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Lilit [14]
3 years ago
13

Which piece of equipment would be most useful for measuring the volume of some water?

Chemistry
2 answers:
ryzh [129]3 years ago
6 0
A graduated cylinder. :)
kicyunya [14]3 years ago
5 0
<span>graduated cylinder is the answer</span>
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Passing an electric current through a sample of water (H2O) can cause the water to decompose into hydrogen gas (H2) and oxygen g
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2H2O --> 2H2 + O2
The mole H2O:mole O2 ratio is 2:1
Now determine how many moles of O2 are in 50g: 50g × 1mol/32g = 1.56 moles O2
Since 1 mole of O2 was produced for every 2 moles of H2O, we need 2×O2moles = H2O moles
2×1.56 = 3.13 moles H2O
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D) 56.28
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Leni [432]

Answer:

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Explanation:

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Where:

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T_{f}: is the final temperature = 500 K

Hence, the entropy change is:

\Delta S = \frac{5.0 \cdot 10^{6} J}{1.38 \cdot 10^{-23} J/K}(\frac{1}{500 K} - \frac{1}{1000 K}) = 3.62 \cdot 10^{26}                                    

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I hope it helps you!          

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