Chapter 1, Problem 1.2E

How do molecules of elements and molecules of compounds differ? In what ways are they similar?

Distinguish precisely and in scientific terms the differences among items in the following groups. a Macroscopic matter, microscopic matter, particulate matter b Physical change, physical property, chemical change, chemical property c Gases, liquids, solids d Element, compound e Atom, molecule f Pure substance, mixture g Homogeneous matter, heterogeneous matter h Reactant, product i Exothermic change, endothermic change j Potential energy, Kinetic energy

What do you weigh in a milligrams; b grams; c kilograms? Which of these units do you think is best for expressing a persons weight? Why?

A person can pick up a large rock that is submerged in water near the shore of a lake but may not be able to pick up the same rock from the beach. Compare the mass and the weight of the rock when in the lake and when on the beach.

Yeast converts glucose to ethanol and carbon dioxide during anaerobic fermentation as depicted in the simple chemical equation here: glucose ethanol + carbon dioxide If 200.0 g of glucose is fully converted, what will be the total mass of ethanol and carbon dioxide produced If the fermentation is carried out in an open container, would you expect the mass of the container and contents after fermentation to be less than, greater than, or the same as the mass of the container and contents before fermentation? Explain. If 97.7 g of carbon dioxide is produced, what mass of ethanol is produced

Matter in the __________ state has no shape and fills completely whatever container holds it.

Compare the volumes occupied by the same sample of matter when in the solid, liquid, and gaseous states.

How does an element differ from a compound? How are they similar?

Suggest a reason for studying matter at the particulate level, given that it is too small to see.