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Nataly_w [17]
3 years ago
14

A student determined that a 50mL sample of an unknown liquid had a density of 1 g/mL. A 100mL sample of the same liquid would ha

ve a density of 2 g/mL. True or false
Chemistry
1 answer:
Lyrx [107]3 years ago
4 0

Answer: False

Explanation: The density of the liquid will always be the same, no matter how much of the liquid you have.

For example, the density of the water in a pool is the same density as the water in a small cup.

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Please help with #2 and #3
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Answer:

2. V_2=17L

3. V=82.9L

Explanation:

Hello there!

2. In this case, we can evidence the problem by which volume and temperature are involved, so the Charles' law is applied to:

\frac{V_2}{T_2}=\frac{V_1}{T_1}

Thus, considering the temperatures in kelvins and solving for the final volume, V2, we obtain:

V_2=\frac{V_1T_2}{T_1}

Therefore, we plug in the given data to obtain:

V_2=\frac{18.2L(22+273)K}{(45+273)K} \\\\V_2=17L

3. In this case, it is possible to realize that the 3.7 moles of neon gas are at 273 K and 1 atm according to the STP conditions; in such a way, considering the ideal gas law (PV=nRT), we can solve for the volume as shown below:

V=\frac{nRT}{P}

Therefore, we plug in the data to obtain:

V=\frac{3.7mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm}\\\\V=82.9L

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What was thompson working with when he discovered the cathode rays?
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Si se adiciona etilenglicol (compuesto no volátil) a agua destilada:
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Answer:

Hey hi

Explanation:

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What type of reaction is: CaO + H2O -> Ca(OH)2? A. Combustion B. Synthesis C. Double Replacement D. Decomposition
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In the case of this reaction, it corresponds to a synthesis where 2 compounds (calcium oxide and water) are combined to form a new one (calcium hydroxide).

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