Question: Compare and contrast physical and chemical properties of matter.

Answer: Both physical and chemical properties of matter can be used to identify a substance. Physical properties can be observed without changing the substance, however, chemical properties can only be observed when the substance is undergoing a chemical change.

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Question: Define properties:

Answer: physical and chemical characteristics of matter used to describe or identify a substance

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Question: Identify at least three physical properties of matter.

Answer: State of matter, Color, Melting point, boiling point,
Odor, Density, conductivity

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Question: Identify at least three chemical properties of matter.

Answer: Flammability, Corrosion, Oxidation, Reactivity with water

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Question: How do mixtures differ from pure substances?

Answer: A pure substance is an element or compound (elements chemically combined) with definite composition and properties. Mixtures are two substances physically combined.

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Question: Physical properties

Answer: Characteristic that can be observed or measured without changing the substance

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Question: bulk quantities

Answer: Large quantities

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Question: intensive physical property

Answer: is a bulk property and does not depend on the amount of matter.

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Question: extensive physical property

Answer: is proportional to the amount of material.

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Question: Identify if the following is a physical or chemical property: Heating a liquid and measuring the temperature:

Answer: physical

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Question: Identify if the following is a physical or chemical property: Ice turns into a liquid:

Answer: physical

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Question: Identify if the following is a physical or chemical property: Mix two substances and bubbles form:

Answer: chemical

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Question: Identify if the following is a physical or chemical property: A banana turns brown after a few weeks on the counter:

Answer: chemical

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Question: Identify if the following is a physical or chemical property: melting of butter

Answer: physical

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Question: How do mixtures differ from pure substances?

Answer: A pure substance is an element or compound (elements chemically combined) with definite composition and properties.

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Question: Why after mixing two substances and leaving the liquid to settle, some of the substance settles on the bottom is NOT a pure substance?

Answer: Because you PHYSICALLY mixed two substances

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Question: Why after mixing two substances and leaving the liquid to settle, no substance settled is NOT a pure substance?

Answer: Because even though no substance settles you still physically combined two substances

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Question: Why after evaporating a liquid a white powder is left behind is not a pure substance?

Answer: Because after evaporating a substance was left behind showing you mixed two substances together

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Question: Identify if following is physical or chemical property: Ice turns into a liquid: physical

Answer: physical

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Question: Identify if following is physical or chemical property: Heating a liquid and measuring the temperature:

Answer: physical

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Question: Identify if following is physical or chemical property: Mix two substances and bubbles form:

Answer: chemical

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Question: Identify if following is physical or chemical property: A banana turns brown after a few weeks on the counter:

Answer: chemical

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Question: Identify if following is physical or chemical property: Butter melting:

Answer: physical

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Question: Chemical property

Answer: Characteristic that can only be observed or measured when atoms of matter rearrange during a chemical change

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Question: chemical reaction

Answer: The process by which one or more substances change to produce one or more different substances

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Question: Density

Answer: is the amount of mass per unit of volume.

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Question: What's the formula for density?

Answer: D= m/v

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Question: If an object has the mass of 192g and the volume of 32mL what would be its density?

Answer: 6g/mL

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Question: What is the difference between mass and weight?

Answer: Mass is the amount of matter in a material, while weight is a measure of how the force of gravity acts upon that mass.

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Question: If an object has a density of 1.15g/mL would it float or sink in water? Why?

Answer: Sink because its density is greater than water's which is 1 g/mL

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Question: If an object has a mass of 110 g and a volume of 8 mL what would be its density? (round to the nearest tenth)

Answer: 13.8g/mL

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Question: mass

Answer: A measure of how much matter is present in a substance

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Question: Each pure substance has characteristic ____________
and ____________ properties that can be used to describe it.
.

Answer: physical and chemical

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Question: When butter melts, the chemical properties of the substance are ____________.

Answer: the same

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Question: solubility

Answer: is the ability of a substance (the solute), to mix into a liquid (the solvent).

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Question: Exactly forty milliliters of water is measured out in a graduated cylinder. An object is submerged in the water. The level of the water rises to 63 milliliters. When taking the mass of the object on a triple-beam balance the three weights on the beams read: 100, 30, and 4.2.

Answer: Mass = 100 + 30 + 4.2 = 134.2g
63mL - 40mL = 23mL
134.2g/23mL= 5.83g/mL

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Question: An object is a regular, rectangular, and solid with dimensions of 5.0 cm by 4.0 cm by 3.0 cm. It has a mass of 30.0 grams.

Answer: mass= 30 g
5 x 4 x 3 = 60 ㎤
30g/60㎤ = 0.5g/㎤

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