Mankind has always relied on nature, and used it's seemingly plentiful resources to satisfy one's needs. But with the growing number in population world wide, it has put an exponential amount of stress on the resources needed to survive. This is due to the simple mathematics of the population worldwide, seen by a prominent English mathematican and demographist named Thomas Malthus, who predicted a population equation that stated with the growth of population would come the loss and underproduction of necessary resources. If continued, mankind would not be able to grow and progress more without destroying nature. From 2-5 million years ago there was considerably less than one billion people on this earth, and with that small number of people, remained the vast number of resources used to breed more people, as seen in the pond fly example. Flies are attracted to certain ponds because of the ideal conditions, and because of those conditions, comes an inevitable boom in population. The overpopulation causes the flies to cover the entire pond, effectively blocking out the sun needed to grow the nutrients the flies thrive off of. When the nutrients slowly disappear because of subpar conditions, the flies too then begin to slow in grow and disappear because they are no longer adequately being served for survival. With the imbalance of people to resources, mankind as sprung into a population boom that has the numbers grow increasingly more per year. On a graph, this would appear to be a steep curve for the population line, almost at a ninety degree angle for it's growth. At the rate predicted by Malthus, the world should hold around nine billion people by the year 2050 AD. To put that in perspective, if one lived to be eighty years old, the population of the world would triple in one's lifetime, all while nature stayed the same and nonrenewable resources dwindled. Over the last century, a swell of negative indicators of global health has been on the rise. Of this lists includes topics such as demand for clean water, global surface temperature, ozone depletion, consumption of oceans resources, species extinction, carbon dioxide concentration, deforestation, and global sea levels. These indicators have been on the rise for the last hundred years, but recently have begun to accelerate at increasingly faster rates in sync with the rise in population. The fastest raising of these issues is the rise in ozone depletion which directly correlates to the rise of surface temperature seen on Earth. With the increase in the…
values were made and plotted in a thermometer calibration graph as observed temperature vs. correction factor. In subsequent experiments the graph can be used to account for the correction factor of the temperature measured.
2014. Chem 2401 Organic Chemistry I Experiment Manual. P. 1-6.
Cook, N. and McDonald R.S. 2013. Organic Chemistry I&II Techniques Manual for the Organic Laboratory. P 33-37.
The CRC Handbook of Chemistry and Physics, CRC Press, Boca Raton, FL.
Review I: Chemical Compounds, Formulas, and Names
CHEM 1A Dr. Preeti Srinivasan Evergreen Valley College
Formulas Describe Compounds
• A compound is a distinct substance that is composed of atoms of two or more elements. • Describe the compound by describing the number and type of each atom in the simplest unit of the compound.
– molecules or ions
• Each element is represented by its letter symbol. • The number of atoms of each element is written to the right of the element…
titrations in part II and III. Once we determine that, we use it with the sets of titrations with NaOH. Both Marisa and I will equally do work for both parts I, II, and III.
Part I - Acid-Base Titrations with Chemical Indicators
We obtained a 24 chem well-plate, 40 mL of HCl, and 100 mL of NaOH.
We cleaned out a buret with the base, NaOH.
We then obtained three different indicators: Boomcreiol green, Methyl orange, and 1% Phenolphthalein.
Using the well-plate we sorted the indicators into 3…
THE MOLAR VOLUME OF HYDROGEN:
THE REACTION OF MAGNESIUM WITH HYDROCHLORIC ACID
• The molar volume of hydrogen gas will be determined by experimentally measuring the
of hydrogen evolved during the reaction of magnesium with hydrochloric acid.
• The universal gas constant will be measured and class data will be combined for statistical data
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
Laws and concepts…
CHEM 142- Lab Report
Introduction to Measurement
The materials used for this lab was a large beaker and a (250 mL) beaker, Erlenmyer flask (25 mL), pipet, ice, thermometer, ring stand, bunsen burner, and a thermometer clamp.
A beaker (250 mL) was filled completly with ice. Included was just enough water to cover the ice and then a thermometer was placed (2 cm) away from the bottom of the beaker. The temperture was recorded to the nearest .1…
electrolytes. The heat of neutralization for all reactions involving strong electrolytes will be constant and the same amount of heat will be formed (Petrucci et al., 2011).
The experimental procedure used for this experiment was outlined in the CHEM 120L lab manual, experiment #4. All steps were followed without deviation
Part A: Heat of dissolution of NaOH
Mass of calorimeter: 44.90g
Mass of NaOH used: 10.00g
Initial temperature before NaOH added: 23.5°C
Table 1: Temperature of…
February 4, 2015
Precision and Accuracy of Scientific Glassware
The objective of this experiment is to learn which scientific glassware should be used in various circumstances, how to measure volume and mass and how to record laboratory data and observations. Become familiar with significant figures, errors, precision and accuracy associated with the various tools and techniques. To Contain Glassware you will need two Erlenemeyer Flasks, one 125 mL to measure…
Chem 100 Research Project: Essay Outline
Lasers & Medicine
A. Definitions of Lasers and Medicine
1. Laser is a device that emits light through a process of optical amplification
based on the stimulated emission of electromagnetic radiation.
2. Medicine is the applied science or practice of the diagnosis, treatment, and
prevention of disease.
B. How they relate?
1. Cure diseases, surgeries, etc.
WE DID IT
FINAL WAS COMPLETED
Chem Final Review
Intro to chemistry
○ Dimensional analysis (5)
○ Measurements (3)
○ Accuracy and Precision (4)
Matter and energy
○ Matter (2)
○ Nuclear Reactions (41)
○ Fission and Fusion (42)
■ Nuclear bombardment
■ Energy and “missing” Mass
■ Law of Conservation of Mass and Energy
■ Einstein’s Famous Equation (E=mc
■ Nuclear Chain Reactions…