Recall that an emission transition involves a jump from an upper energy level down to a lower energy level. With this in mind, what quantum number do lines of the Lyman series have in common? The Balmer series? The Paschen series? How can we designate a set of lines as a “series”?

Approximately 240 mL/min of CO2 is exhaled by an average adult at rest. Assuming a temperature of 37.0 degrees Celcius and 1.00 atm pressure:

A) How many moles of CO2 is this?

B) How many grams of CO2 is this?

**Please show full work so I can follow the solution for further understanding**

The pH of a 0.77M solution of boric acid H3BO3 is measured to be 4.68. Calculate the acid dissociation constant Ka of boric acid. Be sure your answer has the correct number of significant digits.

Predict the major products from the treatment of acetone with the following:

(a) [H+], NH3, (-H2O)

(b) [H+], CH3NH2, (-H2O)

(c) [H+], excess EtOH, (-H2O)

(d) [H+], (CH3)2NH, (-H2O)

(e) [H+], NH2NH2, (-H2O)

(f) [H+], NH2OH, (-H2O)

(g) NaBH4, MeOH

(h) RCO3H

(i) HCN, KCN

(j) EtMgBr followed by H2O

(k) (C6H5)3P=CHCH2CH3

(l) LiAlH4 followed by H2O

PLEASE SHOW ALL STEPS. THANK YOU.

Calculate the molar concentration of OH? ions in a 0.570M  solution of hypobromite ion (BrO?; Kb=4.0

You have a 40mM stock of glucose, a 250mM stock of asparagine, and a 0.250M stock of  NaH₂PO₄, and magnesium chloride powder (solid form) , MgCl₂(Formula Weight; 95.21g/mole).  How would you prepare (be specific) 500mL of a solution that contains 0.005M glucose, 25mM asparagine, 15mM NaH₂PO₄and 250mM MgCl₂ ?

Magnesium metal burns in oxygen to form magnesium oxide, MgOMgO.

2Mg+O2→2MgO

1.) How many grams of oxygen are needed to react with 28.0 gg of MgMg?

2.) How many grams of MgOMgO will result?

3.) How many grams of MgMg are needed to react with 28.0 gg of O2O2?

4.) How many grams of MgOMgO will result?

What is the difference between a transmutation reaction and a radioactive decay reaction?

What are the values of  q, w, ΔU, ΔH, ΔS, ΔS_surr, and ΔS_univ for the following constant pressure process for a system containing 0.137 moles of CH₃OH ?

CH₃OH(g, 122.0 ºC, 1.00 atm)  ⟶  CH₃OH(l, 29.0 ºC, 1.00 atm)

Assume that CH₃OH(g) behaves as an ideal gas and the volume of CH₃OH(l) is much less than that of CH₃OH(g). Also, assume that the temperature of the surroundings is 29.0 ºC.

Data:

Molar heat capacity for CH₃OH(g), C_p,m = 44.1 J K⁻¹ mol⁻¹

Molar heat capacity for CH₃OH(l), C_p,m = 81.1 J K⁻¹ mol⁻¹

Enthalpy of vaporization, Δ_vapH = 35.2 kJ mol⁻¹ at 64.7 ºC and 1.00 atm

Enter answers that are accurate to three (3) or more significant figures.

q = ____________ J

w = ____________ J

ΔU = ____________ J

ΔH = ____________ J

ΔS = ____________ J K⁻¹

ΔS_surr = ____________ J K⁻¹

ΔS_univ = ____________ J K⁻¹

Consider the titration of a 25.0 ml sample of 0.175 M CH₃NH₂ with 0.150 HBr. Determine each quantity.

a) The volume of added acid required to reach the equivalence point.

b) The ph at one-half the equivalence point.

c) The ph at the equivalent point.

d) The ph after adding 5.0 ml of acid beyond the equivalent point.

Consider the reaction 2 NH₃ (g) ? N₂ (g) + 3 H₂ (g). Suppose 6 moles of pure ammonia are placed in a 1.0 liter flask and allowed to reach equilibrium. If X represents the concentration (in M) of nitrogen present in the system once equilibrium is reached, which of the following will represent the concentration of ammonia in M? Show work

A) 6

In each pair complete the following 3 parts;

      i) identify ALL the intermolecular forces present in each (ion-dipole; H-bonding; diploe-dipole; dispersion)

      ii) circle the substance in each pair with the higher boiling point

     iii) explain your choice for “ii”

                                                                                                                                                           in aqueous solution

a) CH₃Bror   CH₃F                     b) CH₃CH₂CH₂OH   or   CH₃CH₂OCH₃                     c) MgCl₂   or   SrCl₂  

i:                                                                 i:                                                                               i:

iii:                                                            iii:                                                                                iii:

A chemical equation is an expression that uses chemical formulas and other symbols to illustrate what ________ constitute the starting materials in a reaction and what ________ are formed.

True or false

1. Heat of reactions are always equal to DH

2. NaOH is hygroscopic substance, slowness in weighing and dissolution in water will result in an increase in the calculated heat of solution

3. In the heat of solution experiment changing NaOH to KOH will change the DH value

4. Heat of solution is always negative (exothermic)

Given the following data and using Hess’ Law, Calculate change in Enthalpy for the reaction Overall reaction : NO(g) + O (g) ------? NO2(g)

2O3(g) ------? 3O2(g) ?H = - 427 kJ

O2(g) ------? 2O(g) ?H = 495 kJ

NO(g) + O3 (g) ------? NO2 (g) + O2 (g) ?H = - 199 kJ