Dr.A

[匿名]

回覆: 1

2010-12-13 10:47 pm

What is the acid ionization constant for 1.0 Molar Acetic Acid (CH3COOH)?

[匿名]

回覆: 2

2010-12-01 7:53 pm

Calculate Ka for a weak monoprotic acid?

[匿名]

回覆: 3

2010-11-03 5:29 pm

A certain weak acid, HA, has a Ka value of 8.2×10−7.Calculate the percent dissociation of HA in a 0.10 M sol?

用戶232090

回覆: 1

2010-10-09 2:03 am

For the following reaction at 25 oC?

用戶232090

回覆: 2

2010-10-09 12:50 am

For a reaction system which is at equilibrium, which of the following must always be true?

[匿名]

回覆: 2

2010-07-25 4:35 pm

White brass consist 60 % Cu, 25 % Zn, and 15% Ni:?

[匿名]

回覆: 4

2010-06-03 7:44 pm

Balance the following chemical equation: Pb + PbO2 + H2SO4 > H2O + Pb SO4?

[匿名]

回覆: 2

2010-03-23 3:55 pm

sulfuric acid-calculate concentration of ions?

[匿名]

回覆: 2

2010-02-06 11:49 pm

For the following reaction, Kc = 0.513 at 500K. N2 O4g 2NO2g?

[匿名]

回覆: 2

2010-01-29 5:33 pm

Chemistry - Carbon Dating Question?

[匿名]

回覆: 1

2010-01-08 3:28 pm

10mL of 1.0mol/dm-3 sodium chloride is added to 15mL of 0.75 mol/dm-3 silver nitrate solution.?

[匿名]

回覆: 4

2009-09-08 8:31 pm

Sodium carbonate (Na2CO3) reacts with hydrochloric acid (HCl) to give sodium chloride (NaCl) and carbonic acid?

[匿名]

回覆: 4

2009-09-07 7:25 am

Ascorbic acid (vitamin C, ) is a water-soluble vitamin. A solution containing?

[匿名]

回覆: 1

2009-06-21 7:11 am

An oxybromate componud, KBrOx, Where X is unknown , is analysed and found to contain 59.19% Br.?

Refine.J

回覆: 2

2009-03-15 7:07 am

soubility questions (precipiate or dissolve)?

[匿名]

回覆: 2

2009-03-13 8:45 pm

Sodium hydroxide reacts with carbon dioxide as follows: 2NaOH(s)+CO2(g) yields NaCO3(s)+H2O(l)?

[匿名]

回覆: 1

2009-03-11 2:58 am

A flask contains a mixture of Ar and Ne gas...?

iv23361512

回覆: 2

2008-12-13 8:25 pm

Need help with Chemistry "Limiting Reagents".thank you?

[匿名]

回覆: 1

2008-11-06 1:54 am

Which will have greater vapour pressure, hexane or water?

Refine.J

回覆: 1

2008-11-06 2:28 am

chem volume questions?

[匿名]

回覆: 4

2008-10-31 9:37 am

Calculate the pH of concentrated hydrochloric acid if this solution is 27.1 % HCl by weight and has a density ?

[匿名]

回覆: 1

2008-10-28 3:21 am

A closed container is filled with oxygen.The pressure in the container is 455 kPa.What is the pressure in mil?

[匿名]

回覆: 6

2008-10-22 8:25 am

silver nitrate (aq) + sodium hydroxide (aq) ----->?

[匿名]

回覆: 1

2008-09-21 1:59 am

7.67 g of Sr(NO3)2 is dissolved in enough water to form 0.850 L. A 0.100 L sample is withdrawn ...?

[匿名]

回覆: 2

2008-08-21 12:39 pm

Scientific notation, just check and confirm with me!! please?

[匿名]

回覆: 2

2008-06-25 3:21 pm

If the atomic mass of gallium is 69.723 amu, what is the mass of the other isotope, 71Ga?

[匿名]

回覆: 25

2008-06-07 2:13 pm

y = x²+ 2. If x = 3, what is the value of y?

[匿名]

回覆: 5

2008-01-20 5:53 pm

What is the chemical equation for the reaction between sulfuric acid and zinc oxide to form zinc sulphate?

[匿名]

回覆: 4

2007-12-14 7:53 pm

What is the balanced equation for the combustion of propan-1-ol?

in luv with rock^^

回覆: 2

2007-11-24 3:32 pm

CHEMISTRY help?? MOLE question?

in luv with rock^^

回覆: 3

2007-11-24 3:31 pm

CHEMISTRY help? MOLE question?

[匿名]

回覆: 3

2007-07-10 7:44 pm

Phenol, C6H5OH is a weak organic acid:?