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3 years ago

A chunk of copper has a volume of 1.45 mL and a mass of 12.93 grams. What is the density of the chunk of copper?

Chemistry

2 answers:

babunello [35]3 years ago

8 0

Answer:

8.92 g/ml

Explanation:

Use the formula: density = mass/volume and substitute the values:

density = 12.93 ÷ 1.45 = 8.91724... ≈ 8.92 g/ml

The density of the chunk of copper is 8.92 g/ml

Hope this helps!

natta225 [31]3 years ago

7 0

Answer:

$Density = 8.92 \ g/mL$

Explanation:

The equation for density is:

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

We plug in the given values:

$Density = \frac{12.93 \ g}{1.45 \ mL}$

$Density = 8.92 \ g/mL$

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Mrac [35]

Answer:

$\Delta H=-0.02\ kJ$

Explanation:

The expression for the calculation of the enthalpy change of a process is shown below as:-

$\Delta H=m\times C\times \Delta T$

Where,

$\Delta H$ is the enthalpy change

m is the mass

C is the specific heat capacity

$\Delta T$ is the temperature change

Thus, given that:-

Mass of ammonium nitrate = 1.25 g

Specific heat = 4.18 J/g°C

$\Delta T=21.9-25.8\ ^0C=-3.9\ ^0C$

So,

$\Delta H=-1.25\times 4.18\times 3.9\ J=-20.3775\ J$

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Also, 1 J = 0.001 kJ

So,

$\Delta H=-0.02\ kJ$

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3 years ago

Would you expect a butane lighter to work in winter when the temperature outdoors is 25 ∘F?

kogti [31]

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At -4 °C, the vapour pressure of butane is not great enough to push back against atmospheric pressure.

The lighter won't work.

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MaRussiya [10]

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Acetone: 538,900 $\frac{J}{kg}$

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