By Kenneth W. Whitten, Raymond E. Davis, Larry Peck, George G. Stanley
The Qualitative research chapters at the moment are to be had in a convenient paperback complement, excellent for bundling with the middle textual content, CHEMISTRY, 8th version, or to be used as a standalone merchandise.
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One atmosphere of pressure is the average atmospheric pressure at sea level. Figure 1-8 Physical changes that occur among the three states of matter. Sublimation is the conversion of a solid directly to a gas without passing through the liquid state; the reverse of that process is called deposition. The changes shown in blue are endothermic (absorb heat); those shown in red are exothermic (release heat). Water is a substance that is familiar to us in all three physical states. The molecules are close together in the solid and the liquid but far apart in the gas.
Other marine organisms can concentrate copper and zinc by a factor of about 1 million. If these animals could be cultivated in large quantities without endangering the ocean ecosystem, they could become a valuable source of trace metals. In addition to dissolved materials, sea water holds a great store of suspended particulate matter that ﬂoats through the water. Some 15% of the manganese in sea water is present in particulate form, as are appreciable amounts of lead and iron. Similarly, most of the gold in sea water is thought to adhere to the surfaces of clay minerals in suspension.
All bodies consist of matter. Our senses of sight and touch usually tell us that an object occupies space. In the case of colorless, odorless, tasteless gases (such as air), our senses may fail us. Energy is deﬁned as the capacity to do work or to transfer heat. We are familiar with many forms of energy, including mechanical energy, light energy, electrical energy, and heat energy. Light energy from the sun is used by plants as they grow, electrical energy allows us to light a room by ﬂicking a switch, and heat energy cooks our food and warms our homes.
Chemistry (with CengageNOW Printed Access Card) by Kenneth W. Whitten, Raymond E. Davis, Larry Peck, George G. Stanley