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castortr0y [4]
3 years ago
8

A chemist must prepare of nitric acid solution with a pH of at . He will do this in three steps: Fill a volumetric flask about h

alfway with distilled water. Measure out a small volume of concentrated () stock nitric acid solution and add it to the flask. Fill the flask to the mark with distilled water. Calculate the volume of concentrated nitric acid that the chemist must measure out in the second step. Round your answer to significant digits.

Chemistry
1 answer:
Marina CMI [18]3 years ago
3 0

Answer:

The volume of concentrated nitric acid is

4.3mL

Explanation

Check the attachment

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Hydrogen is special because it can act like two groups, _____<br> and _____
Vedmedyk [2.9K]

Answer: gas and alkaline earth metal

Explanation:

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2 years ago
What common household element can, over time, reduce airflow, insulate components, reduce heat exchange or even cause the system
lina2011 [118]

Answer:

The correct answer is Dust

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3 years ago
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How many milliliters of a 0.211 M HI solution are needed to reduce 24.0 mL of a 0.354 M KMnO4 solution according to the followin
Novay_Z [31]

Answer:

The answer to your question is 242 ml

Explanation:

Data

HI 0.211 M   Volume = x

KMnO₄ 0.354 M   Volume = 24 ml

Balanced Chemical reaction

     12HI + 2KMnO₄ + 2H₂SO₄ → 6I₂ + Mn₂SO₄ + K₂SO₄ + 8H₂O

Process

1.- Calculate the moles of KMnO₄  0.354 M in 24 ml

Molarity = moles / volume (L)

moles = Molarity x volume (L)

moles = 0.354 x 0.024

moles = 0.0085

2.- From the balanced chemical reaction we know that HI and KMnO₄ react in the proportion 12 to 2. Then,

              12 moles of HI --------------- 2 moles of KMnO₄

                x                     --------------- 0.0085 moles of KMnO₄

             x = (0.0085 x 12)/2

             x = 0.051 moles of HI

3.- Calculate the milliliters of HI 0.211 M

Molarity = moles/volume

Volume = moles/molarity

Volume = 0.051/0.211

Volume = 0.242 L or Volume = 242 ml

8 0
3 years ago
Help me on short answers
Phoenix [80]
Here's a short answer



Bye Felicia
7 0
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If the enthalpy value for a reaction is negative, what does that indicate about the reaction? Please explain how you got your an
Elis [28]

The answer is; D

Enthalpy is the system’s internal energy ( considering the product of its pressure and volume). When the enthalpy is negative, it means that the products have a lower energy level than the reactants - meaning the system has dispensed some energy into the environment.

4 0
3 years ago
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