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Chapter 3: Q. 3.59 (page 91)

Identify each of the following as an element, a compound, or a mixture. Explain your choice. (3.1)

Short Answer

Expert verified

As a result, the combination in the water is uniform and produces a homogenous mixture. Because the elements are not evenly distributed, this is a heterogeneous mixture. As a result, the mixture is classed as homogenous.

Step by step solution

01

Lemon-flavored water.

Mixtures are made up of two or more substances that are not present in the same proportion as each other but can be physically separated from each other. Homogeneous and heterogeneous mixtures are the two types of mixtures. Homogeneous mixtures are uniform throughout nature, but heterogeneous mixtures are not.

(a) Lemon-flavored water: Lemon-flavored water comprises lemon juice, salt, and sugar, all of which are completely dissolved in the water, resulting in a uniform and homogenous composition.

02

Stuffed mushroom.

(b) Stuffed mushroom - The filled mushroom meal has a variety of things in addition to mushrooms, but the elements are not evenly distributed, making it a hetrerogeneous mixture.

03

Eye drops.

(c) Eye drops - The eye drops contain active medications as well as additional solutions that aid in the absorption of the active pharmaceuticals. However, because all of the solutions are uniform throughout, the combination is categorised as homogenous.

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Most popular questions from this chapter

Identify each of the following changes of state as evaporation. boiling, or condensation:

a. The water vapor in the clouds changes to rain.

b. Wet clothes dry on a clothesline.

c. Lava flows into the ocean and steam forms.

d. After a hot shower, your bathroom mirror is covered with water.

Describe each of the following as a physical or chemical property

a. Neon is a colorless gas at room temperature.

b. Apple slices tum brown when they are exposed to air.

c. Phosphorus will ignite when exposed to air.

d. At room temperature, mercury is a liquid.

e. Propane gas is compressed to a liquid for placement in a small cylinder.

Using the energy values for foods (see Table 3.7), determine each of the following (round off the answer for each food type to the tens place):

athe total kilojoules in two tablespoons of crunchy peanut butter that contains 6gof carbohydrate, localid="1653992607206" 16gof fat, and 7gof protein

bthe grams of protein in one cup of soup that has 110kcalwith 9gof carbohydrate and 6gof fat

cthe kilocalories in one can of cola if it has 40.0gof carbohydrates and no fat or protein

dthe total kilocalories for a diet that consists of 68gof carbohydrate, 9gof fat, and 150gof protein

Use the heat equation to calculate the energy, in joules and calories, for each of the following (see Table 3.11):

a. to heat 5.25gof water from 5.5°Cto 64.8C6

b. lost when 75.0gof water cools from86.4°Cto 2.1°C

c. to heat 10.0gof silver from112°Cto 275°C

d. lost when18.0gof gold cools from224°Cto 118°C

Classify each of the following as a pure substance or a mixture:

a. a soft drink

b. propaneC3H8

c. a cheese sandwich

d. an iron (Fe) nail

e. salt substitutelocalid="1651731802252" (KCI)
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