Chemistry scin131 Study guides, Class notes & Summaries

Question 12 of 25 4.0 Points `I was wading in the creek and discovered what I thought to be a small meteorite. I took a small sample of it home, ran some fancy schmancy chemical tests on it, and determined it was 18.0% chromium by mass. How many grams of this meteorite would I need to be able to have 15.0 g of chromium? A.100 B.120.0 C.2.7 D.83.3 Answer Key: D Feedback: Good. See section 6.6 and 6.7 Question 13 of 25 4.0 Points `Suppose I lay before you 5.0 gram samples each of Sr, Z...

SCIN131 Week 2 Quiz Released: Jun 25, 2021 11:55 PM Your quiz has been submitted successfully. 3 / 3 points `Which of the following statements is true as stated by the chemist Joseph proust? Question options: All atoms of a given element have a constant composition and are different than atoms of any other element. The nucleus is a dense region of positive charge that always contains protons and neutrons. Matter cannot be either created or destroyed in a chemical reaction. Hide Fe...

CHEMISTRY SCIN 131 Week 4 Quizess (Questions with Correct Solutions) Nicotine (C10H14N2), a member of the nightshade family of plants, is an oily liquid that makes up between 0.6 to 3% of a cigarette's mass. Contact with the liquid pure form can cause death within hours, as nicotine passes through the dermis and heads directly for the bloodstream. Overdoses and death can easily occur in those smoking cigarettes with nicotine patches applied on their body. How many nicotine molecules are i...

CHEMISTRY SCIN 131 Week 4 Quizess | Questions with Correct Solutions. Eureka! I've discovered a new compound! Yay for me. I have determined that its empirical formula, but in order to determine its actual molecular formula, I need to know which of the following? • A. the number of moles of the compound in a 1.00 g sample of the substance • B. the density of the compound • C. the boiling point and freezing point of the compound • D. the molar mass of the compound. • E. non...

SCIN131 Quizess Week 4 (Questions with Correct Answers) Latest Graded. The empirical formula of an organic molecule is CH; its molar mass is 104.1 g/mol. What is the molecular formula of the molecule? • A. C10H12 • B. C6H6 • C. None of these. • D. C2H4 • E. C8H8 Feedback:Great! Empirical Formula discussed in Chapter 6.2. Question 6 of 25 4.0/ 4.0 Points Salicyclic acid (C7H6O3) is commonly the active ingredient in face washes designed to help with acne. What is th...

Your quiz has been submitted successfully. 3 / 3 points `Which of the following statements is true as stated by the chemist Joseph proust? Question options: All atoms of a given element have a constant composition and are different than atoms of any other element. All samples of a given compound have the same proportions of their constituent elements. The nucleus is a dense region of positive charge that always contains protons and neutrons. Matter cannot be either created or destroyed in...

SCIN131 Week 2 Quiz, Complete questions and Answers summer 2021 / SCIN131 Week 2 Quiz, Complete questions and Answers summer 2021

SCIN131 Week 1 Quiz. Released: Jun 18, 2021 11:55 PM Your quiz has been submitted successfully. 3 / 3 points Which of the following is an observation? Question options: The universe began as a cosmic explosion called the Big Bang. Matter is made of atoms. A body in motion stays in motion unless acted upon by force. Hide Feedback Great! This topic is discussed in Chapter 1 in the text. This is the scientific method. 3 / 3 points I have decided to jump o...

SCIN 131 Week 1 Quiz / SCIN131 Week 1 Quiz: American Military University | Score: 85 / 100 (85%) | Latest 2021SCIN131 Week 1 Quiz. Released: Jun 18, 2021 11:55 PM Your quiz has been submitted successfully. 3 / 3 points Which of the following is an observation? Question options: The universe began as a cosmic explosion called the Big Bang. Matter is made of atoms. A body in motion stays in motion unless acted upon by force. Hide Feedback Great! This topic is discussed in Chapter 1 in the text. Th...