# determine the sign of delta S for the reaction C6H12O6 =

Get college assignment help at uniessay writers determine the sign of delta S for the reaction C6H12O6 = 3c2h4 3o2

## A calorimeter contains 19.0 mL of water at 12.5, ^{circ}C. When

A calorimeter contains 19.0 mL of water at 12.5, ^{circ}C. When 2.50 g of rm X (a substance with a molar mass of 59.0 g/mol) is added, it dissolves via the reaction rm X{(s)} H_2O{(l)} rightarrow X{(aq)} and the temperature of the solution increases to 28.5, ^{circ}C. Calculate the enthalpy change, Delta H, for this reaction per mole of rm X. Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 rm J/(g cdot {^circ C}) and 1.00 rm g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.

## is oxygen the most abundant element in the human body by

is oxygen the most abundant element in the human body by mass? is it principally found as O2 in the bloodstream?

## Arrange the compounds in order of decreasing vapor pressure, highest to

Arrange the compounds in order of decreasing vapor pressure, highest to lowest. NaCl, CH4 (methane), and CH3CH2OH (ethanol)

## is SO2 and NO2 isoelectronic

is SO2 and NO2 isoelectronic

## Indicate what is oxidized and reduced in the following equations, as

Indicate what is oxidized and reduced in the following equations, as well as the oxidizing agent and the reducing agent. 2Al 3Cl2 > 2AlCl3 8H ( ) MnO4- ( ) 5Fe2 > 5Fe3 ( ) Mn2 ( ) 4H2O FeS 3NO3- ( ) 4H > 3NO (SO4)2- ( ) Fe3 2H2O Zn 2HCl > ZnCl2 2H2

## 2{rm CH}_{3}{rm CO}_{2}{rm H}(aq) {rm Ba}({rm OH})_{2}(aq) rightarrow ({rm CH}_{3}{rm

2{rm CH}_{3}{rm CO}_{2}{rm H}(aq) {rm Ba}({rm OH})_{2}(aq) rightarrow ({rm CH}_{3}{rm CO}_{2})_{2}{rm Ba}(aq) 2{rm H}_{2}{rm O}(l).

## A 105 mL stock solution contains 4.1 M Na3PO4. When 28

A 105 mL stock solution contains 4.1 M Na3PO4. When 28 mL of the stock solution is diluted to 88 mL, how many moles of Na ions will be contained in the dilute solution?

## How long would it take for 1.50 mol of water at

How long would it take for 1.50 mol of water at 100.0 degrees Celcius to be converted completely into steam if heat were added at a constant rate of 19.0 J/s?

## A 20.0-mL sample of 0.120 M HONH2 (Kb = 9.1 x

A 20.0-mL sample of 0.120 M HONH2 (Kb = 9.1 x 10-9) is titrated with 0.100 M HCl(aq) solution. a) Draw the Lewis electron dot structure for HONH2 and determine the formal charge on each atom. b) Draw the Lewis electron dot structure for the conjugate acid of HONH2 which has the best formal charge on each atom and determine all formal charges. For each part below, identify the major species before any reaction occurs. Write appropriate reaction(s) with a table(s) and an equilibrium expression if appropriate. Show all work. Do not round intermediate results, but write the final pH with the correct number of significant figures. c. Calculate the initial pH. d. Calculate the pH after the addition of 10.0 mL of the HCl solution. e. Calculate the pH at the equivalence point. f. Calculate the pH 20.0 mL after the equivalence point.

## How many grams of dry NH4Cl need to be added to

Get college assignment help at uniessay writers How many grams of dry NH4Cl need to be added to 2.00 of a 0.100 M solution of ammonia, , to prepare a buffer solution that has a of 8.64? Ka for ammonia is 1.8*10^-5

## 400. MHz radio frequency energy. How much energy does this correspond

400. MHz radio frequency energy. How much energy does this correspond to in kilojoules per mole

## A 10.0 mL sample of vinegar, an aqueous solution of acetic

A 10.0 mL sample of vinegar, an aqueous solution of acetic acid (HC2H3O2), is titrated with 0.5062 M NaOH, and 16.58 mL is required to reach the equivalence point. What is the concentration of the acetic acid?

## Cr(CO)5 Considering only s donation from the CO ligands (i.e. treat

Cr(CO)5 Considering only s donation from the CO ligands (i.e. treat each CO molecule like a pz orbital (donating 2 electrons)), Give the symmetry labels for the LGOs (you do not need to draw the pictures, just determine the labels).

## Construct the MO diagram for Cr(CO)5, considering only s donation from

Construct the MO diagram for Cr(CO)5, considering only s donation from the CO ligands. Clearly label all atomic and molecular orbitals. Put in the correct number of electrons. What is the bond order? Is this consistent with the structure?

## A reaction flask initially contains 114 torr of CO and 262

A reaction flask initially contains 114 torr of CO and 262 torr of H2. The reaction is allowed to occur until the pressure stops changing, at which point the total pressure is 181 torr. Determine the percent yield for the reaction. Assume a constant temperature and that no other reactions occur other than the one indicated.

## How much heat is produced by the complete combustion of 256

How much heat is produced by the complete combustion of 256 of CH4

## Some velomobile seats have been designed to hold ice packs inside

Some velomobile seats have been designed to hold ice packs inside their cushions. If you started a ride with ice packs that held 1700 g of frozen water at 0 degrees C , and the temperature of the water at the end of the ride was 32 degrees C , how many calories of heat energy were absorbed?

## . Calculate the solubility product Ksp and solubility of AgBr at

. Calculate the solubility product Ksp and solubility of AgBr at 25ºC on the basis of standard electrode potentials.

## percent of oxygen to the nearest tenth in Ba(OH)2 x 8H2O

percent of oxygen to the nearest tenth in Ba(OH)2 x 8H2O

## (β) Τα ονόματα των ενώσεων AlCl3, PCl3 και CoCl3 είναι ………………………,

(β) Τα ονόματα των ενώσεων AlCl3, PCl3 και CoCl3 είναι ………………………, ………………………… και …………………………, αντίστοιχα. Δώστε μια σύντομη εξήγηση γιατί τα ονόματα διαφέρουν τόσο πολύ, παρόλο που και οι τρεις ενώσεις είναι της μορφής ΧCl3.

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