity. The umber of protons de nes the element and is described by the atomic number (z) The number of protons in the nucleus.
