08/08/23

What is the n-factor of (NH4)2 SO4?
Follows • 2
Expert Answers •1

08/08/23

Increasing the Solubility of Organic Compounds in Water
What are the main ways in which the solubility of organic compounds in water, can be increased?
Follows • 2
Expert Answers •1

08/07/23

Need help with these lab questions
Colorimetric determination of Manganese in steel by standard additions:I need to find the ppm of Mn in KMnO4 standard solution. Now I know the answer to this is 1119ppm however I am not sure on how... more
Follows • 2
Expert Answers •1

08/07/23

Electrons in charge
You perform an electrochemical reaction in which 0.300 mol of Cu+ are reduced to solid CuHow many coulombs of charge are transferred?I calculate the columbs correctly 2.84x 10^4 CBut how would I... more
Follows • 2
Expert Answers •2

08/07/23

Calculate the heat energy released when 26.5 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point.
Constants for mercury at 1 atm heat capacity of Hg(l)Hg(l) 28.0 J/(mol⋅K)28.0 J/(mol⋅K) melting point 234.32 K enthalpy of fusion 2.29 kJ/mol
Follows • 2
Expert Answers •1

08/06/23

Concentration problem Please help
An unknown amount of a compound with a molecular mass of 259.36 g/mol is dissolved in a 10 mL volumetric flask. A 1.00 mL aliquot of this solution is transferred to a 25 mL volumetric flask, and... more
Follows • 2
Expert Answers •1

08/06/23

QUESTION ABOUT HEAT ENERGY IN JOULES
Given the following information for substance X:Specific Heat (c) of solid phase: 2.0 J/g°CHeat of Fusion (Lf): 100 J/gSpecific Heat (c) of liquid phase: 5.0 J/g°CHeat of Vaporization (Lv): 1000... more
Follows • 1
Expert Answers •1

08/05/23

Acid & Base Buffer questions
Find the pH and the volume (mL) of 0.487 M HNO3 needed to reach the equivalence point in the titration of 2.65 L of 0.0750 M pyridine (C5H5N, Kb = 1.7 × 10−9). 
Follows • 2
Expert Answers •1

08/05/23

Help with Absorbance question
Treatment of ammonia with phenol in the presence of hypochlorite yields indophenol, a blue product that absrobs light at 625 nm, which can be used for the spectrophotometric determination... more
Follows • 2
Expert Answers •2

08/04/23

Voltage Generated
The voltage generated by the zinc concentration cell described by the line... more
Follows • 2
Expert Answers •1

08/04/23

oxidation number of As in Na3(AsS3)?
is this correct?(AsS3) --- +3x - 6 = 3x = 9so ON of As is +9
Follows • 2
Expert Answers •1

08/04/23

For the electrochemical cell Pb(s) + Cu²⁺(aq) → Pb²⁺(aq) + Cu(s) (E° = 0.466 V, [Cu²⁺] = 2.50 M), what is the value of E when [Pb²⁺] = 0.055 M? Assume T is 298 K.
Follows • 2
Expert Answers •1

08/03/23

Limiting Reactants
Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 5.7 g of octane is mixed with 32.6 g of oxygen. Calculate the minimum mass of octane that... more
Follows • 2
Expert Answers •1

08/03/23

Solving for a reactant using a chemical equation
Ammonium phosphate is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid with ammonia. What mass of ammonium phosphate is produced by the reaction of 8.00 g of... more
Follows • 2
Expert Answers •1

08/03/23

Solving moles-to-moles limiting reactant problems
Methane gas and oxygen gas react to form carbon dioxide gas and water vapor. Suppose you have 13.0 mol of CH4 and 5.0 mol of O2 in a reactor. Calculate the largest amount of CO2 that could be... more
Follows • 2
Expert Answers •2

08/03/23

What would be the temperature inside the pressure cooker if the vapor pressure of water was 3.60 atm? The enthalpy of vaporization of water is 40.7 kJ/mol.
Follows • 2
Expert Answers •1

08/03/23

Please help me solve this question Not sure where to start
An environmental chemist working for the Environmental Protection Agency (EPA) was directed to collect razor clams from a heavily-contaminated river superfund site and analyze them for... more
Follows • 2
Expert Answers •1

08/03/23

Lab ppm Question help
Hi, guys in a lab report about Iron and its calibration curve I am supposed to solve for the ppm of Fe in a standard solution. My data in the chart says that the ppm should equal 1.04. I'm supposed... more
Follows • 2
Expert Answers •1

08/02/23

Intensity of serum signal Question

The lithium concentration in serum taken from a patient being treated with lithium for manic-depressive illness was analyzed using flame emission spectroscopy. A sample of the serum gave a reading... more
Follows • 2
Expert Answers •1

08/02/23

Please help with calculating ppm
This has to do with the calibration curve of Fethe ppm = 1.04the mL is 50.0concentration of standard Fe = 259.7 ppmabsorbance =0.299 corrected absorbance = 0.278I'm having trouble getting to the... more
Follows • 2
Expert Answers •1

08/02/23

Concentration in %(w/v) please help how do I solve this?
Five standard solutions of a newly discovered inorganic salt were used to create a calibration curve. The density (g/mL) of each solution was plotted on the y‑axis versus the %(w/v) concentration... more
Follows • 2
Expert Answers •1

08/01/23

What is the pH with the activities?
Determine the pH of the same solution including activities. Activity coefficients at various ionic strengths can be found in this table.solution contains 0.045M NaOH and 0.025M KII was able to... more
Follows • 3
Expert Answers •1

08/01/23

Percent yield Chemistry
Liquid hexane CH3CH24CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. If 5.11g of water is produced from the reaction of 7.76g of hexane and 50.3g... more
Follows • 2
Expert Answers •1

07/31/23

Calculate the pH of a 0.035 M sulfuric acid solution
0.891.15 1.46 1.89None of the above
Follows • 2
Expert Answers •2

07/31/23

calculate cell potential
Calculate the cell potential for the galvanic cell in which the given reaction occurs at 25 °C, given... more
Follows • 2
Expert Answers •2

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.