Taking Sides

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

+ terface/acellus_engine.htm?ClassID=1467683063 Use the data below to determine the mass ratio of iron to oxygen for compound 2. Compound 1 2 Et onal Academy of Science. All Rights Reserved. Mass Fe (grams) 15.55 20.98 [20:1 Enter the answer that belongs in the green box. Iron Ratio Cmpd 2 Mass O (grams) 4.45 9.02 Sh Enter

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.

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. ☐ ×

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…

Some greenhouse gases, such as fluorocarbons (CFCs, HFCs, PFCs, etc.), are human-made. Others, such as water, methane, and carbon dioxide, are naturally produced. Which type of greenhouse gas (human-made or natural) is more difficult to control and eliminate? Which types are easier? In three to five sentences, provide evidence for your argument.

What is calibration and why is it essential in relation to food analysis? Provide examples.

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.

1. Given that a theoretical yield for isolating Calcium Carbonate in this experiment would be 100%. From that information and based on the results you obtained in this experiment, describe your success in the recovery of calcium carbonate and suggest two possible sources of error that would have caused you to not obtain 100% yield. from my result my percent yield was 102%

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]  .

help  please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working!

Please provide the answer in Litres with 3 significant figures.

5cd_i-5c7IV_IVquz8U4U02epq7z4kBnpYZ5iA/edit & nsions Help EB Ga... estions: 1 2 11 + BIU Key Words: global warming et 3 1. Why is oxygen NOT a greenhouse gas? A 4 > DOE-E X-E greenhouse gas 6 infrared energy 3. The atmosphere on the planet Venus is almost 96 % carbon dioxide. What effect might its concentration of carbon dioxide have on the average surface temperature on Venus? is not a greenhouse gas because it is transparent to infrared light. and greenhouse gasses absorb oxygen infrared radiations. meaning it can not absorb heat. 2. Why is the effect of greenhouse gases in the atmosphere similar to the effect of glass surrounding a greenhouse? Page 3: The Structure of Greenhouse Gases Questions 4. What effect does an increase in the atmospheric carbon dioxide levels (and therefore rising temperatures) have on the amount of water vapor in the atmosphere? Why? 3 7 I 5. Both coal and natural gas can be burned to generate electricity. However, burning natural gas produces about half the…

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.

Supply the missing information in the table. (Given in Blue). Answers in scientific notation should be in this sample format >>> 1.0 x 10-14