Ewing Sarcomas are common in the diaphysis of long tubular bones and _______.

A sacrococcygeal mass from a newborn contains mature cartilage, respiratory epithelium, intestinal glands, neural tissue, and adipose tissue without immature neuroepithelium. Which statement regarding prognosis is the MOST accurate?

A pathology report states: “Poorly differentiated adenocarcinoma with marked nuclear pleomorphism and frequent mitoses.” This information primarily reflects _______.

A biopsy demonstrates: numerous atypical mitoses, necrosis, poor differentiation, invasion into skeletal muscle, lymphovascular invasion.  Which statement is MOST accurate?

Answer the following questions Predict the products and balance the chemical equation given below (2) _____ Sr(OH)2 (aq) + _____HNO3(aq)  →   Write full and net ionic equations for this reaction (2)  Determine the molarity of strontium hydroxide if 25.0mL of its solution was titrated to the endpoint by40.0 mL of 0.119M HNO3  (2)  Submit the answers in this exam. After submitting your exam, take the pictures of your work and upload them to Exam 3 Solutions, Extra Credit, and Partial Credit assignment. Your work must reflect the answer provided here. NO CREDIT will be awarded for the answer without work or justification shown.

You mix 5 mol H₂ and 2 mol O₂. Which is limiting? (2H₂ + O₂ → 2H₂O) 

Consider the balanced equation and answer the questions below. 2C2H2 (g)  + 5O2 (g) =>4CO2 (g) +2 H2O (l)    How many moles of water will form if 12.0 moles of O2 is used? (4)  If 15.0 moles of C2H2 is used, how many grams of water will form?(4) How many molecules are in 5.50 grams of C2H2? (1) What is the molarity of a solution prepared by dissolving 2.50g of C2H2 in 925mL of the non-aqueous solution? (4) How many moles of oxygen are needed to burn 2.2022 x1024 molecules of C2H2?(1)  Which reagent is a limiting (1) and how many moles of CO2 form when 10.0 mol C2H2 react with 30.0 mol of O2?(3)  Which reagent is a limiting (2) and what is the theoretical yield in grams o CO2 (3) when 20.0 g C2H2 react with 20.0 g of O2? If  25.5 g of CO2 formed in reaction, what are the  actual (1), and percent (1) yields of CO2 Submit the answers in this exam. After submitting your exam, take the pictures of your work and upload them to Exam 3 Solutions, Extra Credit, and Partial Credit assignment. Your work must reflect the answer provided here. NO CREDIT will be awarded for the answer without work or justification shown.

Answer the following question.  Polymers are large molecules composed of simple units repeated many times. Thus, they often have relatively simple empirical formulas. Calculate the empirical formulas of the Lucite (Plexiglas); 59.9% C, 8.06% H, 32.0% O Chose your final answer here. After submitting the exam, upload the matching calculations to the Exam 3 Solutions, Extra Credit, and Partial Credit assignment. Answer – 2pts, work – 1pts

Answer the following question.  Polymers are large molecules composed of simple units repeated many times. Thus, they often have relatively simple empirical formulas. Calculate the empirical formulas of Orlon; 67.9% C, 5.70% H, 26.4% N Chose your final answer here. After submitting the exam, upload the matching calculations to the Exam 3 Solutions, Extra Credit, and Partial Credit assignment. Answer – 2pts, work – 1pts

Answer the following question.  What is the oxidation number of W in  Cs2W2O7? Chose your final answer here. After submitting the exam, upload the matching calculations to the Exam 3 Solutions, Extra Credit, and Partial Credit assignment. Answer – 1pts, work – 1pts