A 1 Amount of substance 1.1 Which mass corresponds to 6 × 1023 u (without calculation)? 1.2 What is the mass of the following amounts of substances: a) 1 mol N2, b) 0,5 mol O2, c) 1 mol C2H6O, d) 10 mol U-238? 1.3 Compute the mass of a H atom (in kg). How much heavier is a He atom (or U-238 atom)? 1.4 Compute, how many pairs of NaCl are contained in a package of salt (500 g). 1.5 What is the mass of the air in the room? (make proper assumptions. A mole of gas fills 22.4 l.) 1.6 How heavy mB is the content of a bottle of wine? (assume: VB 0.75 l, alcohol concentration c = 14% vol with QA = 0.79 gw and the rest water.) What is the blood alcohol concentration (appro- ximately) after drinking the bottle? Compare with a bottle of schnaps (also 0.75 l, but c = 41% vol). 1.7 Determine the volume, that is filled by a molecule of water. Compare with the amount, that is filled by a gas molecule (under normal conditions).

A 1 Amount of substance 1.1 Which mass corresponds to 6 × 1023 u (without calculation)? 1.2 What is the mass of the following amounts of substances: a) 1 mol N2, b) 0,5 mol O2, c) 1 mol C2H6O, d) 10 mol U-238? 1.3 Compute the mass of a H atom (in kg). How much heavier is a He atom (or U-238 atom)? 1.4 Compute, how many pairs of NaCl are contained in a package of salt (500 g). 1.5 What is the mass of the air in the room? (make proper assumptions. A mole of gas fills 22.4 l.) 1.6 How heavy mB is the content of a bottle of wine? (assume: VB 0.75 l, alcohol concentration c = 14% vol with QA = 0.79 gw and the rest water.) What is the blood alcohol concentration (appro- ximately) after drinking the bottle? Compare with a bottle of schnaps (also 0.75 l, but c = 41% vol). 1.7 Determine the volume, that is filled by a molecule of water. Compare with the amount, that is filled by a gas molecule (under normal conditions).

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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