Difference between Mass Spectrometry, Infrared spectroscopy(IR), & nuclear magnetic resonance spectroscopy(NMR)?

10.00 ml of a solution of an analyte gives a signal of 30 mV in an instrumental analysis. after the addition of 2e-5 mole standard, the signal rises to 75 mV. what is the concentration of the analyte in the original solution? assuming the total volume doesn't change.

When conducting chemical reactions in the lab or in industrial processes, it can be important to know whether a reaction has reached equilibrium. By measuring the reaction quotient, Q, of a chemical reaction and comparing it to the equilibrium constant, K, we can identify whether a reaction is at equilibrium. For the reaction aA+bB⇌cC+dD the reaction quotient, Q, is given by the expression Q=[C]c[D]d[A]a[B]b under any conditions. The value of Q is equal to K only at equilibrium.

Part B

The following reaction was carried out in a 2.50 L reaction vessel at 1100 K:

C(s)+H2O(g)⇌CO(g)+H2(g)

If during the course of the reaction, the vessel is found to contain 10.0 mol of C, 14.7 mol of H2O, 3.60 mol of CO, and 7.60 mol of H2, what is the reaction quotient Q?

Enter the reaction quotient numerically

Part C

The reaction

2CH4(g)⇌C2H2(g)+3H2(g)

has an equilibrium constant of K = 0.154.

If 6.30 mol of CH4, 4.50 mol of C2H2, and 11.35 mol of H2 are added to a reaction vessel with a volume of 6.00 L , what net reaction will occur?

The reaction

has an equilibrium constant of  = 0.154.

If 6.30  of , 4.50  of , and 11.35  of  are added to a reaction vessel with a volume of 6.00  , what net reaction will occur?

A chromatographic analysis is performed with a sample containing toluene and benzene. The column length was 10 m and the flow rate 30 mL/min.

Solute               tR                        W1/2

air                      1.5

benzene (A)     7.45                   1.05

toluene (B)       10.60                 1.45

What is the resolution for the two peaks?

The specific rate constant for the first-order decomposition of N2O5(g) to NO2(g) and O2(g) is 7.48×10−3s−1 at a given temperature.

A. Find the length of time required for the total pressure in a system containing N2O5 at an initial pressure of 0.100 atm to rise to 0.150 atm .

B. Find the length of time required for the total pressure in a system containing N2O5 at an initial pressure of 0.100 atm to rise to 0.200 atm .

C. Find the total pressure after 110 s of reaction.

(b) How does the conjugation of carbonyl group to carbon-carbon double bond affect the stretching frequency of carbonyl group?

3. (a) Give the definition and approximate range (in wavenumbers) of:

(a1) Diagnostic region

(a2) Fingerprint region

(b) Explain why it is unreliable to draw a conclusion about the presence of certain functional groups, based solely on the signals from the fingerprint region.

1) Order the following compounds in order of elution in gas chromatography.  Explain your reasoning. (Label “1^stEluted”, 2^ndEluted, and so on).  

Mobile Phase – Air (Flow Rate = 25 mL/min), Stationary Phase – poly(dimethylsiloxane),

Oven Temperature – 90 ^oC.

1-butanol, 1-pentanol, 1-hexanol, pentane

b) How would a gradient elution (55 ^oC – 120 ^oC) impact the chromatogram?

The tabulated data were collected for this reaction at a certain temperature: X2Y→2X+Y

What is the concentration of X after 11.5 hours?

If a 1.4-L reaction vessel initially contains 760 torr of N2O5 at 25 ∘C, what partial pressure of O2 is present in the vessel after 220 minutes?

Which of the following solutions is basic?

a. 0.10 M NH4ClO4

b. 0.10 M NH4Cl

c. 0.10 M NaNO3

d. 0.10 M NaI

e. 0.10 M NaCN

The correct answer is listed as E. Please explain why. I don't understand

Tro, Nivaldo 4th ed, Introductory Chemistry Chapter 16, Exercise 98 Please complete the math and solve Exercise 98:

98. Part a: Consider the unbalanced redox reaction:Cr₂ O₇^2-(aq) + Cu(s) →Cr3+(aq) + Cu²⁺

Balance the equation in acidic solution

Part b: and determine how much of a 0.850 M K₂ Cr₂ O₇ solution is required to completely dissolve 5.25 g of Cu.

In Slater's rules, electrons in the same group as your electron of interest count for 0.35 units of shielding. Explain how an electron in the same subshell is able to contribute to shielding. Aren't they the same distance from the nucleus?

The following data was collected in an experiment. The initial amount of hydrogen peroxide is 0.0035 mol. Find the rate constant

Moles of O2        Time ( in minutes)

0.0000482           0.008

0.0003544           1.798

0.0006828           4.027

0.0010133            7.758

What is the purpose and idea behind the experiment of conducting conductometricic titration of H2(SO4) and Ba(OH)2? what sources of error can be made and how these errors would affect the result?