EARTH SCIENCE-856-Study Guide

Chemically active surfaces are seen on alumina-containing zeolites. Interpret this statement.

Define each of the followings: (1) environmental science, (2) Environmental Chemistry, (3)Lithosphere, (4) Biosphere, (4) environmental biochemistry, (5) toxicological chemistry, (6) Ecology .

Briefly define the phrase “fit-for-purpose” in relation to analytical chemistry.

student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…

Explain the concept of analytical chemistry regarding soil pollution

Discuss 5 advantages and disadvantages of palm oil source of oleochemicals in Malaysia.

Which elements and properties did Mendeleev examine when he predicted the properties of eka-aluminum and eka-silicon? Be specific and methodical. This will help you with completing this lab. -20-

The atomic hydrogen exists in space at an estimated concentration of one particle per cubic meter. If the collision diameter is 2.5 ×10^(–10) meter and the temperature is 2.7 Kelvin, how many kilometers away will the next potential collision be? Express the answer in three significant figures.

The Covid-19 pandemic has many experts commenting on the science associated with the virus - origins, vaccines, monoclonal antibodies, masks, social distancing.  It is important to consider what the experts say, but to also evaluate their statements.  We will start with the scientific method.  I want you to outline the scientific method from what you have been taught in previous classes.  You can list steps, parts, process, short descriptions, whatever.  If not taught in previous classes, then you will make your best guess about it.

Timely matter!

Fill in the following blanks. As the dye concentration increases, the absorbance of the light       [linearly increases, linearly decreases, exponentially increases or exponentially decreases]. The dye concentration units are [molar (M), millimolar (mM) or grams per liter (g/L)]  . Although most people wrongly conclude that absorbance has units nm, in fact, absorbance is unitless. This is because it results from a ratio of light through a colored sample relative to light intensity through a clear (blank) sample.  The units for the slope of the graph would be       [mM, 1/mM or nm]  . Hint: the slope is the change in y values divided by the change in x values. The units for the y-intercept of the graph would be       [nm, nM or unitless]  . The value for the slope of the line that describes the absorbance data is       [6.4597 or 0.0008]  The value for the y-intercept of the line that describes the absorbance data is       [6.4597 or 0.0008]  .

TRUE OR FALSE: Volatile drugs are best protected with waxed paper. Carbon dioxide is released as a result of acid-base reaction. Vegetable parchment is a transparent waterproof paper. In cascade impaction, the particles are passed by mechanical shaking through a series of sieves. Bulk powders are dispensed in individual doses. When making powders there is a manufacturing expense in individual wrapping of powder doses Powders packed are usually not potent Granules are intended for use with potent drugs because of inherent error Bulkiness decrease with increase in particle size Low angle of repose poorly flow and has high bulk density

Bucks McGee, after being poisoned, is currently being treated in the hospital with an antidote- the chemical Fe-(CN)18. The compound is so intensely coloured that even a small amount of it makes for a black or dark blue suspension. Given that this antidote has never before been administered at the hospital, none of the doctors or nurses have experience with it. There is one very old bottle of Fe-(CN)18 pills in the medicine store-room, but the label is worn and the units are in the old, archaic British Apothecaries' system which has unusual units like drachms, scruples, grains, and mites: 453.6 grams (g) = 1 pound (Ib) = 12 ounces (3) = 96 drachms (3) = 288 scruples (3) = 5760 grains (gr) = 115200 mites (m)

In the advent of genetics and molecular data, would it disregard the morphological method of identifying organisms in constructing the phylogenetic tree of life?

Uranium-238 (U238) has three more neutrons than uranium-235 (U235). Compared to the speed of sound in a bar of U235, is the speed of sound in a bar of U238 higher, lower, or the same? There are several factors that play a role. (a) Chemically, the atoms of these two isotopes behave in essentially identical ways, since the number of protons (92) is identical and the clouds of 92 electrons are nearly identical. The interatomic distance, and the effective "stiffness" of the interatomic bond, both depend on the chemical properties of the atoms. Therefore, which of the following statements are true? O The effective stiffness of the interatomic "spring" is greater for U238 because the mass is greater. O The effective stiffness of the interatomic "spring" is the same in the two isotopes, since this "spring" is a model for the interactions of the outer electrons, which are the same for different isotopes of the same atom. O An atom with more mass in the nucleus is bigger, so the distance…

Write a paraphrase of the following passages.1. Bats are in the limelight these days because they are rumored to be the source of COVID-19, the virus that caused the coronavirus pandemic. But that is just part of their story. Bats turn out to be miraculous creatures. Their ability to age without decrepitude or cancer, as well as fight off a multitude of infections, are giving us clues about how to do the same for ourselves.

