10/25/19

chemistry question
A sample of a mixture containing CaCl2 and MgCl2 weighed 2.000 g.The sample was dissolved in water, and H2SO4 was added until the precipitation of CaSO4 was complete.CaCl2(aq) + H2SO4(aq) →... more
Follows • 1
Expert Answers •1

10/25/19

what is the molar concentration.
Stomach acid" is hydrochloric acid. A sample of gastric juice having a volume of 4.67 mL required 18.93 mL of 0.0131 M KOH solution for neutralization in a titration. What was the molar... more
Follows • 1
Expert Answers •1

10/25/19

What is the Molarity?
In a titration, a sample of H2SO4 solution having a volume of 20.48 mL required 36.26 mL of 0.169 M NaOH solution for complete neutralization.What is the molarity of the H2SO4 solution?
Follows • 1
Expert Answers •1

10/25/19

how many grams of na2co3 are there are?
When 35.00 mL of Na2CO3 was reacted with 29.06 mL of a 0.125 M CaCl2 solution, all of the carbonate ion precipitated as CaCO3. How many grams of Na2CO3 were in the solution?
Follows • 1
Expert Answers •1

10/25/19

How many grams of na2so4 are in solution?
A solution containing Na2SO4 was treated with 0.250 M BaCl2 solution until all the sulfate ion had reacted to form BaSO4. The net reactionBa2+(aq) + SO42-(aq) → BaSO4(s)required 32.3 mL of the... more
Follows • 1
Expert Answers •1

10/24/19

what is the molality of nitric acid in a concentrated solution of nitric acid (68% HNO3 by mass)?
Follows • 1
Expert Answers •3

10/24/19

This is chemistry
A 25g piece of golf and a 25 g piece of aluminum, both heated to 100 degrees Celsius, are put in identical calorimeters. Each calorimeter contains 100.0 g of water at 20 degrees Celsius. What is... more
Follows • 0
Expert Answers •1

10/23/19

Convert 5.27*10-13kg to ng
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 9
In a 0.22 M solution of sodium acetate, what concentration (M) of hydronium ions comes from the self-ionization of water? pKb for acetate anion is 9.246
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 8
Calculate the percentage of acetic acid that exists in ionized form when dissolved in water at 0.3 M total concentration.Ka(HOAc) = 1.76 x 10-5.
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 7
Determine the pH of a 0.12 M aqueous solution of ammonia.Kb(NH3) = 1.8x10-5.
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 6
An aqueous solution containing 0.24 M of unknown base has a measured pH equal to 8.39. What is the value of pKb for the unknown base?
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 5
In a 0.1 M solution of chlorous acid, what percentage of the acid is ionized to the chlorous anion, ClO2-? Ka = 1.1 x 10-2
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 4
A solution is made by adding 0.35 mol of lithium hydroxide (LiOH) in enough water to form 3 L of solution. Calculate the pH.
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 3
If the concentration of an acid in solution is 1.8 times larger than the concentration of its conjugate base, and the pH of the solution is 2.5, what is the pKa of the acid?
Follows • 1
Expert Answers •1

10/23/19

Acids & Bases Chemistry Math Question 2
Compute the pH of a solution formed by adding 11.6 g of baking soda (sodium bicarbonate) to enough water to make a 250.0 mL solution. The acid dissociation constants for carbonic acid are pK1=6.35,... more
Follows • 1
Expert Answers •1

10/23/19

The water in a garden hose flows at a rate of 10.0 liters per minute. What is the flow rate in gallons per hour? (1gal=3.79L)
Follows • 0
Expert Answers •1

10/23/19

Chemistry-resonance structures
what molecules have resonance structure? There should be 3.HCN, SeF6, NO2-, AsF5, XeF2, TeF5-, H2CO, SF4, XeF4, PO43-, BrF3, NH3, CH3NH2, SF5+, and C2H2.I think NO2-, PO43-(Chrome said that it is,... more
Follows • 1
Expert Answers •1

10/23/19

Reaction Rates Problem
The reaction C4H8 (g) -> 2C2H4 (g) has an activation energy of 262KJ/mol. At 600K, the rate constant, k,  is 6.1x10^-8s-1. What is the value of the rate constant at 805K?
Follows • 1
Expert Answers •1

10/23/19

Reaction Rates Problem
A certain reaction has an activation energy of 58.63KJ/mol. At what Kelvin temperature will the reaction proceed 6.50 times faster than it did at 357 K?
Follows • 1
Expert Answers •1

10/22/19

Complete and balance the following half-reaction in basic solution
Cr(OH)3(s) --> CrO42-(aq)
Follows • 1
Expert Answers •1

10/22/19

Complete and balance the following redox reaction in basic solution
MnO4-(aq) +Br-(aq) --> MnO2(s) +BrO3-(aq)
Follows • 1
Expert Answers •1

10/22/19

Complete and balance the following redox reaction in basic solution
IO3-(aq) + Re(s) --> ReO4-(aq) + IO-(aq)I got 7IO3-(aq) + 4Re(s) --> 4ReO4-(aq) + 7IO-(aq) +4H+(aq) but it says I got it wrong
Follows • 1
Expert Answers •1

10/22/19

Complete and balance the following half-reaction in basic solution
Mn2+(aq) to MnO2(s)I got Mn^2+ + 2H2O to MnO2 + 4H+ +2e- but it says I'm wrong and I only have 1 try left
Follows • 1
Expert Answers •1

10/22/19

Stoichometry Chemistry Question About Concentration Ions
You react 100.0 mL of 0.100 M lead(II) nitrate with 200.0 mL of 0.250 M potassium iodide. What is the concentration of I− ions left in solution after the reaction is... more
Follows • 1
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.