52. A room contains 19.4 moles of oxygen gas. How many 0, molecules are present in this room? What is the mass of this amount of oxygen in grams?

Q: From the experimental point of view, highlight why the selenoxide pyrolysis for the dehydration of p...

A: The solution of the question is given below:

Q: 5. In the titration of a weak acid with a strong base, we used HIn/In to visualize the endpoint. HI...

A:

Q: Calculate the number of moles of KOH in 5.70 mL of a 0.310 M KOH solution. mol What is the pOH of th...

A: Molarity =moles ÷ volume(L)  pOH = -log [OH-] 

Q: The chemical formulae of some acids are listed in the first column of the table below, and in the se...

A:

Q: If a buffer solution is 0.560 M in a weak acid (Ka=5.3×10−6) and 0.120 M in its conjugate base, what...

A:

Q: =CH(CH2)¬CÓOH. 4. The structure of N-palmitoyl-D-sphingomyelin, a sphingolipid, is shown at the bott...

A: Structure of N-palmitoyl-spingolipid is a spingolipid that contains long chain carbon chain and it i...

Q: 2. The force constants for 'Hz and Brz are 575 and 246 Nm, respectively. Calculate the ratio of the ...

A: Given : Force constants for 1H2 = 575 N m-1 Force constants for 79Br2 = 246 N m-1 Temperature = 250 ...

Q: Calculate the pH of an aqueous solution at 25°C that is 0.29M in phenol (C,H;OH ). (K, for phenol = ...

A:

Q: 1.Do you expect HCI to have a higher frequency than HCI? No because 1HCI V has a greater reduced mas...

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any ...

Q: 2. Calculate the pH at 25 °C of a solution that is 0.3 M in NaH2AsO4 at 25 °C (Kal =5.8 x 10, Ka2 = ...

A:

Q: A chemistry student weighs out 0.0457 g of formic acid (HCHO,) into a 250. mL volumetric flask and d...

A: Given- Weight of formic acid =0.0457g Volume volumetric flask=250mL Concentration of NaOH =0.1100 M ...

Q: ections; make a reducing sugar -reducing sugar for the disaccha cate linkage. Name the disaccha

A:

Q: 400 mL sample of nitrogen gas is cooled from 77°C to 17°C in a container that can contract or expand...

A: Initial volume (V1) = 400 ml T1= 77°C = 77 + 273 = 350 K T2 = 17°C = 17 + 273 = 290 K

Q: Calculate the volume of 4.00 M K2SO4 that is needed to prepare 600 ml of a 0.2M solution of K2SO4

A: Given :-  initial concentration of K2SO4 solution = 4.00 M final concentration of K2SO4 solution = 0...

Q: structural formula for the more stable carbocation intermediate formed in the reaction shown. CH,CH2...

A: Given : We have to make final product for the given reaction.

Q: Identify the catalyst and the intermediate in the following reaction mechanism Cl + 03 > Clo + 02 CI...

A: A catalyst is consumed by a step but regenerated by a later step.  An intermediate is created by a s...

Q: Calculate the pH to the correct number of significant figures for solutions with the following conce...

A:

Q: Which of the following titrations is the MOST feasible? HI versus KOH NH4CI versus HCI acetic acid v...

A:

Q: CH,OH heat CH,OH heat Hint: remember that deprotonation of the intermediate that leads the most stab...

A:

Q: A chemist dissolves 728. mg of pure barium hydroxide in enough water to make up 140. mL of solution....

A: The concentration of any solution is defined as the ratio of no of moles of solute to that of volume...

Q: .Find out value of concentration of Ag+..?Given a solution 278.0 mg of AgBr is completely wasted in ...

A: Given: Mass of AgBr added = 278 mg = 0.278 g.                              (Since 1 g = 1000 mg) Con...

Q: Consider the dehydration of pentan-2-ol to produce pent-2-ene which involves heating. Determine the ...

A:

Q: Give the major products CH,Cl, Zn(Cu) H2, Pd/C CH;CO,H Bry/H,O HCI/H,O 2.

A:

Q: Calculate the total energy in J of an electron in a hydrogen atom in the n=3 state

A: Given-> n=3  

Q: For the following reaction, 12.0 grams of magnesium nitride are allowed to react with 17.5 grams of ...

A: mass of magnesium nitride =  12.0 grams mass of water = 17.5 grams

Q: What is the overall charge of Phosphotidylethanolamine at pH 7.4? Group of answer choices -2 -1 0...

A:   The phosphatidylethanolamine (PE) headgroup is a zwitterion, with a phosphate (negative charge) an...

