03/22/18

Two solutions are combined, 100 ml of 1 M NaOH and 100 ml of 1.5 M H2SO4. What is leftover, H+ or OH-, and what is its concentration in the solution?
The balanced equation is 2NaOH + H2SO4 -> Na2SO4 + 2 H20
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03/22/18

Synthesis of Methyl Diantilis chemical equation
Synthesis of Methyl Diantilis chemical equation hohijo hoihjoj hoijhkijio hiohijo..............
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03/22/18

What is the [H3O+] of a solution that is 0.0100M HNO2 Ka=4.5×10^-4 and 0.0100M in NaNO2?
A. 2.14×10^-4M B. 7.41×10^-4M C. 1.17×10^-4M D. 1.45×10^-4M E. 4.5×10M  
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03/22/18

What is the pOH of an aqueous solution of 0.500M trimethlyline, a weak base with Ka=6.3×10^-5 with the formula (CH3)3N?
A. 9.8 B. 7 C. 4.2 D. 2.25 E. Less than 1
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03/22/18

How do I solve this AP Chemistry problem on Kb
In the laboratory, a general chemistry student measured the pH of a 0.599M aqueous solution of C2H5NH2 (a weak base) to be 12.192. What is Kb for this base?
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03/22/18

A 0.10M solution of which of the following salts is most basic?
A. NH4F B. NH4NO2 C. NH4CH3COO D. NH4OCl E. NH4CN  
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03/22/18

What reaction occurs when NH4Br dissolves in water?
A. NH4+ + OH- <==> NH4OH B. Br-+ H3O <==> HBr+ H2O C. NH3+H2O <==>NH4+OH D. NH4+H2O <==> NH3+H3O+ E. Br- + H2O <==> HBr+ OH-
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03/22/18

How do I solve this pH problem?
1. A solution is prepared in which 1.0 mol NaNO2 and 1.5 mol HNO2 are added to a liter of aqueous solution. What is the pH of the solution?   2. Suppose 3.65 grams of HCl are added to the... more
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03/22/18

What is NH4+ concentration of the 3.0M ammonia solution below?
Acid: HF  Conjugate base: NH3 Ka: 7.2×10^-4 pKa: 3.14   Kb: 1.8×10^-5   pKb: 4.74
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03/22/18

What is the pH of 3.0M aqueous solution of NH3?
NH3 information    Base: NH3   Conjugate Acid: HF   Kb: 1.8×10^-5   pKb: 4.74
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03/22/18

What is the pH of a 0.400M solution of HF
Information for HF   Acid: HF    Ka: 7.2×10^-4   pKa: 3.35   Conjugate Base: NH3   Kb: 1.8×10^-5   pKb: 4.74
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03/22/18

25.9g of carbon monoxide is under a pressure of 123.9 mmhg and a temperature of 34.5 defrees Celsius. What volume does this gas occupy?
This is a 9th grade science quest and the answer is needed ASAP
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03/22/18

problem homework
The gas in a piston (defined as the system) is warmed and absorbs 655 J of heat. The expansion performs 349 J of work on the surroundings.What is the change in internal energy for the... more
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Hw1

03/22/18

homework help
When 0.594 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.3 ∘C to 30.0 ∘C.Find ΔErxn for the combustion of biphenyl in kJ/mol biphenyl. The heat... more
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03/21/18

How many moles of ammonia can be made from 6mole of hydrogen molecules and 6 moles of nitrogen molecules
Hydrogen is h
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03/21/18

Algebra question
A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is 40% salt and Solution B is 90% salt. She wants to obtain 150 ounces... more
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03/21/18

5 moles of a nonelectrolyte is dissolved in 3000 grams of water. What would be the new freezing point of the resulting solution?
please help
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03/21/18

When 266.53 grams of Bi2O3 react with excess of C, how many moles of Bi form?
i need help i am somewhat confused
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03/21/18

ACID SOLUTION % ?
Can a acid solution be both 96%w/w and 50%v/v? That is what the label reads.
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03/21/18

How many grams of barium sulphate could be obtained from 137g of barium chloride via the ionic precipitation reaction of barium chloride and sodium sulphate?
Its too complicated for us its a lot of us that don't understand please help the teacher havent even taught us this topic. Help please as soon as possible its for tomorrow.
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03/21/18

a food sample contains 10g fat, 12g carbohydrate, and 8g protein. the energy content is
a food sample contains 10g fat, 12g carbohydrate, and 8g protein. the energy content is
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03/21/18

There are 16 ounces in a pound. How many pounds are in 52 ounces
I really need help because I am failing so help me
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03/21/18

When an object is pushed across a surface, what two forces act upon it?
I need help for this question so I can get a good grade on 
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03/21/18

When bound by their ligand, which of the following class(es) of receptors cause an increase in cellular kinase activity?
The phosphorylation of proteins by enzymes called kinases is an important intracellular event. When bound by their ligand, which of the following class(es) of receptors cause an increase in... more
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03/21/18

If a drug has a concentration of 275 mg per 10 mL, how many mL are needed to give 1 gram of the drug?
 i need help please
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