Most Integrated Circuits Are Made from Silicon,which Can Be Obtained

question 168

Multiple Choice

Most integrated circuits are made from silicon,which can be obtained from an inexpensive starting material,SiO₂.One step in the purification of silicon is to separate it from solid impurities by forming silicon tetrachloride gas.Given the following reactions,what is the overall enthalpy change in converting 1.00 mol of silicon dioxide into pure silicon?

• A)+1972 kJ
• B)-1972 kJ
• C)-592 kJ
• D)+592 kJ
• E)-625 kJ

Recognize the role of environmental factors in influencing intelligence.

Identify the different types of studies used to assess the heritability of intelligence.

Grasp the concept of phenotype and genotype and their relevance to intelligence.

Understand the impact of poverty and socioeconomic status (SES) on intelligence.

---

Definitions:

Population Explosion

A rapid increase in the size of a population caused by such factors as a sudden decline in infant mortality or an increase in life expectancy.

Social Trend

refers to widespread changes in behavior, attitudes, or cultural norms within a society over a period of time.

Fitness Trackers

Wearable devices that monitor and record a person's physical activity, health metrics, and overall fitness level.

Population Growth

The increase in the number of individuals in a population, often measured by birth rate minus death rate, immigration, and emigration.