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densk [106]
2 years ago
7

Plz help :( plz help me understand :(

Chemistry
1 answer:
Darina [25.2K]2 years ago
3 0

Answer:

DONT PRESS THAT THAT IS HACK AND VIRUS

Explanation:

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The boiling point is the temperature at which (2 points) Select one: a. A solid becomes a liquid b. A liquid becomes a gas c. A
Anit [1.1K]
The answer is B..............
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3 years ago
What type of reaction is Mg + 2Ag -> mg2 + 2Ag
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2 years ago
An aqueous solution of 1.29 M ethanol, CH3CH2OH, has a density of 0.988 g/mL. The percent by mass of CH3CH2OH in the solution is
anzhelika [568]

Answer:

6%

Explanation:

Hello, for this case, we assume that the volume of the solution is 1L, thus, the mass is given by using the density as follows:

m_{solution}=1L*\frac{1000 mL}{1L}*\frac{0.988g}{1mL} =988g

Now, the mass of the ethanol:

m_{C_2H_5OH}=(1.29molC_2H_5OH/L*1L)*\frac{46gC_2H_5OH}{1molC_2H_5OH} \\m_{C_2H_5OH}=59.34g

Finally, the by mass percent is:

m/m=\frac{59.34g}{988g}*100\\%

%m=6%

Best regards.

4 0
2 years ago
Calculate the second volumes. <br> 7.03 Liters at 31 C and 111 Torr to STP
DIA [1.3K]

The second volume :    V₂= 0.922 L

<h3> Further explanation </h3><h3>Given </h3>

7.03 Liters at 31 C and 111 Torr

Required

The second volume

Solution

T₁ = 31 + 273 = 304 K

P₁ = 111 torr = 0,146 atm

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Use combine gas law :

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3 years ago
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