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Chemistry

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How many mL of .200M acetic acid are mixed with 13.2mL of.200M sodium acetqte to give a buffer with pH=4.2
1. 8 answers
2. 1,978 views
me again8. You are given two beakers, A and B, with colorless liquids in htem. What two tests would you perform to determine
1. 1 answer
2. 600 views
so i got a test and like usual my teacher didn't teach me half of the stuff that's going to be on it so he gave us a pretest of
1. 1 answer
2. 691 views
Ammonia has the formula NH3. Household ammonia is a dilute aqueous solution of NH3 . Aqueous ammonia is a base that can
1. 6 answers
2. 2,183 views
If i used NaCl to try to precipitate Ag+ from a solution, will it be as effective as HCl?
1. 1 answer
2. 387 views
My problem is calculate the molarity of HCl and NaOH(molarity of acid)x(volume of acid)=(molarity of base)+(volume of added
1. 0 answers
2. 595 views
Directions: Use the principles of atomic structure and/or chemical bonding to explain each of the following. In each part, your
1. 1 answer
2. 2,176 views
N2 + 3H2 --> 2NH3At 25°C (delta)Ho = -92.22 kJ and (delta)So = -198.53 J/K. Using this information, calculate the equilibrium
1. 0 answers
2. 833 views
The specific heat of water is at 4.184J/g * degree C. How much heat is evolved, or absorbed, when the temperature of 9.00 mol of
1. 5 answers
2. 810 views
Can some one read my lab report for me...I have it almost finished.. I just need help on the discussion part Please
1. 17 answers
2. 710 views
Which of the following has a standard enthalpy of formation value of zero at 25 degrees C and 1.0 atmA. Fe(s) B. Fe2O3(s) C.
1. 6 answers
2. 6,766 views
The amount of heat required to raise temperature of 55.85 g of iron 1 degrees C is called itsA. Change of energy B. Enthalpy C.
1. 1 answer
2. 1,074 views
Use Lewis symbols to represent the electron transfer between the following atoms to give ions with noble gas configuations:A. Mg
1. 1 answer
2. 1,268 views
Arrange the following in order of increasing ionic radius: I^-, Cs+, and Te^2-. Explain this order
1. 0 answers
2. 551 views
Which has the larger radius N^3- or P^3-?Please Explain
1. 4 answers
2. 918 views
Arrange the members of each of the following pairs in order of increasing radius and explain the order:A. Te, Te2- B. Al, Al3-
1. 3 answers
2. 1,839 views
Write the electron configuration of Sn and Sn2+Give the electron configuration of Cu+ and Cu2+
1. 4 answers
2. 4,320 views
For each of the following, write the electron configuration and Lewis symbol:A. In B. In- C. K+ D. I-
1. 1 answer
2. 764 views
How do I figure out how to write the lewis symbol for the followingA. Br B. Br- C. Sr D. Sr2+
1. 1 answer
2. 394 views
A combustion bomb containing 5.417 g of aluminum metal and 15.974 g of iron III oxide is placed in an ice calorimeter that
1. 1 answer
2. 591 views
If 142.38 g of l water at 21.7 degrees C is placed into a syrofoam cup with 174.36 g of ice at -27.5 degrees C what would be the
1. 1 answer
2. 1,274 views
A certain mine produces 2.5 108 kg of copper from chalcopyrite (CuFeS2) each year. The ore contains only 0.80% Cu by mass.(a) If
1. 0 answers
2. 2,296 views
I asked this question yesterday and it was answered, but I still have a question on it.Standard entropies for substances are
1. 0 answers
2. 1,368 views
I need some help with calculating percent yield and percent purity of aspirin.Here's my data (questions follow): SYNTHESIS Mass
1. 1 answer
2. 1,812 views
Which of the following does form a Group II cation?lead iron cobalt nickel How do you figure this one out? You must know what is
1. 0 answers
2. 696 views
Al3+ and Pb2+ act as acids or bases in acidic or alkaline environment.True or False? I think this is true because they are
1. 0 answers
2. 448 views

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