03/31/20

Using dimensional analysis, calculate how many mL of 0.350M KHP would react with 20.15ml of 0.189M NaOH.

Follows • 2
Expert Answers •1

03/30/20

A sample of gold absorbs 34.6 J of heat as its temperature is increased by 62.0 C. What is the mass of the gold sample? The specific heat of gold is 0.129 j/gx C
Follows • 2
Expert Answers •1

03/30/20

Finding Frequency?
Part 1You have 0.100 mol of H atoms in the ground state. How much energy is required to transition all of the atoms from the ground state to n=5?1.26×105 JPart 2What is the frequency of the light... more
Follows • 2
Expert Answers •1

03/30/20

What is the pH of a buffer system?
What is the pH of a buffer system made by dissolving 10.70 grams of NH Cl and 20.00 mL of 12.0 MNH in enough water to make 1.000 L of solution? Kb = 1.8 × 10 for NH3The correct answer is 9.34
Follows • 2
Expert Answers •1

03/30/20

Calculate the pH of the solution that results when 0.40 g of KHP is dissolved in enough water to produce 25.0 mL of solution.

Potassium hydrogen phthalate (KHP, molar mass = 204.2 g/mol) is a monoprotic weakacid with K = 3.91 × 10 . Calculate the pH of the solution that results when 0.40 g ofKHP is dissolved in enough... more
Follows • 2
Expert Answers •1

03/30/20

Net ionic equation

Balance net ionic equation for reaction of aqueous lead(II)nitrate with aqueous sodium carbonate
Follows • 3
Expert Answers •1

03/30/20

Calculate the molar concentration of an aqueous solution
Calculate the molar concentration of an aqueous solution of the strong base, Ba(OH)2, that has a pH= 11.50I keep getting 3.2*10-3MBut the correct answer is 1.6*10-3M
Follows • 2
Expert Answers •1

03/30/20

Sample of butane C4H10 contains 113 g of carbon. Use unit analysis to calculate the mass of the butane sample.

Set the unit analysis with the necessary components
Follows • 2
Expert Answers •1

03/30/20

Formation of aluminum chloride can be described by balanced equation 2Al+3Cl2 2AlCl3
How many moles of Cl2 molecules are required to react with 1.33 mol Al atoms?
Follows • 2
Expert Answers •1

03/30/20

Chem hw please help
Which of the following is a true statement?A. A system that gives heat off to the surroundings results in a negative change in enthalpy (-ΔH), and is exothermic. B. A system that absorbs heat... more
Follows • 2
Expert Answers •1

03/30/20

chem hw please help!
A student enters the lab and conducts Part A of the Experiment. The student uses 32.00 mL of 2.202 M HCl, and adds NaOH in excess as instructed. If the ΔH of the neutralization reaction is known... more
Follows • 2
Expert Answers •1

03/30/20

How many molecules are in 33.6 liters of neon (Ne) gas at STP?
Follows • 2
Expert Answers •2

03/30/20

How long will it take for a 28 g sample of 236Ra to decay to 3.5 g?
Follows • 2
Expert Answers •1

03/30/20

145.30g zn(no3)2 = moles of ZN(NO3)2
Follows • 2
Expert Answers •1

03/30/20

Chemistry question about amphiprotic species
Which of these species are amphiprotic? Select all that are correct. H2PO4- H2O HSO4- Cl- H3PO4
Follows • 2
Expert Answers •1

03/30/20

Chemistry question about buffers
Which sets of substances can act as buffers? Select all that are correct. NH3 and NH4Cl HNO2 and NaNO2 NaOH and NaCl NH3 and HCl HCl and NaCl I would like understand why some substances can... more
Follows • 2
Expert Answers •1

03/30/20

Will a precipitate form? show calculations
A 0.100 L solution of Ba(NO3)2 has a barium concentration of 0.037 mol/L. If you add 27.0 mL of 0.001 M sodium oxalate (Na2C2O4) to the solution, will a precipitate form? Show your calculations.... more
Follows • 1
Expert Answers •1

03/30/20

Chemistry question about properties of acids.
What properties do acids have in common? Select all that apply. They are caused by acid rain. They make some pigments change color. They are all solid substances. They react with metals to form... more
Follows • 2
Expert Answers •1

03/30/20

Enthalpy of solution calculation (final one)
Hi!I have calculated the enthalpy of solution for anhydrous copper sulfate but I dont know if I did it right or wrong. The values needed to calculate have been given to me from a random student who... more
Follows • 2
Expert Answers •1

03/30/20

If I contain 4 moles of gas in a container with a volume of 75 liters and at a temperature of 425 K, what is the pressure inside the container?
Follows • 2
Expert Answers •1

03/30/20

If I have an unknown quantity of gas at a pressure of 3.2 atm, a volume of 25 liters, and a temperature of 98℃, how many moles of gas do I have?
Follows • 2
Expert Answers •1

03/30/20

Calculate the pH of a solution prepared by adding 20.0 mL of 0.100 M HCl

Calculate the pH of a solution prepared by adding 20.0 mL of 0.100 M HCl to 80.0 mL of a buffer that is comprised of 0.25 M NH3 and 0.25 M NH4Cl. K b of NH3 = 1.8 x 10 -5.The correct answer is 9.17
Follows • 2
Expert Answers •1

03/30/20

stiochiometry mass to mass calculations

how many grams of sodium sulfate are produced when 15.0 g of sulfuric acid is reacted with an excess of sodium hydroxide what mass of anhydrous copper (II) sulfate can be obtained by heating 125... more
Follows • 2
Expert Answers •1

03/30/20

The Ka of a monopratic weak acid is .00410. what is the percent ionization of a .152M solution of this acid?
Follows • 2
Expert Answers •1

03/30/20

What is the solubility in moles/liter for chromium(III) iodate at 25 oC given a Ksp value of 5.0 x 10-6.

What is the solubility in moles/liter for chromium(III) iodate at 25 oC given a Ksp value of 5.0 x 10-6. the answer is:2.07 x 10-2Please show your steps so I can follow along. Thank you!
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.