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Chapter 3: Q. 3.72 (page 92)

Classify each of the following as an element, a compound, or a mixture; 3.1

a. neon gas in lights

b. a salad dressing of on and vinegar

c. sodium hypochlorite (NaCIO) in bleach

Short Answer

Expert verified
There is one sort of atom in an isotope. A compound is comprised of two or more unique atoms that are linked together. A mixture is made up of two or more separate components that are only bonded structurally, not biologically.

Step by step solution

01

Given information (a)

The isotope halogen is a whitish, inert gas under ideal circumstances. Noon is an item since it is comprised of a ground electronic state. It is a wholly odourless gas, which means it will not form partnerships with other ions or things.

02

Explanation (a)

(a) Neon gas in lights is a pure substance. It consists of only one type of material i.e., neon. Hence, it is an element.

03

Given information (b)

The parts are agitated together, but not covalently combined in the cocktail. Salad is a beautiful illustration of a combo. Tomatoes, lettuce, cucumbers and ranch dressing are all in one plate.

04

Explanation (b)

(b) A salad dressing of oil and vinegar is a mixture because it consists of different compounds which are chemically not combined.

05

Given information (c)

If we're talking about sheer disinfectant white, the answer is obvious; disinfectant is a combination. After all, pure deionized water is made up of interconnected elements. There is no need for overhead or compound terms.

06

Explanation (c)

(c) Sodium hypochlorite in bleach is a compound with chemical formula, (NaCIO). It is a pure substance with fixed chemical composition. Hence, it is a compound.

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Most popular questions from this chapter

Calculate each of the following temperatures in kelvins and degrees Fahrenheit: (3.3)

a. The highest recorded temperature in the world was 58.0C鈭�in El Azizia, Libya, on September 13, 1922.

b. The lowest recorded temperature in the world was-89.2C鈭�in Vostok, Antarctica, on July 21, 1983.

Calculate each of the following temperatures in degrees Celsius and kelvins: (3.3)

a. The highest recorded temperature in the continental United States was 134掳Fin Death Valley, California, on July 10, 1913

b. The lowest recorded temperature in the continental United States was -69.7掳Fin Rodgers Pass, Montana, on January 20,1954

Indicate whether each of the following describes a gas, a liquid, or a solid:

a. Lemonade has a definite volume but takes the shape of its container.

b. The particles in a tank of oxygen are very far apart.

c. Helium occupies the entire volume of a balloon.

If the same amount of heat is supplied to samples of10.0geach of aluminum, iron, and copper all at15.0掳C. which sample would reach the highest temperature (see Table 3.11)?

Use the heat equation to calculate the energy for each of the following (see Table 3.11 ):

a. calories to heat 8.5g of water from 15鈭�Cto36鈭�C

b. joules lost when 25g of water cools from 86鈭�Cto61鈭�C

c. kilocalories to heat 150g of water from 15鈭�Cto77鈭�C

d. kilojoules to heat 175 g of copper from28鈭�Cto188鈭�C
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