Concept explainers
(a)
Interpretation:
Whether the phenomenon of slicing an orange into wedges is a physical or a chemical change is to be stated.
Concept introduction:
The phenomenon in which matter is rearranged without losing its identity is called a physical change. The phenomenon in which matter changes its form and loses its identity is called a chemical change. A chemical change results from a
(b)
Interpretation:
Whether the phenomenon of fermenting apples into apple cider is a physical or a chemical change is to be stated.
Concept introduction:
The phenomenon in which matter is rearranged without losing its identity is called a physical change. The phenomenon in which matter changes its form and loses its identity is called a chemical change. A chemical change results from a chemical reaction, while a physical change results when matter changes forms, but not its chemical identity.
(c)
Interpretation:
Whether the phenomenon of grinding sugar crystals into powder is a physical or a chemical change is to be stated.
Concept introduction:
The phenomenon in which matter is rearranged without losing its identity is called a physical change. The phenomenon in which matter changes its form and loses its identity is called a chemical change. A chemical change results from a chemical reaction, while a physical change results when matter changes forms but not its chemical identity.
(d)
Interpretation:
Whether the phenomenon of digesting carbohydrates for energy is a physical or a chemical change is to be stated.
Concept introduction:
The phenomenon in which matter is rearranged without losing its identity is called a physical change. The phenomenon in which matter changes its form and loses its identity is called a chemical change. A chemical change results from a chemical reaction, while a physical change results when matter changes forms but not its chemical identity.
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EP INTRODUCTORY CHEM.-MOD.MASTERINGCHEM
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- The freshly polished brass cylinder in the picture below is a mixture of copper and zinc. Is the cylinder a homogenous or heterogeneous substance?arrow_forwardState the term that applies to each of the following changes of physical state: (a) Snow changes from a solid to a liquid. (b)Gasoline changes from a liquid to a gas. (c) Dry ice changes from a solid to a gas.arrow_forwardA good example of a homogeneous mixture is(a) a cola drink in a tightly capped bottle(b) distilled water leaving a distillation apparatus(c) oxygen gas in a cylinder used in welding(d) the material produced in a kitchen blenderarrow_forward
- Indicate wether each of the following samples of matter is a heterogenous mixture, homogenous mixture a compound or an element. a) A colorless gas, only part of which reacts with hot ironarrow_forwardClassify each of the following as an element, compound, or mixture. (a) iron metal (b) oxygen gas (c) iron oxide (d) iron orearrow_forwardA substance has a definite shape and definite volume. What is the state of the substance?(a) solid (b) liquid (c) gasarrow_forward
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