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Kobotan [32]
3 years ago
13

Calculate the density of a rectangular solid which has a mass of 25.71g. It is 2.30cm long, 4.01 cm wide and 1.82 cm high.

Chemistry
2 answers:
pickupchik [31]3 years ago
3 0
V = a x b x c

V = 2.30 x 4.01 x 1.82

V = 16.78586 cm³

D = m / V

D = 25.71 / 16.78586

D = 1.53 g/cm³
faust18 [17]3 years ago
3 0
<span>Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. Calculation is as follows:

Density = mass / volume = 25.71 g / (</span><span>2.30cm x 4.01 cm x 1.82 cm)
Density = 1.53 g/cm^3</span>
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How to do q solution, qrxn, moles of Mg , and delta Hrxn?
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Answer:

<em> 14, 508J/K</em>

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<em>n</em> moles - 0.1184g

<em>n = 0.0049 moles.</em>

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<em> Heat Capacity, C of MgCl2 = 71.09 J/(mol K)</em>

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<em>= 14, 508 J/K/kg</em>

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⇒ q = 11.27g × 11.1 °C × <em>14, 508 j/K/kg </em>

<em>= 1,7117.7472 J °C-1 g-1</em>

<em />

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<em>=1,7117.7472  ÷ 0.1184 </em>

<em>= 14, 508J/K</em>

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