Barrons SAT Subject Test Chemistry, 13th Edition

Introduction to Chemistry 1 These skills are usually tested on the SAT Subject Test in Chemistry. You should be able to... Disti ...

An example of how density varies can be shown by the difference in the volumes occupied by 1 gram of a metal, such as gold, and ...

atom relationship. Mixtures, however, can vary in their composition. TIP Know how to separate mixtures by using their properties ...

when no change is occurring in the type of structure that makes up its smallest component. Some common examples are physical sta ...

Figure 1. An Exothermic Reaction Figure 2. An Endothermic Reaction TIP Know how to read these graphic representations. Conservat ...

all physical and chemical changes have energy considerations associated with them. To understand how and why these changes happe ...

Types of Reactions (Exothermic Versus Endothermic) When physical or chemical changes occur, energy changes are involved. Change ...

the reaction is exothermic and the ΔH is negative. Therefore, the system’s surroundings must gain the energy that the system los ...

MEASUREMENTS AND CALCULATIONS The student of chemistry must be able to make good observations. Observations are either qualitati ...

There are seven basic units that can be used to express the fundamental properties of measurement. These are called the SI base ...

For an example of how a prefix works in conjunction with the base word, consider the term kilometer. The prefix kilo- means “mul ...

A unit of length, used especially in expressing the length of light waves, is the nanometer, abbreviated as nm and equal to 10−9 ...

1,000 cm^3 of water weighs 1,000 g @ 4°C. Therefore 1 L of water @ 4°C weighs 1 kg, and 1 mL of water @ 4°C weighs 1 g. Temperat ...

REMEMBER The Kelvin unit is designated with K and does not have the “°” symbol. Note: In Kelvin notation, the degree sign is omi ...

equals 1,000 calories. It is the quantity of heat that will increase the temperature of 1 kilogram of water by 1 degree on the C ...

of the exponents gives 10−7. Now, changing to a number with only one digit to the left of the decimal point gives you 1.15 × 10− ...

the preceding fraction. The answer is in milligrams because this is the only unit remaining and it assures you that the correct ...

subdivisions, we see that it is between the fourth and fifth. This means that the volume lies between 34 and 35 milliliters. The ...

Final zeros to the right of the decimal point are significant. 6.00 mL 3 2.350 mL 4 In numbers smaller than 1, zeros to the left ...

Problem Unrounded answer Answer rounded to the correct number of significant figures 4.29 cm × 3.24 cm = 13.8996 cm^2 = 13.9 cm^ ...