QUESTION IMAGE
Question
name
section 2 review
section vocabulary
boling point the temperature at which a liquid becomes a gas
density the ratio of the mass of a substance to the volume of the substance; commonly expressed as grams per cubic centimeter for solids and liquids and grams per liter for gases
melting point the temperature and pressure at which a solid becomes a liquid
reactivity the capacity of a substance to combine chemically with another substance
- list list five physical properties.
- calculate what is the density of a rock that has a mass of 454 g and a volume of 100.0 cm³?
- infer brand x aluminum foil is thicker than brand y. is thickness a physical property or chemical property? explain your answer.
- apply concepts how could you use the physical properties of melting point and boiling point to identify a substance?
- explain iron is much denser than a feather. yet, a particular sample of feathers weighs more than a sample of iron. explain how this is possible.
1.
Los propiedades físicas son características observables y medibles sin alterar la identidad química de una sustancia. Algunas propiedades físicas comunes son: color, olor, densidad, punto de fusión y punto de ebullición.
Step1: Usar fórmula de densidad
La densidad ($
ho$) se define como $
ho=\frac{m}{V}$, donde $m$ es la masa y $V$ es el volumen.
Step2: Sustituir valores dados
Dado $m = 454$ g y $V=100.0$ cm³, entonces $
ho=\frac{454\text{ g}}{100.0\text{ cm}^3}=4.54$ g/cm³
La espesor es una propiedad física porque se puede medir sin alterar la composición química del aluminio. Es una característica que describe la forma y las dimensiones del material.
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Color, olor, densidad, punto de fusión, punto de ebullición
2.