fooks

[匿名]

回覆: 2

2016-06-13 9:39 am

Calculate the Moriarty of an aqueous NaOH solution if 28.93 mL of a 0.513 M H2SO4 is required to reach the end-point?

[匿名]

回覆: 2

2016-06-13 9:38 am

calculate the molarity of each of the following solutions:?

[匿名]

回覆: 1

2016-06-13 1:05 pm

How many grams of CO(g) are required to produce 49.4 g of acetic acid?

[匿名]

回覆: 2

2016-06-13 10:09 am

Suppose we have a solution of lead nitrate, Pb(NO3)2(aq). A solution of NaCl(aq) is added slowly until no furt?

[匿名]

回覆: 2

2016-06-13 9:39 am

A solution of H2SO4(aq) with a molal concentration of 1.66 m has a density of 1.104 g/mL. What is the molar co?

[匿名]

回覆: 1

2016-06-13 9:55 am

How many molecules of (NH4)2SO4 in of 0.00345 moles?

[匿名]

回覆: 1

2016-06-13 9:40 am

General Chemistry help---Dilution Solution Problem?

[匿名]

回覆: 1

2016-06-13 9:40 am

chemistry> solution concentration: molarity?

[匿名]

回覆: 2

2016-06-13 6:38 am

How much heat is produced by the complete reaction of 6.19kg of nitromethane? Express your answer to three sig figs.?

[匿名]

回覆: 1

2016-06-13 6:41 am

Complete and balance the equation for this reaction in acidic solution....?

[匿名]

回覆: 2

2016-06-13 6:40 am

How much heat is produced by the complete combustion of 205g of CH4?

[匿名]

回覆: 2

2016-06-13 6:41 am

How much heat is produced by the complete reaction of 4.53kg of nitromethane?

[匿名]

回覆: 1

2016-06-13 8:27 am

A sample of aluminium sulfide, Al2S3, contains 0.25 mol of sulfur atoms. The total mass of aluminium in the sample is?

[匿名]

回覆: 2

2016-06-13 6:42 am

A mixture of carbon and sulfur has a mass of 9.0 g. Complete combustion with excess O_2 gives 27.9g of a mixture of CO_2 and SO_2.?

[匿名]

回覆: 1

2016-06-13 8:13 am

What amount of Sodium Nitrate is present in 31.6 grams of the compound?

[匿名]

回覆: 3

2016-06-13 7:28 am

Define Homologous series and Functional group?

[匿名]

回覆: 3

2016-06-13 7:30 am

1. Define the third ionization energy?

[匿名]

回覆: 1

2016-06-13 7:52 am

which ion is most easily reduced Ca2 Zn2 Mg2 co2 ?

[匿名]

回覆: 2

2016-06-13 7:45 am

Fe2 is easily oxidized to Fe3 ; and Mn2 is difficult to oxidize to Mn3 . Explain?

[匿名]

回覆: 3

2016-06-13 6:45 am

What does Concentration and Dilute mean? (Chemistry)?

[匿名]

回覆: 3

2016-06-13 6:45 am

Write balanced complete ionic equation for NaOH(aq) HNO 3 (aq)→H 2 O(l) NaNO 3 (aq)?

[匿名]

回覆: 2

2016-06-13 6:39 am

Complete combustion of 75.0 g acetylene, C2H2, released 3750 kJ of heat. What is the ΔH of acetylene?

[匿名]

回覆: 2

2016-06-13 5:38 am

The densities of gases are generally reported in units of g/L, whereas those for liquids are reported as g/mL.?

[匿名]

回覆: 1

2016-06-13 5:54 am

Chemistry question?

[匿名]

回覆: 1

2016-06-13 5:03 am

Why is the ester hydrolysis slow in the beginning and becomes faster after sometime?

[匿名]

回覆: 1

2016-06-13 4:21 am

CHEMISTRY HELP?

[匿名]

回覆: 1

2016-06-13 4:23 am

i really need help with chemistry problems?

[匿名]

回覆: 2

2016-06-13 4:31 am

Suppose that a department contains 11 men and 15 women. How many ways are there to form a committee wit?

[匿名]

回覆: 2

2016-06-12 9:48 pm

Electro chemistry help!?

[匿名]

回覆: 1

2016-06-12 8:17 pm

Help Please!!! I don't know how to start this problem! An equilibrium mixture contains N2O4, (P= 0.28 atm ) and NO2 (P= 1.1 atm ) at?

[匿名]

回覆: 1

2016-06-12 8:58 pm

A solution is made by dissolving 29g of sodium chloride to a final volume of 202ml solution.What is the weightvolume percent of the solute?

[匿名]

回覆: 1

2016-06-12 9:07 pm

Rank the following compounds from lowest to highest boiling point.?

[匿名]

回覆: 1

2016-06-12 8:19 pm

Please Help! I do not know how to do this!! Please explain! A reaction vessel at 27 ∘C contains a mixture of SO2(P= 2.90 atm ) and O2?

[匿名]

回覆: 3

2016-06-12 8:44 pm

Find an angle in third quadrant for which tan(theta)=1?

[匿名]

回覆: 4

2016-06-12 8:40 pm

11) Given f(x) = 2x^2 + 6x -10, find (f(x+h)-f(x))/h?

[匿名]

回覆: 3

2016-06-10 2:09 pm

為什麼受熱壓力會變大?

[匿名]

回覆: 2

2016-06-12 12:30 pm

某工廠廢水200ml中含Cd2+離子0.001g，則其農度為多少ppm?

[匿名]

回覆: 1

2016-06-12 6:16 pm

求以下算式的X為何?謝謝... X=2X+1=3X=4X+1=5X+1=6X+3=7X=8X+1=9X?

[匿名]

回覆: 2

2016-06-12 3:58 am

Rank the following compounds from lowest to highest boiling point: strontium carbonate, ethane, methanol (CH4O), dimethyl ether (CH3OCH3).?

Andrea

回覆: 1

2016-06-12 3:02 pm

The value of the equilibrium constant for the following reaction is 3.4 x 10^5. 2A + B <---> 2C + 4D?

[匿名]

回覆: 2

2016-06-12 4:24 am

which reaction is not a redox reaction a) KOH + HCl -> KCl + H2O b) 2K +Cl2 -> 2KCl?

[匿名]

回覆: 2

2016-06-12 6:16 pm

help with finding what is oxidized and reduced in these formulas?

[匿名]

回覆: 2

2016-06-12 5:49 pm

Which of the following is NOT true about the Lewis structure of a chemical compound?

[匿名]

回覆: 2

2016-06-12 6:06 pm

All of the following ALWAYS affect rate of the reaction, EXCEPT:?

[匿名]

回覆: 1

2016-06-12 5:34 pm

What is the molar enthalpy using the following reactions? And how much energy is released per gram of hydrazine burned?

[匿名]

回覆: 1

2016-06-12 5:20 pm

Is there a catalyst in the following multi-step reaction?

[匿名]

回覆: 2

2016-06-12 3:59 pm

A precipitate is expected when an aqueous solution of rubidium iodide is added to an aqueous solution of?

[匿名]

回覆: 2

2016-06-12 4:06 pm

Which of the following compounds is soluble in water?

[匿名]

回覆: 1

2016-06-12 4:55 pm

Which substance can be broken down by a chemical change? a. be b. b 3. h2o 4. mg?

[匿名]

回覆: 1

2016-06-12 4:32 pm

How many molecules are there in 85.4 g of PF3?