163_PS1_PartA_S24_1019

Simplify. Write each answer in scie 17) (5.4x 10")는 (7X/0") 19) (6 x 10°(4 x 10-1) 21) (7.68 x 10:)는 (9x/0°)

Please answer questions 4a, 4b, and 4c. The questions are provided in the attached image. Thank you.

Can someone answer nos. 5 to 10? Thank you very much! If it's not too much, provide an explanation for each number. Thanks!

(a) Is it true that 26.3 mpg gasoline translates to 319 g CO:/mi? i. Convert mpg (miles per gallon) to miles per kg (of gasoline) using the density of gasoline ii. Convert kg of gasoline to kg of C assuming the overall formula for gasoline is CıH1a5 ii. Convert kg of C to kg of CO2 iv. Now finally compute g CO:/mi corresponding to 26.3 mpg and compare to 319 g CO2/mi

hi ! can you provide a step-by-step solution with explanation for this problem ? i really want to work on chemistry since i'm having a hard time answering questions. thank you <3

Need help solving questions 4a, 4b, and 4c? Thanks!

Number 6, I've been struggling with these types of problems all year trying different tutors and going to the professor trying to have them explain how to go about it. How would I even start to set the problem up?

pls help! (all 3 are part of the same question) thank you so much!

Quiz # 2 Due 16 Mar at 14:30 Points 10 Questions 5 Available until 16 Mar at 14:30 Time limit 20 Minutes Instructions الكويز عبارة عن حل شيت والمعطيات لكافة الأفرع 25 ml of 1M HCI (ag) at 23.4°C was added to 25 ml of 1M NaOH at 23.4°C. The final temperature of the reaction mixture was 29.7 C. Calculate A H, (KJ/mol). Density of each solution is 1.04 g/ml and Specific heat of water =4.184 J/g.C This quiz was locked 16 Mar at 14:30. * Previous 1O

So I went throught the material to re learn this question we had in class but I still don't get it. Maybe I don't understand my professors style of teaching as much. Can someone help me answer these questions and undertand them. Thank you

professor Scimemi has accepted you as a Master’s student and you are involved in a project that studies the cellular basis of neuropsychiatric diseases. For your electrophysiology recordings you have to make a recording solution containing (in mM): 119 NaCl, 2.5 KCl, 2.5 CaCl2, 1 MgCl2, 26.2 NaHCO3, 1 NaH2PO4, 22 glucose. You need 800 ml of it. How much KCl do you need to weigh out? Hint: we only care about KCl here. (MW KCl is 74.55 g/mol

For items 7-8 choose the letter of the best answer. No need to write the explanations.

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

Answer questions 1 and 2 according to the data given. Dater Weight of cream i: 326 kỳ. Table shows some data obtained directly from Lactascan instrument. Fat % SNF % Lacto- density 27.32 30.23 Raw milk 4.15 7.97 Skim milk 0.08 8.26 Q1. Calculate fat percent of creamn A) 46 B) 28 (C) 3D D) 0.046 آدرما 396 100 x Q2. Calculate efficiency of the cream separator. A) 100% B98% C) 97% D) 96% E) 87.2% amount 2500 L E) 0.28

Please help me how to solve this problem in detail so i can understand it. Thank you very much.

S Window Help E 100% Tue Apr 20 14:34 Ayemoba ldowu Emmanuel Q A moodle.ciu.edu.tr CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30 (page 1 of 15) • Emmanuel Ayemoba 0-2021 EXAMS I CHEM 110 - SPRING 2020-2021 MIDTERM EXAM 20/04/2021 - 14:30-15:30 1 A compound contain 5.9265% hydrogen and 94.0735% oxygen has a molar mass 34.01468g/mole. Determine empirical and molecular formula of this compound. put of Select one: O a. HO, H20 O b. None of them O c. H,0, HO O d. H202, HO O e. HO, H202 Next page 1 CHEM 110-SPRING 2020-2021 QUIZ 1 Jump to... week 1 (03.03.21, wednesday, 08.30) 10/4/2021 - 17:30-18:00 Introduction ► 20 tv МacBook Air

Hi! I am having trouble with these questions and really need assistance on them, thank you so much!

STARTING AMOUNT esc C X C 2 F2 W # 3 1000 F3 ADD FACTOR x( ) $ 4 1 97.9 FS de in % 5 2 Convert 23.4 kJ to calories 2.34 x 104 t 4184 kcal 6 P 0.001 J 4.184 COMEC DOLL ANSWER & 7 9.79 × 104 cal 00 8 RESET FO 2 23.4 ( 5590 A FIT 120 Jan 21 del +

4..In your words and in a few sentences, explain what the embodied energy is and how solution processing fits in with the sustainability thematic.

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL 2.205 lbs = 1 kg You may assume…

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 8 fluid ounce glass of the beverage you used in this lab. Assume that the concentration of Allura Red in the beverage is 0.000054 M. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL Do not include units with your answer.

Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 9 fluid ounce glass of the beverage you used in this lab and use this calculation to determine the number of such glasses of Allura Red sports drink required to reach the LD50 of 10,000 mg of Allura Red/kg body weight. Assume that the concentration of Allura Red in the beverage is 0.000038 M and the person has a body weight of 175 lbs. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL 2.205 lbs = 1 kg You may assume…

Why do you need to study chemistry? How is it applicable to your course which is Criminology? In ten (10) sentences.

5) hw help!!

Explain your rationale for using the summative assessment (below) from the lesson plan on mixing substances in a 5th-grade classroom based on the below standard and learning objective, including how it aligns with the learning objective.  Summative Assessment  Summative: Components of the Lab Report Purpose: The student should clearly state the purpose of the experiment, which is to determine whether the mixing of two or more substances results in new substances. Procedure: The student should describe the steps they took to conduct the experiment. This includes the substances they chose to mix and the safety equipment they used. Observations: The student should record any observable changes that occurred when the substances were mixed. This could include a color change, the formation of a precipitate, or a change in temperature. Conclusion: The student should state whether a new substance was formed based on their observations. They should also reflect on their accuracy in…

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I am still working through understanding this, the full steps to compare to what I already have written down I need to see how much I really did correctly! Please help!

I need answers for # 2-9 on this worksheet