Q: Predict the products of the reaction below. That is, complete the right-hand side of the chemical eq...

A:

Q: Refer to the hexagon pattern below. Assume that each edge of the hexagon measures 1 cm. Assume that ...

A: Perimeter of any geometrical figure is sum of the length of its sides . A hexagon has 6 sides and he...

Q: amount of heat lost with respect to time the composition with respect to time amount of heat lost wi...

A: Relationship generated in a cooling curve:

Q: Fill in the missing chemical formulae in the tables below. acid conjugate base H,0 ? H,PO4 H,O"

A:

Q: CH, (g) + H,0 (g) 3 H, (g) + CO (g) is brought to equilibrium at some steady temperature: when this...

A:

Q: Consider the following gas-phase reaction: 4 HCl(g) + O2(g) 2 Cl2(g) + 2 H2O(g) Using data from Appe...

A: Given reaction: 4 HCl (g) + O2(g) ------> 2 Cl2 (g) + 2 H2O( g)

Q: __H2O2 (aq) > __CuSO4 (S) +__H2O (I) > __NaCl (aq) + __KNO3 (aq) >   What are the reaction types?

A: Given :-  __H2O2 (aq) > __CuSO4 (S) +__H2O (I) > __NaCl (aq) + __KNO3 (aq) >  To identify...

Q: A student ran the following reaction in the laboratory at 245 K: 2NOBR(g) 2NO(g) + Br2(g) When she i...

A: We are required to find the equilibrium constant value for the reaction 

Q: Draw curved arrows to show electron reorganization for the reaction step below. Arrow-pushing Instru...

A:

Q: Br2(g) + OCl2(9)- BrOC1(g) + BrCl(g) Kp is equal to 54.45. A reaction vessel is filled with 2.6 atm ...

A: ★ Answer : Equilibrium pressure of BrOCl will be 2.29 atm. ★ Solution : 

Q: The following reaction is used in commercial cold packs. NH4NO3(s) + 25 kJ NH41+(aq) + NO31-(aq) Th...

A: The chemical reaction is as follows  NH4NO3 (s) + NH4-  +(aq) + NO31-(aq) The amount of heat which i...

Q: In pure substance, at constant volume, pressure and temperature will dictate whether a substance wil...

A: There are three phases of matter. The phase of matter can be interchanged by changing the temperatur...

Q: In a calorimeter, 150 mL of 0.5 mol/L barium chloride is mixed with 150 mL of 0.5 mol/L sodium sulfa...

A: The solution is given below - 

Q: __FeCl3 (aq) + __ KSCN (aq) > __Zn (S) + __HCl (aq) > __Cu (S) + __HCl (aq) > __H2O2 (aq) > __CuSO4 ...

A:

Q: The equilibrium constant, Kc, for the following reaction is 1.80x10-2 at 698 K. 2HI(g) H2(g) + I2(g)...

A:

Q: At 298K, the equilibrium constant for the following reaction is 4.20x10-7: H2CO3(aq) + H2O= H30*(aq)...

A: Required equation: H2CO3(aq) + 2H2O <-------> 2H3O+ + CO3 2-(aq) Rate constant=?

Q: The value of K c for the reaction A reversibly forming 2B is 2.21. At equilibrium   a. [A] = [B]/2....

A:

Q: 7.46 g of ammonium persulfate is dissolved in 112.0 mL of water. Initially the temperature of the wa...

A:

Q: Provide the structure of the product(s) with stereochemisty if appropriate. If multiple products ind...

A:

Q: For a particular redox reaction, So? is oxidized to SO and Fe+ is reduced to Fe2+. Complete and bala...

A: We have to predict the balance chemical reaction.

Q: Suppose that an initial volume (V1) of 1.360 mL of Nacl solution was diluted to V2=9.926 mL to obtai...

A: In the given question dilution of NaCl is taking place.  In such situations, the number of moles of ...

Q: A 100.0-mL aliquot of 0.100 M diprotic acid H2A (pK1 = 4.00, pk2 = 8.00) was titrated with 1.00 M Na...

A:

Q: 2NaHCO3(s) + 129kJ → Na2CO3(s) + H2(g) + CO2(g) 6) This equation indicates that AH is complete the r...

A: Given reaction: 2NaHCO3(s) + 129 kJ → Na2CO3(s) + H2(g) + CO2(g) We have to find the sign of ∆H. Als...

Q: Consider the following reaction where Ke = 7.00×10-5 at 673 K. NHẠI(s)=NH3(g) + HI(g) A reaction mix...

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.