What is Donnan's theory? What is its importance in biophysical chemistry?

M Apple Google Disney ESPN Yahoo! Biomedical Careers Program ☆ CATEG WHOS r B r SLIVET H₂ (9) + F2(g) → 2HF(g) PC15 (9) → PC13 (9) + Cl₂ (9) CO₂(g) + H₂(g) → CO(g) + H₂O(g) Apple iCloud Yahoo Images Bing Google Wikipedia Facebook Twitter D2L b G 3 2H₂O2 (1) → 2H₂O(1) + O2(g) prod03-cnow-owl.cengagenow.com 2CO2(g) + 5H2(g) → C2H2 (9) + 4H₂O(g) D2L VULLI CETURT JU D2L LITUNTUT T Clear All AS > 0 AS < 0 COWLv2 |... b too close to decide SISS LinkedIn The Weather Channel Yelp TripAdvisor C M G с G C VVIML. + 88 M

An engineer is designing a new phone and is in the process of choosing the elements to make up the phone that match her vision. The elements she has available to her are nickel, silicon and iodine.  a) She envisions an outer frame that is sleek, shiny and durable. Which element should she pick for the outer frame and why? b) For the microchip of the device, she needs a material that will conduct electricity but she cannot use a metal (she worries a metal will conduct too well "shorting" the device). Which material should she chose and why?

2. In a Mars Direct mission, the astronauts would return home in an Earth Return Vehicle (ERV) fueled by     methane and oxygen produced from terrestrial hydrogen and Martian CO2     helium-3 extracted from the lunar surface     finely-ground Martian rocks accelerated by an electromagnetic mass driver     cheap, traditional kerosene fuel brought from Earth   We might go back to the Moon someday to mine the lunar surface for an energy resource called     methane     antimatter     hydrazene     helium-3

The representations 14N or 15N give more information than simply the chemical symbolN. Explain?

The life cycle of a plastic bottle After reading the text below, answer the following questions. Make sure to put it in your own words. This is the story of three plastic bottles, empty and discarded. Their journeys are about to diverge with outcomes that impact nothing less than the fate of the planet. But they weren't always this way. To understand where these bottles end up, we must first explore their origins. The heroes of our story were conceived in this oil refinery. The plastic in their bodies was formed by chemically bonding oil and gas molecules together to make monomers. In turn, these monomers were bonded into long polymer chains to make plastic in the form of millions of pellets. Those were melted at manufacturing plants and reformed in molds to create the resilient material that makes up the triplets' bodies. Machines filled the bottles with sweet bubbly liquid and they were then wrapped, shipped, bought, opened, consumed and unceremoniously discarded. And now here they…

Histology stains that are used to create microscopic images originally came from the industry. clothing cosmetics healthcare automotive food

Imagine you have the following materials: Cu wire, baking powder, table salt, and magnesium ribbon and unused nail. List down their properties as to color, texture and kind of matter. Tabulate your observation. What if you have Zn metal and yellow sulfur powder. Describe their properties. You heat these two (2) substances. What will be formed? Tabulate all your observations.

The initial step in the formation of O3 from O2 in the stratosphere is the absorption of light by 02, which causes it to split into O atoms. The balanced chemical equation for this process is 02 (g) → 2 0 (g) If AHP for O (g) is +249.17 kJ/mole, what wavelength of light, in nm, must be absorbed by 02 to make this reaction occur? Enter only the numerical portion of your answer in the space provided, to the correct number of significant figures; do not enter the units.

Introduction Home Depot's market research shows that they can sell 20-lb. bags of ammonium phosphate, a common fertilizer with the chemical formula (NH4)3PO4, for $9.99/bag. This price has been marked up 6% from the wholesale price that they pay to the manufacturer. You decide to use your knowledge of chemistry to produce your own ammonium phosphate and sell it to Home Depot at 5¢ below the wholesale price. You contact a packager, who agrees to package your product for 29¢ per bag. Ammonium phosphate is produced from ammonia (NH3) and phosphoric acid (H,PO4). Ammonia, in turn, can be produced at a 50% yield via the Haber process, using a mixture of hydrogen (H2) and nitrogen (N2) gases with an iron catalyst. Phosphoric acid is obtained from a naturally occurring mineral called fluorapatite, Cas(PO4)3F, by the following process: fluoroapatite is mixed with silica sand (SiO2) and coke (elemental carbon, C) in an electric furnace. The products are carbon monoxide (CO), tetrafluorosilane…