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3 years ago

A solution of acetic acid, CH3CO2H(aq), is at equilibrium. How would the

Chemistry

1 answer:

umka21 [38]3 years ago

7 0

Answer:

Explanation:

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An 8.89 g sample of an aqueous solution of nitric acid contains an unknown amount of the acid. If 27.1 mL of 0.581 M potassium h

worty [1.4K]

Answer:

The percent by mass of nitric acid in the mixture is 11.1 %

Explanation:

Step 1: Data given

Mass of HNO3 = 8.89 grams

Volume of KOH = 27.1 mL = 0. 0271 L

Molarity of KOH = 0.581 M

Step 2: The balanced equation

HNO 3 + KOH → KNO 3 + H 2 O

Step 3: Calculate the moles of KOH

Moles of KOH = molarity KOH * volume

Moles KOH = 0.581 M * 0.0271 L

Moles KOH = 0.0157 moles

Step 4: Calculate moles of HNO3

For 1 mol of KOH we need 1 mol of HNO3

For 0.0157 moles of KOH we need 0.0157 moles of HNO3

Step 5: Calculate mass of HNO3

Mass KOH = moles KOH * molar mass KOH

Mass KOH = 0.0157 moles * 63.01 g/mol

Mass KOH = 0.989 grams

Step 6: Calculate mass % HNO3 in sample

mass % = (0.989 grams / 8.89 grams)*100%

mass % = 11.1 %

The percent by mass of nitric acid in the mixture is 11.1 %

3 0

4 years ago

A balloon filled with helium has a volume of 30.0 L at a pressure of 100 kPa and a temperature of 15.0°C. What will the volume o

Sholpan [36]

Answer:

$V_2=20.1L$

Explanation:

Hello there!

In this case, since this is a problem in which the pressure of the gas remains constant, we can use the Charles' law as a directly proportional relationship between temperature (in Kelvins) and volume given by:

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

Thus, solving for the final volume as the temperature is decreased to -80.00 °C, we obtain:

$V_2=\frac{V_1T_2}{T_1}$

$V_2=\frac{30.0L*(-80+273)K}{(15+273)K} \\\\V_2=20.1L$

Best regards!

4 0

3 years ago

Given the following formula 2 KCIO3 -> 2 KCI + 3 O2 how many moles of O2 can be produced by letting 12 moles of KCIO3 react?

poizon [28]

1st you need to find the mole ratio between KClO3 and O2. To find that you need to take the coefficents of each of the compounds. That gives a ratio of 2:3.

Now we find out how many each unit is:
2x = 12
x = 6

Now we multiply it by 3 to find the number of moles of O2
3(6) = 18 mol O2.

6 0

3 years ago

Select the correct answer.

slamgirl [31]

Answer: b

Explanation:

5 0

3 years ago

What characteristic of an atom determines its properties? Question options: A.The atomic number of neutrons b.The atomic mass c.

Ilia_Sergeevich [38]

Arrangement of protons in the nucleus

3 0

3 years ago