Module 2 SDS (safety and data sheets)

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…

2 What is reservior in environmental chemistry? What are O1D (O singlet D) and O3P( O priplet P)? Not sure if it's written in this way.

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

FILL IN THE BLANK 1. _______ means the inactivation of disease-causing organism. Here, the wastewater following secondary treatment is usually treated in one of two ways: chlorination or ultraviolet radiation. 2. ______is found in some natural waters, particularly in areas where these ore deposits have been mined. It's recommended limit is 5.0 mg/L

You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 34.9 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?   -don't prematureley round

(a) The population of a large city grows very quickly for several years. Then the growth begins to slow, and the population remains constant for several years. After this, the population grows again, but slower than before. Population Population Population Population Time Time Time Time

SS C cm 1 GtG tC FCX in SH U njmpLGQQmzAe4FI77iAeY/edit#slide%-id.g112e600b836_0_44 个 Help Accessibility Last edit was 2 hours ago Arial 21 BIUA work Day 1- 18 What were some potential human errors that could have occurred when calculating the mass before and after the reaction? Add these to your drawing on page 60.

How does the 1966 Fahrenheit 451 move portrayed censorship? Provide details and examples

Cuántos hidrógenos alfa tiene el siguiente compuesto? A 9 B 12 © C) 4 D 8 E 3 0

Choose the correct option for each question below In case of chemical burns in the laboratory, you should not do one of the following:  1) Cover with dry, clean or sterile material.  2) Rinse the area with large quantities of water.  3) Apply burn ointments or sprays to affected areas.  4) Call emergency services if large areas of victim’s body are affected.

What Do you think the old stuff and the new stuff on the chemical reaction it makes a sparker light up

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

The LD50 of a substance is the concentration at which a substance will kill half of a test specimen. What doesLD50 stand for? * O Low Dose 50 O Limit Dosage 50 O Lethal Dose 50 O Legal Dosage 50

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

Which of the following questions would not be of scientific importance? Note: there is more than one correct answer here. a. Does fracking affect the frequency of severe earthquakes? b. What was the best album of 2022? C. What were the radiation levels of the Three Mile Island meltdown? d. Who is the fastest-The Flash, Quicksilver or Sonic the Hedgehog? e. Is there a possible vaccine for RSV?

PLEASE DO HELP ME.. NO NEED FOR EXPLANATION...THIS IS JUST A PRACTICE EXERCISE FOR OUR UPCOMING ORAL AND THESE ARE THE SAMPLE QUESTIONS..PLEASE ANSWER SHORTER.. I WILL GIVE HELPFUL RATING AFTER

Part B Consider the reaction C12H22O11(s)+12O2(g)→12CO2(g)+11H2O(l)C12H22O11(s)+12O2(g)→12CO2(g)+11H2O(l) in which 10.0 gg of sucrose, C12H22O11C12H22O11, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/∘CkJ/∘C. The temperature increase inside the calorimeter was found to be 22.0 ∘C∘C. Calculate the change in internal energy, ΔEΔEDelta E, for this reaction per mole of sucrose. Express the change in internal energy in kilojoules per mole to three significant figures.

Read the buret

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?

There are 2 boxes for each reactant and product. Type the coefficient in the first box and the chemical formula in the second. Enter the chemical formulas in the order they appear in the problem. Each box must have a coefficient or formula. Type in a "1" if you did not change the coefficient. Type the formula in this format: CO_2. Omit the subscript "1" in the chemical formulas. This is case-sensitive. Carbon monoxide reacts with iron(III) oxide to produce iron and carbon dioxide.

Hydrochloric acid can be prepared by the following reaction: 2NACI(s) + H2SO4(aq)2HCI(g) + Na2SO4(s) What mass of HCI can be prepared from 2.00 mol H SO4 and 150. g NaCl? Multiple Choice 2.57 g 167 g 93.6 g 11 asus COLLECTION prt sc delete 112/A insert f7 f8 f11