Assuming that you start with 2.00 g of sodium benzoate and 5 mL of 3 M HCl, how many molar equivalents of HCl are you using? Use two decimal places.

22) the diffusion coefficient of carbon FCC iron is lower than BCC iron because

a) the temperature is higher for FCC

b) FCC has a higher packing factor

c) FCC is more cubic

d) Carbon is substitional in FCC

Although neither the american chemical society (ACS) nor the international union of pure and applied chemistry (IUPAC) have official definitions of "Soluble","slightly soluble".etc. The US pharmacopeia does, and these are given in the table below. make another table but this time use "grams of solute per 100 mL of solvent " For example an entry might be something like "From 0.01 g to 0.1 g" indicating that that much can be dissolved in 100 mL of water

Table 1. Solubility designations as listed in the USP

Description                                         mL of solvent required for one gram of solute

Very soluble                                                <1

freely soluble                                            from 1 to 10

soluble                                                       from 10 to 30

sparingly sluble                                        from 30 -100

slightly soluble                                         from 100 to 1,000

very slight soluble                                   from 1,000 to 10,000

pracically insoluble                                   >10,000

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.100 M HClO(aq) with 0.100 M KOH(aq). The ionization constant for HClO can be found here.

(a) before addition of any KOH (b) after addition of 25.0 mL of KOH (c) after addition of 30.0 mL of KOH (d) after addition of 50.0 mL of KOH (e) after addition of 60.0 mL of KOH

which of the following molecules exist in an ionized form at ph 9? use ka/kb table. there are 2 answers.

aniline, hypochlorus acid, phenol, ethylamine

A furnace is burning natural gas (90% by mol methane and the balance ethane) at 20 Celsius degree and 1 atm with 25% excess air at 150 Celsius degree and 1.1 atm. The product gases are at 600 Celsius degree and 1 atm. 95% of each fuel gas forms CO2 while the balance forms CO. a) What is the ratio of air supply volume to fuel volume? b) What is the composition of the product gas mixture on a mol% basis? c) What is the ratio of exhaust gas volume to fuel volume?

Which of the following transitions in the Bohr hydrogen atom results in the emission of the shortest wavelength photon.

a. n = 2 → n = 5

b. n = 5 → n = 2

c. n = 6 → n = 3

d. n = 3 → n = 6

e. n = 4 → n = 1

Pick the stronger base from each of the following pairs.

Cl− or ClO−

H2O or NO3−

NO2− or CN−

Find the percent ionization of a 0.250 M solution of HC2H3O2

Gaseous ethane (CH3CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O). Suppose 26. g of ethane is mixed with 180. g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

titration of 25.00 ml of 0.100M CH3COOH with 0.100 M NaOH (weak acid, strong base)

a) calculate the initial pH ( kb = 1.8 x10 ^-5)

b) why is pH > 7 at the equivalence point?

c) calculate the pH at the equivalence point

At a certain temperature, the equilibrium constant for the following chemical equation is 2.50.

SO2(g) + NO2(g)<---> SO3(g) + NO(g)

At this temperature, calculate the number of moles of NO2(g) that must be added to 2.86 mol of SO2(g) in order to form 1.30 mol of SO3(g) at equilibrium.

Solve for the number of moles for NO2

I will rate, please answer.

The density of an aqueous solution of C2H602(l) is 1.48 g/ml. The molarity of the solution is 2.84. Find the freezing point of the solution and the vapor pressure of the solution at 25 C. (Kf of H20 = 1.86 c/m), VP of H20 at 25 C = 18.4 torr)

When you add 0.330 g of sodium metal to an excess of hydrochloric acid, you find that 3430 J of heat are produced. What is the enthalpy of the reaction as written below?

2Na(s) + 2HCl(aq) ------- 2NaCl(aq) + H2 (g)

Enthalpy of reaction:

Two 20.0-g ice cubes at –21.0 °C are placed into 225 g of water at 25.0 °C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts.

Indicate the force that is the predominant reason that one material in each pair in the question above has a higher boiling point than the other. (This would be the force that is present in one material but not the other, or that is greater in one material than the other.) (either a. b or c)

1a) NH₃ or PH₃

(a)dipolar forces

(b)dispersion forces

(c)hydrogen bonding

1b) C₂H ₅OH or H₃C-O-CH₃

(a)dipolar forces

(b)dispersion forces   

(c)hydrogen bonding

1c) C₄H₈ or C₁₀H₂₀

(a)dipolar forces

(b)dispersion forces   

(c)hydrogen bonding

1d) H₂S or F₂

(a)dipolar forces

(b)dispersion forces   

(c)hydrogen bonding