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OLEGan [10]
3 years ago
5

How much heat does it take to turn water from -30 degreesC to 120 degreesC?

Chemistry
2 answers:
murzikaleks [220]3 years ago
7 0

110 degrees

is your answer

natka813 [3]3 years ago
4 0

Answer:

110 degrees C

Explanation:

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the chemical formula of magnesium hydroxide is Mg(OH)2

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A sample of gas has a density of 0.53 g/L at 225 K and under a pressure of 108.8 kPa. Find the density of the gas at 345 K under
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Answer:

\rho _2=0.22g/L

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Hello!

In this case, since we are considering an gas, which can be considered as idea, we can write the ideal gas equation in order to write it in terms of density rather than moles and volume:

PV=nRT\\\\PV=\frac{m}{MM} RT\\\\P*MM=\frac{m}{V} RT\\\\P*MM=\rho RT

Whereas MM is the molar mass of the gas. Now, since we can identify the initial and final states, we can cancel out R and MM since they remain the same:

\frac{P_1*MM}{P_2*MM} =\frac{\rho _1RT_1}{\rho _2RT_2} \\\\\frac{P_1}{P_2} =\frac{\rho _1T_1}{\rho _2T_2}

It means we can compute the final density as shown below:

\rho _2=\frac{\rho _1T_1P_2}{P_1T_2}

Now, we plug in to obtain:

\rho _2=\frac{0.53g/L*225K*68.3kPa}{345K*108.8kPa}\\\\\rho _2=0.22g/L

Regards!

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What is dry ice an example of?
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An object has a negative charge if its atoms what
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