胡雪8°

[匿名]

回覆: 3

2019-03-05 9:29 am

A solution is 0.20 M barium hydroxide. How many moles of nitric acid must be added to neutralize 100.0 mL of the solution?

[匿名]

回覆: 1

2019-03-05 7:55 am

what are the concentrations of all species present in 1.00M acetic acid at 20degree celcius ? (for HC2H3O2 Ka= 1.8x10^5)?

[匿名]

回覆: 2

2019-03-05 8:12 am

HELPPPPPP?

[匿名]

回覆: 1

2019-03-05 1:30 am

Calculate the heat change in joules for condensation of 7.90 g of steam at 100∘C.?

[匿名]

回覆: 1

2019-03-05 12:31 am

Find the volume of 0.130 M sulfuric acid necessary to react completely with 76.1 g sodium hydroxide.?

[匿名]

回覆: 1

2019-03-05 1:12 am

Calculate the pH of 310 mL of a 0.80 M aqueous solution of NH3 at 25 °C given that the Ka of NH4Cl is 5.6×10-10.?

[匿名]

回覆: 1

2019-03-05 1:03 am

A large bottle of water containing 825g of water at 9 degrees celsius. How many KJ's are absorbed to warm the water at 22 celsius room temp?

[匿名]

回覆: 2

2019-03-05 12:38 am

Find the moles in a buffer solution using a specified volume?

[匿名]

回覆: 2

2019-03-04 10:44 pm

Find the domain and range of the function y= -3(x-1/3)^2+4/3?

[匿名]

回覆: 2

2019-03-04 10:53 pm

What is the minimum mass?

[匿名]

回覆: 1

2019-03-04 10:37 pm

PHYSICS HELP?

[匿名]

回覆: 1

2019-03-04 2:49 pm

How much heat is produced by the complete combustion of 287 g of CH4?

[匿名]

回覆: 1

2019-03-04 10:59 am

Chemistry Help????

[匿名]

回覆: 2

2019-03-04 10:32 am

Where in the atom do we find protons, neutrons and electrons?

[匿名]

回覆: 2

2019-03-04 9:27 am

A buffer solution is formed by adding 0.200 moles of solid potassium nitrite, KNO₂, to 500.0 ml of 0.600 M Nitrous acid, HNO₂ solution?

[匿名]

回覆: 1

2019-03-04 9:14 am

What are the names of the following compounds?

[匿名]

回覆: 1

2019-03-04 9:25 am

Im not sure how to do this problem: What is the Mass in g of 3.53 moles of glucose (C6H12O6)?

[匿名]

回覆: 1

2019-03-03 3:38 pm

General Chemistry help?

[匿名]

回覆: 2

2019-03-03 6:43 pm

Cu(NO3)2 + NaOH?

[匿名]

回覆: 1

2019-03-03 3:45 pm

Gravitational Force - Physics?

[匿名]

回覆: 2

2019-03-03 3:12 pm

Te C−C−C bond angles in furan are much smaller than those in benzene. The likely reason is which of the following:?

[匿名]

回覆: 1

2019-03-03 11:08 am

Diprotic acids and pH?

[匿名]

回覆: 1

2019-03-03 12:47 am

Number of moles of acetylene in 52 g of acetylene gas? Number moles of water produced for each mole of acetylene used?

[匿名]

回覆: 1

2019-03-02 1:58 pm

CHEMISTRY: Equilibrium Help (Acids and Bases-Diprotic Acid)?

[匿名]

回覆: 1

2019-02-28 12:19 am

A sample of an industrial waste water is analyzed and found to contain 42.4 ppb Fe3+.?

[匿名]

回覆: 4

2019-02-27 11:10 pm

how Do I find the X and Y intercepts of this equation? X(t)= -5x^2+105x+100?

[匿名]

回覆: 1

2019-02-27 9:49 pm

What is the average rate of the reaction during this time period?

[匿名]

回覆: 1

2019-02-27 3:21 pm

f(z)=8z^2-18z+7 Evaluate f(9) and solve f(z)=33 Explain please, if possible.?

[匿名]

回覆: 3

2019-02-27 3:59 pm

What is his gross annual income?

[匿名]

回覆: 2

2019-02-27 2:01 pm

PHYSICS HELP?

[匿名]

回覆: 1

2019-02-27 11:50 am

What is the molarity of a 1.247 L solution that is made from 21.96 g of NaCl? Answer in units of M.?

[匿名]

回覆: 3

2019-02-27 1:26 am

precal help- circles?

[匿名]

回覆: 2

2019-02-27 12:52 am

Find the 600th derivative of f(x)=xe^(−x). Answer: f(600)(x)=?

[匿名]

回覆: 2

2019-02-26 10:03 pm

ph question ?

[匿名]

回覆: 2

2019-02-26 9:37 pm

Calculate the osmotic pressure of each of the following aqueous solutions at 20.00°C:?

[匿名]

回覆: 2

2019-02-26 9:31 pm

pH problem?

[匿名]

回覆: 3

2019-02-26 8:18 pm

A cleaning company found that 14 men took 6 h 40 min to clean a large warehouse.?

[匿名]

回覆: 2

2019-02-26 2:33 pm

How many mols are present in 1.405 Kg of C2H5OH ?

[匿名]

回覆: 1

2019-02-26 3:42 pm

zinc + copper oxide mixed makes?

[匿名]

回覆: 3

2019-02-26 7:01 pm

Can you integrate sin^3(x)cos^3(x) dx this way...?

[匿名]

回覆: 1

2019-02-26 3:58 pm

CHEM QUESTION!!?

[匿名]

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2019-02-26 12:07 pm

How many grams of C are required to react with 11.8g of Fe2O3?

[匿名]

回覆: 2

2019-02-26 11:44 am

determine the volume of .235M sugar solution that can be prepared with .470 moles of sugar.?

[匿名]

回覆: 2

2019-02-26 10:36 am

Help with writing a balanced equation to show how ions can be removed by using sodium carbonate?

[匿名]

回覆: 3

2019-02-26 10:32 am

How many feet tall is 80 cm in inches and feet tall in height?

[匿名]

回覆: 1

2019-02-26 10:25 am

How many moles in 10kg of ammonium phosphate? -(NH4)3PO4?

[匿名]

回覆: 1

2019-02-26 12:07 am

what is the mechanism of this reaction hydrolysis of benzamide???

[匿名]

回覆: 1

2019-02-25 11:53 pm

One boat tows another boat by means of a tow line, which is under a constant tension of 450 N. The boats move at a constant speed of?

[匿名]

回覆: 3

2019-02-25 11:33 pm

The equation of the tangent line of a function f at (7, 5) is y =1/7x + 4. What is f '(7)?

[匿名]

回覆: 1

2019-02-25 9:42 pm

How many grams of AgSCN(Ksp=5*10^-12) dissolve in a) 0,005M KSCN b) 2,3*10^-5 M AgNO3?