Concept explainers
(a)
Interpretation: Whether the density of a sample of chlorine gas increases, decreases, or remains the same needs to be determined if it is compressed.
Concept Introduction: Density is related to mass and volume as follows:
Here, m is mass and V is volume.
The density of a substance mainly depends on two factors, that is mass and volume. From the formula, it can be said that density is directly proportional to mass and inversely proportional to volume.
Thus, if the mass increases, density increases, and if volume increases, density decreases.
(b)
Interpretation: Whether the density of the lead weight increases, decreases, or remains the same needs to be determined if it is carried up a high mountain.
Concept Introduction: Density is related to mass and volume as follows:
Here, m is mass and V is volume.
The density of a substance mainly depends on two factors that is mass and volume. From the formula, it can be said that density is directly proportional to mass and inversely proportional to volume.
Thus, if the mass increases, density increases, and if volume increases, density decreases.
(c)
Interpretation: Whether the density of the sample of water increases, decreases, or remains the same needs to be determined if it is frozen.
Concept Introduction: Density is related to mass and volume as follows:
Here, m is mass and V is volume.
The density of a substance mainly depends on two factors that is mass and volume. From the formula, it can be said that density is directly proportional to mass and inversely proportional to volume.
Thus, if the mass increases, density increases, and if volume increases, density decreases.
(d)
Interpretation: Whether the density of an iron bar increases, decreases, or remains the same needs to be determined if it is cooled.
Concept Introduction: Density is related to mass and volume as follows:
Here, m is mass and V is volume.
The density of a substance mainly depends on two factors that is mass and volume. From the formula, it can be said that density is directly proportional to mass and inversely proportional to volume.
Thus, if the mass increases, density increases, and if volume increases, density decreases.
(d)
Interpretation: Whether the density of a diamond increases, decreases, or remains the same needs to be determined if it is submerged in water.
Concept Introduction: Density is related to mass and volume as follows:
Here, m is mass and V is volume.
The density of a substance mainly depends on two factors, that is mass and volume. From the formula, it can be said that density is directly proportional to mass and inversely proportional to volume.
Thus, if the mass increases, density increases, and if volume increases, density decreases.
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CHEMISTRY: MOLECULAR...(LL) W/ALEKS
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- Which of the following represent physical properties or changes, and which represent chemical properties or changes? You curl your hair with a curling iron. You curl your hair by getting a “permanent wave” at the hair salon. Ice on your sidewalk melts when you put salt on it. A glass of water evaporates overnight when it is left on the bedside table. Your steak chars if the skillet is too hot. Alcohol feels cool when it is spilled on the skin. Alcohol ignites when a flame is brought near it. Baking powder causes biscuits to rise.arrow_forwardIn each case, identify the italicized property as a physical or chemical property. Give a reason for your choice. The normal color of the element bromine is red-orange. Iron is transformed into rust in the presence of air and water. Dynamite can explode. Aluminum metal, the shiny “foil” you use in the kitchen, melts at 660 °C.arrow_forwardClassify each of the following as aphysical or chemicalchange or property. A fireplace poker glows red when you heat it in the fire. A marshmallow turns black when toasted Loo long in a campfire. Hydrogen peroxide dental strips will make your teeth whiter. If you wash your jeans with chlorine bleach, they will fade. If you spill some nail polish remover on your skin, it will evaporate quickly. When making ice cream at home, salt is added Lo lower the temperature of the ice being used to freeze the mixture. A hair clog in your bathroom sink drain can be cleared with drain cleaner. The perfume your boyfriend gave you for your birthday smells like flowers. Mothballs pass directly into the gaseous state in your closet without first melting. A log of wood is chopped up with an axe into smaller pieces of wood. A log of wood is burned in a fireplace.arrow_forward
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- In each case, decide if the change is a chemical or physical change. (a) A cup of household bleach changes the color of your favorite T-shirt from purple to pink. (b) Water vapor in your exhaled breath condenses in the air on a cold day. (c) Plants use carbon dioxide from the air to make sugar. (d) Butter melts when placed in the Sun.arrow_forwardIn the accompanying photo, you see a crystal of the mineral calcite surrounded by piles of calcium and carbon, two of the elements that combine to make the mineral. (The other element combined in calcite is oxygen.) Based on the photo, describe some of the physical properties of the elements and the mineral. Are any properties the same? Are any properties different? Calcite (the transparent, cube-like crystal) and two of its constituent elements, calcium (chips) and carbon (black grains). The calcium chips are covered with a thin film of calcium oxide.arrow_forwardIn each case, describe the change as a chemical or physical change. Give a reason for your choice. (a) A cup of household bleach changes the color of your favorite T-shirt from purple to pink. (b) The fuels in the space shuttle (hydrogen and oxygen) combine to give water and provide the energy to lift the shuttle into space. (c) An ice cube in your glass of lemonade melts.arrow_forward
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