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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States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Question
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f. Is the density of the solution an intensive property or an extensive property?
8. Create a concept map that illustrates the relationship between scientific notation and unit prefixes.
9. A balloon is filled with helium at a temperature of 25.0°C.
a. Calculate the temperature of the helium in degrees Fahrenheit.
b. Calculate the temperature of the helium on the Kelvin scale.
c. Gas density decreases with increasing temperature. What would you observe if you heated the balloon?
d. Gas density increases with decreasing temperature. What would you observe if you cooled the balloon?
e. Is helium a pure substance or a mixture?
f. Is helium an element or a compound?
10. The diameter of an aluminum atom is 250 picometers (pm) (1 pm = 10-¹2 m). How many aluminum atoms must be placed end to
end to make a "chain" of aluminum atoms 1 ft long?
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