Based on the color of the solutions, determine the direction of the reaction equilibrium shift upon addition of each reagent investigated and write the chemical reaction involving the reagent that is responsible for the shift. Each of the following reagents was added to FeSCN2+ (aq) and the color change is indicated. I'm not sure of the product side of each reaction, please help.

a) Fe(NO3) + FeSCN2+ turned from red to dark red (This one might not have an equation)

b) NH4SCN + FeSCN2+ red turned black

c) SnCl2 + FeSCN2+ red turned cloudy orange

d) AgNO3 + FeSCN2+ red turned cloudy white

e) NaCl + FeSCN2+ red turned orange

f) NaOH + FeSCN2+ red turned dark yellow

g) Na2HPO4 + FeSCN2 red turned clear

1-A solution has a temperature change of 20 K. What is the temperature change in degree Celsius?

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Question 2

Students used two thermometers in Thermo lab. If both thermometers consistently read temperature exactly 1.0 degree higher than the actual temperature, how does this affect the experimental molar heat of neutralization?

A-It has an unknown impact on the molar heat of neutrailization.

B-This will make the molar heat of neutrailization higher

C-Since the temperature differences are used in all caculations, this should not affect the molar heat of neutralization

D-This will make the molar heat of neutrailization lower

Question 3

Specific heat capacity of water is 4.184 J/(g C). What is its molar heat capacity?

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Question 4

50.0 mL of 2.00 mol/L HNO3 solution and 50.0 mL of 1.00 mol/L NaOH solution, both at 20.0 degree Celsius, were mixed in a calorimeter. Calculate the molar heat of neutralization of HNO3 in kJ/mol if:

(1) final temperature was 27.2 degree Celsius;

(2) the mass of the overall solution was 102.0 g;

(3) the heat capacity of the calorimeter was 25.0 J/C;

(4) and assume that the specific heat of solution is the same as water, 4.184 J/(g C);

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Question 5

A solution of X was mixed with a solution of Y to react. Both X and Y were at the same initial temperature. However, after the reaction, the combined solution got much hotter. Which one is correct about this reaction between X and Y?

A-Exothermic with positive enthalpy of reaction

B-Endothermic with negative enthalpy of reaction

C-Endothermic with positive enthalpy of reaction

D-Exothermic with negative enthalpy of reaction

Question 6

The lines observed in H-lamp are parts of Balmer Series. All these lines are due to a transition from various higher n value to a common n. What is this common lower n value for all these lines? (Hint: the information can be found around "Calculations" area on page 8-67)

A- 0

B- 2

C- 1

D- 3

Question 7

Red and purple are two lines of hydrogen lamp. Which one is correct when comparing these two lines? Choose all that apply.

1-The light of red line travels faster than the purple one.

2-Red line has smaller energy than the purple one.

3-Red line has longer wavelengthh than the purple one.

4-Red line has higher frequency than the purple one.

Question 8

Since we can only see visible lines from a hydrogen lamp, hydrogen lamp does not produce any UV light.

True

False

Question 9

Evaporation of water.........

1-is exothermic

2-has positive enthalpy change

3-is endothermic

4-has negative enthalpy change

Question 10

Which of the following transition in a hydrogen atom will end up releasing the highest amount of energy?

A- n = 10 to n = 3

B- n = 1 to n = 2

C- n = 10 to n = 10000

D- n = 3 to n = 2

Can someone explain to me the difference between atomic mass, mass number, and atomic weight.

I have 4 different textbooks saying different things and I am so confused.

Is atomic mass and mass number the same thing? Or is atomic mass and atomic weight the same thing? Or are all three terms different things with different meanings?

Can someone please clarify in simple terms the meaning of these three terms and give an example for each, thanks so much! I am studying for the MCAT and would really appreciate the help!

Could someone explain how to solve this for me?

We have been studying fluoride in drinking water. If you were to examine your toothpaste one of the active ingredient is most likely to be sodium fluoride. Given theinformation below write the equation associated with each one of the following energies,daw the Born Haber Cycle and calculate the lattice energy for the formation of Sodiumfluoride.

First Ionization energy of Na: 496 kJ/molFirst

Electron affinity of F: –328 kJ/mol

Enthalpy of atomization Na: 108 kJ/molF2

bond energy: 159 kJ/mol

Enthalpy of formation of NaF(s) = –574 kJ/mol

10.35) predict the geometry of the following ions using the electron-pair repulsion model

A) Clo_3²

B) Po_4³²

C) SCN²

D) H₂O¹

10.34 ) use the electron-pair repulsion model to predict the geometry of the following molecules

A) GeCl₂

B). AsCl₃

C) So₃

D) XeO₄

10.53 ) what hybrid orbitals would be expected for the central atom in each of the following

A). XeF₂

B) BrF₅

C). PCl₅

D). ClF₄¹

A nuclear power plant operates at 40.0% efficiency with a continuous production of 1002 MW of usable power in 1.00 year and consumes 1.03×10⁶ g of uranium-235 in this time period. What is the energy in joules released by the fission of a single uranium-235 atom?

What is inductance? What is the origin of inductance? What is impedance? How
can you use a capacitor and an inductor together in a circuit to achieve a desired
impedance?

The main energy-coupling compound in biochemical reactions that allows thermodynamically unfavorable processes to become favorable is ________.

1) what are the effect of leaving groups when comparing 1-chlorobutane vs. 1-bromobutane and compared 2-chlorobutane vs. 2-bromobutane. 2) What are the effect of structures – 1°, 2°, and 3° halides when comparing 1-chlorobutane vs. 2-chlorobutane vs. 2-chloro-2-methylpropane and comparing 1-bromobutane vs. 2-bromobutane vs. 2-bromo-2-methylpropane. 3) What is the effect of steric hinderance when compairing 1-chlorobutane vs. 1-chloro-2-methylpropane. 4) What is the difference in reactivity of alkyl halide when comparing bromocyclohexane vs. bromocyclopentane in SN reaction. 5) What is the difference in reactivity of alkyl halide when comparing bromocycllohexane vs. bromocyclopentane in SN2 reaction.

10.41 predict the geometries of the following

A) SaCl₅³

B) PF₆²

C) CIF₂²

D) IF₄²

Suppose a 50 year old female presents to the ER with chest pain after eating a meal consisting of a large portion of red meat, creamy sauce, and potatoes. The woman's bloodwork shows very elevated levels of serum cholesterol. It is likely she had a heart attack and will start taking statins in order to reduce her cholesterol levels. What impact do the statins have on HDL, LDL, and her triglyceride levels?

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Be sure to answer all parts A 10.0−mL solution of 0.690 M NH3 is titrated with a 0.230 M HCl solution. Calculate the pH after the following additions of the HCl solution: (a) 0.00 mL (b) 10.0 mL (c) 30.0 mL (d) 40.0 mL