QUESTION IMAGE
Question
- the density of silver is 10.5 g/cm³. find the mass of silver that occupies 9.65 cm³ of space.
- a 5 - ml sample of water has a mass of 5 g. what is the density of the water?
- an object with a mass of 7.5 g raises the level of water in a graduated cylinder from 25.1 ml to 30.1 ml. what is the density of the object?
- the density of gold is 19.3 g/cm³. if you place a piece of gold in a glass with water, would the gold float? explain
Step1: Usar fórmula de densidad para el plata
La densidad $
ho=\frac{m}{V}$, entonces $m =
ho\times V$. Dado $
ho_{plata}=10.5\ g/cm^{3}$ y $V = 9.65\ cm^{3}$, entonces $m_{plata}=10.5\times9.65$.
$m_{plata}=10.5\times9.65 = 101.325\ g$
Step2: Calcular densidad del agua
Dado $m_{agua}=5\ g$ y $V_{agua}=5\ mL = 5\ cm^{3}$ (ya que $1\ mL=1\ cm^{3}$), usando $
ho=\frac{m}{V}$, entonces $
ho_{agua}=\frac{5}{5}=1\ g/cm^{3}$
Step3: Calcular volumen del objeto y su densidad
El volumen del objeto $V_{objeto}$ es el cambio en el nivel del agua en el cilindro graduado. $V_{objeto}=30.1 - 25.1=5\ mL = 5\ cm^{3}$. Dado $m_{objeto}=7.5\ g$, entonces $
ho_{objeto}=\frac{m_{objeto}}{V_{objeto}}=\frac{7.5}{5}=1.5\ g/cm^{3}$
Step4: Decidir si el oro flota
La densidad del agua es $1\ g/cm^{3}$ y la densidad del oro $
ho_{oro}=19.3\ g/cm^{3}$. Como $
ho_{oro}>
ho_{agua}$, el oro no flota.
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- $101.325\ g$
- $1\ g/cm^{3}$
- $1.5\ g/cm^{3}$
- No flota, ya que $
ho_{oro}=19.3\ g/cm^{3}>
ho_{agua}=1\ g/cm^{3}$