Molar conversions - Study guides, Class notes & Summaries

UCF-CHM2045C % comp - Answer- = (looking for)/ compound Percent Abundance - Answer- set to x and 1-x Molecular formula from empirical - Answer- Mass of molecular/ mass of empirical convert three elements - Answer- find the molar mass and divide by lowest mol Formula for conversions - Answer- Mass=(1/amu)=Mole=(Avo #/Mole)=Atom (2(compound)/Compound)=Atoms Atomic Number - Answer- Protons Mass # - Answer- Protons and neutrons Isotopes are what? - Answer- different neutrons...

CHEM 103 MODULE 1 EXAM 2023/2024 MODULE 1 EXAM Question 1 Click this link to access the Periodic Table. This may be helpful throughout the exam. 1. Convert 845.3 to exponential form and explain your answer. 2. Convert 3.21 x 10-5 to ordinary form and explain your answer. 1. Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places = 8.453 x 102 2. Convert 3.21 x 10-5 = negative exponent = smaller than 1, move decimal 5 places = 0.0000321 Question 2 Click this link to...

Balancing Chemical Equations WEEK 3 1. Sodium bromide reacts with calcium chloride to form sodium chloride and calcium bromide. Which of these chemical reactions represents the balanced reaction? a. NaBr + CaCl2 → NaCl + CaBr2 b. 2 NaBr + CaCl2 → 2 NaCl + CaBr2 c. NaBr + 2 CaCl2 → NaCl + 2 CaBr2 d. NaBr + CaCl → NaCl + CaBr Balanced chemical equations have the same number of each atom on each side of the arrow. This equation is correct: 2 NaBr + CaCl2 2 → NaCl + CaBr2 2. The...

Detailed notes on Unit 5 - Formulae, Equations and Amounts of Substance covering all the specification points. This allowed me to achieve an A* in chemistry. Covers formulae, definitions, empirical formula, calculations of molar mass, ionic compounds and equations, chemical equations and balancing, mole calculations, conversions, gas calculations, mass to mass calculations, mass to volume calculations, Avogadro's calculations, percentage yield calculations, atom economy, stoichiometry, limiting ...

TEST BANK accompanying the book thermodynamics - fundamentals and engineering applications P. Colonna Delft University of Technology, The Netherlands     PREFACE 4 SAMPLE EXAM 1 5 Exercise 1 (true/false questions) 5 Exercise 2 5 Exercise 3 6 Exercise 4 6 Exercise 5 6 Exercise 6 7 SAMPLE EXAM 2 8 Exercise 1 (true/false questions, with justification) 8 Exercise 2 8 Exercise 3 9 Exercise 4 9 Exercise 5 10 Exercise 6 11 SAMPLE EXAM 3 12 Exercise 1 (true/false questi...

CHEM 103 Exam 1-6 EXAM 1 1. Convert 1005.3 to exponential form and explain your answer. 2. Convert 4.87 x 10-6 to ordinary form and explain your answer. 2. Using the following information, do the conversions shown below, showing all work: 3. Do the conversions shown below, showing all work: 4. Be sure to show the correct number of significant figures in each calculation. 4. 1. 1.35601 contains ? significant figures. 2. 0.151 contains ? significant figures. 3. 1.35601 + 0.151 = ? (give an...

Student Exploration: Moles Vocabulary: atomic mass, Avogadro constant, conversion factor, dimensional analysis, mole, molar mass, molecular mass, scientific notation, significant figures, unified atomic mass unit Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. In the image to the right, note a dozen eggs, a dozen donuts and a dozen roses. How many of each item do you have? 12 2. Would a dozen of each object have the same mass? no 3. Suppose you have a dozen carbon atoms, a...

A "dry lab" that demonstrates basic techniques used to perform weight measurements, mass-mole-particle conversions, and percent composition

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HESI A2 CHEMISTRY STUDY GUIDE QUESTIONS AND ANSWER KEY Atom The atom is the smallest unit of matter. Every atom contains one nucleus at least one electron. The nucleus contains at least one positively charged proton and an equal number of neutrally charged neutrons. Every atom also has at least one negatively charged electron bound to the nucleus. When the number of protons (the atomic number) is equal to the number of electrons, the atom is neutral. When the number of protons and number of ...