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7. What mass of solid NH4Cl and what volume of 1.00 mol-L¹ NaOH solution should be used to prepare 1 L of a buffer solution of pH 9.00? Suppose the overall concentration of the buffer is 0.125 mol-L¹.

Tim Merrifield asked Sep 28, 2024

by Tim Merrifield

8.6k points

2 answers

5 votes

180k views

Use the given Nernst equation, reaction, and conditions to find the potential of this cell. 2Ag+(aq) + Zn(s) → 2Ag(s) + Zn2+(aq) E° = +1.56 volts T = -90°C [Ag+] = 1.0 molar [Zn2+] = 10.0 molar e=e 2.303rt/nf

ISHIDA asked Sep 28, 2024

by ISHIDA

8.5k points

1 answer

5 votes

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Pure samples of H2O exhibit hydrogen bonds, while H2S don't. Which of the following statements does it explain the difference in behaviour between the 2 compounds?

Peedi asked Sep 28, 2024

by Peedi

8.5k points

1 answer

1 vote

50.0k views

What is the IUPAC name to this structure?

Jeroen Landheer asked Sep 28, 2024

by Jeroen Landheer

8.0k points

1 answer

5 votes

318 views

Magnesium ion and other divalent ions form complexes with adenosine triphosphate, ATP: ATP Mg? → Mg-ATP a. Describe an electrochemical cell that would allow you to measure the activity of Mg? at any concentration

Niels Joaquin asked Sep 28, 2024

by Niels Joaquin

7.9k points

1 answer

0 votes

95.6k views

Describe the symbol of Environment (Environmental Hazard). a) Harmful to aquatic life b) Ozone-depleting substances c) Recyclable materials d) Non-hazardous materials

Nithin Kumar asked Sep 28, 2024

by Nithin Kumar

8.4k points

1 answer

0 votes

166k views

What are the chemicals involved with tap water, water jugs and water bottles?

PSR asked Sep 28, 2024

by PSR

8.2k points

1 answer

1 vote

173k views

2AgNO3 + BaCl2 -> 2AgCl + Ba(NO3)2. How many grams of silver chloride are produced from 5.00g of silver nitrate reacting with an excess amount of barium chloride? a) 5.56g b) 11.12g c) 2.78g d) 22.24g

Rhunwicks asked Sep 28, 2024

by Rhunwicks

7.9k points

1 answer

4 votes

86.1k views

What volume of a 3.0 x 10⁻³ M solution is needed to prepare 50.0 mL of a 5.0 x 10⁻⁵ M solution, and how many moles of solute are in this solution? A) 0.5 mL and 2.5 x 10⁻⁸moles B) 50.0 mL and 5.0 x 10⁻⁷

Hossein Nasr asked Sep 28, 2024

by Hossein Nasr

8.5k points

1 answer

5 votes

175k views

There are many fluctuations that may occur in the carbon cycle. Which of the following is NOT a natural cause of the fluctuations of the carbon cycle? A. Industrial activities B. Seasonal variations C.

Ellesmera asked Sep 28, 2024

by Ellesmera

8.9k points

1 answer

1 vote

191k views

Which of the following is a compound? O Cl₂ O H₂O О не OH₂ day

Andy Sander asked Sep 28, 2024

by Andy Sander

7.8k points

1 answer

2 votes

177k views

What materials do I need to test citric acid solution and different concentrations of sodium bicarbonate in the lab changing the energy

Rosh asked Sep 28, 2024

by Rosh

8.0k points

1 answer

5 votes

189k views

A chemical system that results from a chemical reaction has two important components among others in a blend. The joint distribution describing the proportions X and Y of these two components is given

Gzerone asked Sep 28, 2024

by Gzerone

8.9k points

1 answer

2 votes

220k views

What is the sequence of the decapeptide based on the amino acid compositions obtained from partial hydrolysis and the release of PTH-val by Edman's reagent? 1.Ile, Phe 2.Ile, Arg, Ala 3.Arg, Ile 4.Ile,

Abdallah Shakhatreh asked Sep 28, 2024

by Abdallah Shakhatreh

8.6k points

1 answer

0 votes

165k views

What is the chemical formula and charge of the following polyatomic ion: Acetate

Krishnamoorthy asked Sep 28, 2024

by Krishnamoorthy

8.3k points

1 answer

0 votes

76.3k views

Explain why the presence of a functional group causes a molecule to become reactive.

Max Raskin asked Sep 28, 2024

by Max Raskin

8.3k points

1 answer

4 votes

126k views

Determine the number of atoms in 39.0 grams of sodium

Zozo asked Sep 28, 2024

by Zozo

8.3k points

1 answer

3 votes

210k views

What is the molecular weight (in g/mol) of a pure gaseous compound if the gas has a density of 5.21 g/l at -20⁰C and 1,467 torr? write your final answer in two decimal places.

Airfang asked Sep 28, 2024

by Airfang

8.7k points

1 answer

5 votes

13.3k views

Suggest the most important type of intermolecular attractive interaction in the following pairs: (a) n-hexane and n-octane (b) I₂ and CCl₄. a) Dipole-dipole interactions; Dispersion forces b) Hydrogen

Yeak asked Sep 27, 2024

by Yeak

8.1k points

1 answer

4 votes

133k views

According to the following reaction, how many grams of water are needed to form 22.9 grams of oxygen gas? Water (I) → Hydrogen (g) + Oxygen (g)

Alexander Smirnov asked Sep 27, 2024

by Alexander Smirnov

7.7k points

1 answer

1 vote

191k views

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