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Part A Which route would be better: one that produces a small amount of hazardous waste or one that produces a large amount of nonhazardous waste? Which green chemistry metric accounts for this dilemma? Match the items in the left column to the appropriate blanks in the sentences on the right. Reset Help minimize The best route is because it should the E-factor and maximize the effective mass yield. the one that produces a small The accounts for this dilemma as it looks at the amount of relative to amount of hazardous waste the amount of E-factor product made the one that produces a large amount nonhazardous waste materials used difficult to choose hazardous reagents used waste produced Submit Previous Answers Request Answer

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

Consider Molecule X, which is found in all living cells. This single-strand nucleic acid folds into a compact shape and forms a large complex with about 80 proteins. This complex is responsible for synthesizing new proteins in a living cell. What is the name of X? Your answer should be one word, or a short two- or three-word phrase. Spelling counts. Note: if there is more than one possible answer, separate each answer with a comma. ☐ ×

On determining temperature and COz concentration that occurred thousands of years ago: (12 pts) Someone shows you the plot below associating isotopes ratios to temperature records and you immediately say these samples are from polar ice cores. Why?   (10 pts) How would you expect the plot might change if instead the isotopes were obtained from ocean sediments? Draw that version of the plot and explain. (8 pts) Temperature records based on sediments often go back millions of years to the age of dinosaurs, while the ones based on ice-cores go back less than 1 million years. What's the main cause of this?

Has 2 subtleparts ( A&B) . not graded everything is given

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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…

QUESTION 4 From the Coursebook: What is a useful marker point for the Global Anthropocene? When glacial sediments are replaced by organic sediments When Carbon Dioxide (CO2) and Methane (CH4) first get recorded in rocks and sediment When Carbon Dioxide (CO2) and Methane (CH4) first appeared in the atmosphere Excess of radioactive isotopes such as 14C and 239Pu in rocks and sediments

A book like in the picture below contains writings and pictures made byblack or colored ink. The paper itself and the ink are made from different minerals.Can you name some minerals that are used to complete this book? Write and justify your answers.

Determining Diet. One method for determining the amount of corn in early Native American diets is the stable isotope ratio analysis (SIRA) technique. As corn photosynthesizes, it concentrates the isotope carbon-13, whereas most other plants concentrate carbon-12. Overreliance on corn consumption can then be correlated with certain diseases, because corn lacks the essential amino acid lysine. Archaeologists use a mass spectrometer to separate the 12C and 13C isotopes in samples of human remains. Suppose you use a velocity selector to obtain singly ionized (missing one electron) atoms of speed 8.50 km /s, and you want to bend them within a uniform magnetic field in a semicircle of diameter 25.0 cm for the 12C. The measured masses of these isotopes are 1.99 * 10-26 kg (12C) and 2.16 * 10-26 kg (13C). (a) What strength of magnetic field is required? (b) What is the diameter of the 13C semicircle? (c) What is the separation of the 12C and 13C ions at the detector at the end of the…

A sample of iron weighing 15.0 g was heated with potassium chlorate (KCIO3) in an evacuated container. The oxygen generated from the decomposition of KCIO3 converted some of the Fe to Fe2Oe. If the combined mass of Fe and Fe203 was 17.9 g, calculate the mass of Fe203 formed and the mass of KCIO3 decomposed. Please show your work for credit and comment on another students such as asking a question or pointing the student in the right direction.

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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]  .

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)

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

AME M Inbox (1,600)-fantil@udeledu X Mail- Francesca A Tantillo-Out x Homepage - CHM150-251 Chen X + → Capp.101edu.co < A Z 89'1 Rain coming 2 S # 3 E D C Uranium hexafluoride, UF, is an important compound used in the enrichment of uranium by gaseous diffusion. $ Which of the following best describes where fluorine can be found on the periodic table? 4 40 R % F 5 B) Noble gases A) Alkaline earth metals C) Lanthanides D) Actinides E) Halogens G O Question 19.b of 23 6 B Aktiv Chemistry OME V Y H * الات & 7 -0✓ INN N PrtScn * 8 J Home End o M ( O 9 K O ) 0 L Alt Pgup m P Pon 12 B ? □ ( 4D Update ***/***/// 512 PM D 7/6/2022 < X Submit Del Backspace Enter Shift

Discuss the contribution of Amadeo Avogadro to the quantitative aspect of Chemistry.

Pick a source of (SO2) emissions and describe two ways (SO2) emissions from that source can be controlled.

口 A docs.google.com Classroom | Google for Education Alchemy Lesson 20 & 21 Worksheet Andres Carrill Andres Carrillo - Alchemy Lessons 20 & 21 Worksheet Update Apple ID S Some account servi available until you sig File Edit View Insert Format Tools Add-ons Help Last edit was 2 days ago 100% Normal text Arial 11 BIUA E = E = EE E - E E X 1 2 3 4 .. 6 I 7 O 8 1 IC 5 AIV-20: Getting Connected (Writing lonic Compounds) Part 1: Putting together lonic Compounds lonic compound Metal Number of cation nonmetal number of anion total total charge = 0 valence valence number of electrons electrons valence electrons NaF, sodium fluoride Na Na + (+1)+(-1) = 0 F- 8. MgO, magnesium oxide Mg 02- (+2) + (-2) = 0 MgCl2, magnesium chloride Mg CI 7 16 (+2) + 2(-1) = 0 Ne, neon Ne 8 BeF2, beryllium fluoride Be MgS, magnesium sulfide CaCl,, calcium chloride Na Br K Se Al Al203, aluminum oxide Al Al F