And molar mass - Study guides, Class notes & Summaries

Activity: Moles, Avogadro, and Molar Mass

Activity: Moles, Avogadro, and Molar Mass questions and answers latest 2023 - 2024 [100% correct answers]

Chapter 7 Moles and Molar Mass exam with 100% Correct answers already graded A+.

Avogadro's Number The number of atoms in 12.01 grams of Carbon Numerical Value of Avogadro's Number 6.02 × 10²³ parts Parts= Representative Particles 1) Atoms 2) Ions 3) Formula Units 4) Molecules Mole The SI unit of measure for an amount of a chemical substance Molar Mass The mass in grams of one mole of a substance What is the molar mass of Mg(NO₃)₂? 148.33g/mol What is the mass of 1.33 moles of Titanium, Ti? 63.7gTi What are ...

RNAS C Practice Test Review 437 Questions with Verified Answers A capacitor and resisitor in parallel - CORRECT ANSWER will have same voltage across since in parallel. if in series, voltage drops would occur they can be treated together If the absolute pressure of a gas is increased from 3 atm to 4 atm at constant volume, then the absolute temperature of the gas will increase by: A. 25%. B. 33%. C. 67%. D. 75% - CORRECT ANSWER B. Assuming the validity of the Ideal-Gas law, PV = n...

The standard reduction potential for the half-reaction HClO(aq) + H+(aq) + e- → ½Cl2(g) + H2O(l) is 1.61 V. What is the standard reduction potential for the following half-reaction? 2HClO(aq) + 2H+(aq) + 2e- → Cl2(g) + 2H2O(l) - Ans: 1.61 V Given that Eºcell = 0.60 V for a voltaic cell in which the following redox reaction takes place 2Rh(s) + 3Cl2(g) → 2Rh3+(aq) + 6Cl-(aq) and that the standard reduction potential for the half-reaction Cl2(g) + 2e- → 2Cl-(aq) is 1.36 V, calcul...

What is the total concentration of ions (in mol/L) in a solution obtained by dissolving 3.51 g of Cr(NO3)3 in enough water to make 351 mL of solution? (Molar mass of Cr(NO3)3: 238.01 g/mol) - Ans: 0.168 +/- 1% What is the concentration of sodium ions (in mol/L) in a solution obtained by mixing 90.5 mL of 0.181 M solution of Na2SO4 and 65.5 mL of 0.147 M solution of Na3PO4? Assume that volumes are additive. - Ans: 0.395 Which of the following molecules is polar? - Ans: IF5 What is the ...

CHEM 280 MIDTERM EXAM AND CHEM 280 FINAL EXAM PRACTICE TESTS WITH 300 REAL EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS (EXPERT VERIFIED SOLUTIONS TO ALL CALC PROBLEMS AND FORMULAS SHOWN) 1. Molarity = Moles / Volume 2. Moles = Mass / Molar Mass Moles 9 is also 9 x 10^-3 Milli Moles 3. pH = -log x Cation 4. H3O x OH = 1 x 10^-14 5. Total Mass = Solute + Solvent 6. Mass Percent = Solvent Mass / Total Mass x 100 7. Total Pressure - Partial Pressures = Remaining Pressure 8. P1 ...

FINAL EXAM CHM 151 RIO SOLADO M.SCHAAB LATEST UPDATE GRADED A+ What is the difference between an ionic bond and a covalent bond? An ionic bond is formed when one atom transfers electrons to another atom, creating ions that attract each other. A covalent bond is formed when two atoms share electrons. How do you determine the number of valence electrons in an element? The number of valence electrons can be determined by looking at the group number of the element in the periodic t...

Stoichiometry Correct Answer The study of quantities of materials consumed and produced in chemical reactions What is the formula weight? Correct Answer Average atomic weights in amu. It is the weight of 1 formula unit What is the molecular weight? Correct Answer Average atomic weights in amu. It is the weight of 1 molecular unit Percent Composition Correct Answer Relative amount of an element in a compound/molecule What is 1 mol of particles equivalent to? Correct Answer 6.02x10^23 ...