25,963 Answered Questions for the topic chemistry

Chemistry

04/15/23

Chemistry HW question

Nickel is a transition element and has a variable valence. Using a nickel salt, 2 F (faradays) plate out 39.2 g of nickel. What ions are in the solution of this salt?Atomic molar mass: Ni (58.7 g... more
Follows • 2
Expert Answers •1
Chemistry

04/15/23

Which image depicts the initial atoms when calcium and sulfur form an ionic compound?
Which image depicts the initial atoms when calcium and sulfur form an ionic compound?
Follows • 1
Expert Answers •1
Chemistry

04/15/23

What is the volume occupied by 0.17 grams of gaseous H2S at 27◦C and 380 torr?
Follows • 1
Expert Answers •1
Chemistry

04/14/23

Chemistry question

6. In what respect does an atom of magnesium differ from a magnesium ion (Mg2+)? Could you explain how you got the correct answer? (A) The ion has a more stable electronic arrangement than the... more
Follows • 1
Expert Answers •1
Chemistry

04/14/23

Chemistry lab 10
When the Pb2+ concentration is 1.40 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 2.337V. What is... more
Follows • 2
Expert Answers •1
Chemistry

04/14/23

Question In Description
B) If a cylinder in an automobile engine has a volume of 525 cm3, how many moles of oxygen would be present at 90.0°C and 0.995 atm? Air is 20.95 percent oxygenC) Calculate the maximum number of... more
Follows • 2
Expert Answers •1
Chemistry

04/14/23

how many molecules are in 75.8 g of NaCl?
Follows • 2
Expert Answers •2
Chemistry

04/14/23

Complete and balance the following redox reaction in basic solution. Be sure to include the proper phases for all species within the reaction.
IO3- + Re > ReO4- + IO-
Follows • 2
Expert Answers •1
Chemistry

04/14/23

Complete and balance the following redox reaction in basic solution
MnO4- + C2O4-2 > MnO2 +Co2
Follows • 2
Expert Answers •1
Chemistry

04/14/23

Consider the following equation in aqueous solution: PO₃³⁻(aq) + SO₂(g) → PO₄³⁻(aq) + S²⁻(aq) What is the oxidation number on P in PO₄³⁻?
Follows • 1
Expert Answers •1
Chemistry

04/14/23

The standard cell potential E°(cell) is +0.77 V for the redox reaction 2 Fe³⁺(aq) + H₂(g) → 2 H⁺(aq) + 2 Fe²⁺(aq). Determine E° for the half-reaction Fe³⁺(aq) + e⁻ → Fe²⁺(aq).
Follows • 1
Expert Answers •1
Chemistry

04/14/23

100 g of ice at -5.0 C is added to 30 g of steam at 100 C. Find the final temperature of the resulting water.

Follows • 1
Expert Answers •1
Chemistry

04/13/23

Chem post lab 10
When the Hg2+ concentration is 1.25 M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 2.577V. What is... more
Follows • 2
Expert Answers •1
Chemistry

04/13/23

Calculate and determine.
Nitogen dioxide, NO2​, is a red-brown gas that is considered an air pollutant. When heated, nitogen dioxide gas decomposes into nitrogen monoxide and oxygen gas, according to the following... more
Follows • 1
Expert Answers •1
Chemistry

04/13/23

What is the pH of a solution prepared by mixing 50.00 mL of 0.10 M NH3 with 10.00 mL of 0.10 M NH4Cl? Assume that the volume of the solutions are additive and that Kb = 1.8 × 10-5 for NH3.
Follows • 2
Expert Answers •1
Chemistry

04/13/23

If a chemist wishes to prepare a buffer that will be effective at a pH of 3.00 at 25°C, the best choice would be an acid component with a Ka equal to
Follows • 2
Expert Answers •1
Chemistry

04/12/23

Question in description
In the process of identifying an unknown liquid it was necessary to determine it's molecular weight. The Dumas method was chosen for this measurement. It was found that at a temperature of 98°C and... more
Follows • 2
Expert Answers •1
Chemistry

04/12/23

A sample of an unknown gas weighing 0.144 grams has a volume of 275 mL at 755 mmHg and 97°C. What is the molar mass of the gas?
Ideal law, show work please
Follows • 1
Expert Answers •1
Chemistry

04/12/23

(What is the density (in g/L) of gaseous carbon dioxide, CO2, at 0.893 atm and 47°C
Show work please, use ideal law
Follows • 1
Expert Answers •1
Chemistry

04/12/23

The standard cell potential E°(cell) is +0.34 V for the redox reaction 2 In(s) + 6 H⁺(aq) → 2 In³⁺(aq) + 3 H₂(g). Determine E° for the half-reaction In³⁺(aq) + 3 e⁻ → In(s).
Follows • 2
Expert Answers •1
Chemistry

04/12/23

Acids and Bases
What is the equilibrium constant, K, for the reaction between HCN (Ka = 6.2 x 10⁻¹⁰) and OH⁻ at 25 °C?
Follows • 2
Expert Answers •1
Chemistry Math Biology Calculus

04/12/23

Static Equilibrium
Please help me answer the following question, please provide steps, and work. I know the question is specific, but I did not come up with it. Thanks!Question:In the movie, The Matrix Reloaded, Neo... more
Follows • 1
Expert Answers •1
Chemistry

04/12/23

Calculate the pH
calculate the pH of (a) a solution that is 0.250 M in sodium formate (HCOONa) and 0.100 M formic acid (HCOOH); (b) a solution that is 0.510 M pyridine (C5H5N) and 0.450 M in pyridinium chloride... more
Follows • 1
Expert Answers •1
Chemistry

04/12/23

Titration question
A 20.0 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: (a) 20.0 mL, (b) 23.0 mL, (c) 24.0 mL, (d) 25.0 mL,... more
Follows • 1
Expert Answers •1
Chemistry

04/12/23

A 1.00 L solution saturated at 25 oC with lead(II) iodide contains 0.54 g of PbI2. Calculate the solubility product constant for this salt at 25 oC.
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.