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3 years ago

Which two of the following are the densest of the materials shown?

Physics

1 answer:

kari74 [83]3 years ago

3 0

Explanation:

The density of the material is given by,

Density = $\frac{mass}{Volume}$

Case 1: Rock

Density = $\frac{mass}{Volume}$

Density = $\frac{1000}{0.5}$

Density = 2000 $\frac{g}{L}$

Case 2: Pillow

Density = $\frac{mass}{Volume}$

Density = $\frac{200}{10}$

Density = 20 $\frac{g}{L}$

Case 3: Bottle of Soda

Density = $\frac{mass}{Volume}$

Density = $\frac{2000}{2}$

Density = 1000 $\frac{g}{L}$

Case 4: Load of bread

Density = $\frac{mass}{Volume}$

Density = $\frac{100}{1}$

Density = 100 $\frac{g}{L}$

Thus, rock and bottle of soda has maximum density.

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Read 2 more answers

A sample of n2 gas occupies a volume of 746 ml at stp. What volume would n2 gas occupy at 155 ◦c at a pressure of 368 torr?

musickatia [10]

Answer:

2.41 L

Explanation:

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$\frac{p_1 V_1}{T_1}=\frac{p_2 V_2}{T_2}$

where we have:

$p_1 = 1.01\cdot 10^5 Pa$ (initial pressure is stp pressure)

$V_1 = 746 mL = 0.746 L = 7.46\cdot 10^{-4}m^3$ is the initial volume

$T_1 = 0^{\circ}=273 K$ is the initial temperature (stp temperature)

$p_2 = 368 torr = 4.9\cdot 10^4 Pa$ is the final pressure

$V_2 = ?$ is the final volume

$T=155^{\circ}=428 K$ is the final temperature

By substituting the numbers inside the formula and solving for V2, we find the final volume:

$V_2 = \frac{p_1 V_1 T_2}{T_1 p_2}=\frac{(1.01\cdot 10^5 Pa)(7.46\cdot 10^{-4} m^3)(428 K)}{(273 K)(4.9\cdot 10^4 Pa)}=2.41\cdot 10^{-3} m^3$

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