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Doss [256]
3 years ago
7

2. The volume of a rock is 5 cm' and its mass is 50 g. Find the density. pls help :)

Chemistry
1 answer:
Vladimir [108]3 years ago
5 0

Answer:

<h2>10 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}\\

From the question we have

density =  \frac{50}{5}  = 10 \\

We have the final answer as

<h3>10 g/cm³</h3>

Hope this helps you

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Answer:

Tetrahedral molecules are normally spy hybridized.

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"What is the change of entropy for 3.0 kg of water when the 3.0 kg of water is changed to ice at 0"
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Q: What is the change of entropy for 3.0 kg of water when the 3.0 kg of water is changed to ice at 0 °C? (Lf = 3.34 x 105 J/kg)

Answer:

-3670.33 J/K

Explanation:

Entropy: This can be defined as the degree of randomness or disorderliness of a substance. The S.I unit of Entropy is J/K.

Mathematically,  change of Entropy can be expressed as,

ΔS = ΔH/T ....................................... Equation 1

Where ΔS = Change of entropy, ΔH = heat change, T = temperature.

ΔH = -(Lf×m).................................... Equation 2

Note: ΔH is negative because heat is lost.

Where Lf = latent heat of ice = 3.34×10⁵ J/kg, m = 3.0 kg, m = mass of water = 3.0 kg

Substitute into equation

ΔH = -(3.34×10⁵×3.0)

ΔH = - 1002000 J.

But T = 0 °C = (0+273) K = 273 K.

Substitute into equation 1

ΔS = -1002000/273

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Determine the chemical formulas for the two compounds below. (Carbon, Hydrogen, and Oxygen).
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Why is it important to use chemicals of high quality (purity) and exact(correct) concentrations in experiments?​
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Learn more : brainly.com/question/8684258

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If the container is closed and the ethanol is allowed to reach equilibrium with its vapor, how many grams of liquid ethanol rema
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Explanation:

Let us assume that the given data is as follows.

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So,     P = \frac{40 torr}{760 torr} \times 1 atm

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Putting the given values into the above equation to calculate the value of n as follows.

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It is known that molar mass of ethanol is 46 g/mol. Hence, calculate its mass as follows.

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Thus, we can conclude that the mass of liquid ethanol is 0.315 g.

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3 years ago
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