65. Because carbon and silicon are both elements in group 14 on the periodic table, we expect them to react with other elements in similar ways. To some extent, then do, but in some cases, carbon and silicon compounds that seem to have analogous structures have very different chemical characteristics. For example, carbon tetrachloride, CCl₄ is very stable in the presence of water, but silicon tetrachloride, CCl₄, reacts quickly with water. The unbalanced equation for this reaction is

                SiCl₄ + H₂O à Si(OH)₄ + HCl

1. Balance this equation.
2. Write a conversion factor that could be used to convert between moles of SiCl₄ and moles of H₂O
3. How many moles of SiCl₄ react with 24 moles of water?
4. Write a conversion factor that could be used to convert between moles of Si(OH)₄ and moles of water.
5. How many moles of Si(OH)₄ form when 4.01 moles of H₂O react with an excess of SiCl₄?

"Starting with a 1.35 M HCl stock solution, five standard solutions are prepared by sequentially diluting 5.00 mL of each solution to 100.0 mL. What is the concentration of the final solution?"

The equilibrium constant, K, for the following reaction is 1.20×10-2 at 500 K. PCl5(g) PCl3(g) + Cl2(g) An equilibrium mixture of the three gases in a 1.00 L flask at 500 K contains 0.200 M PCl5, 4.90×10-2 M PCl3 and 4.90×10-2 M Cl2. What will be the concentrations of the three gases once equilibrium has been reestablished, if 3.12×10-2 mol of Cl2(g) is added to the flask?

[PCl5] =

[PCl3] =

[Cl2] =  

The chemical reaction involved in the oxidation of hydroquinone by hydrogen peroxide to produce quinone and water is: C6H4 (OH)2 (aq) + H2O2 (aq) = C6H4O2 (aq) + 2 H20 (l). Calculate delta H for the above reaction from the following data. C6H4 (OH)2 (aq) = C6H4O2 (aq) + H2 (g) delta H = 177.4 kJ; H2(g) + O2 (g) = H2O2 (aq) delta H = -191.2 kJ; H2 (g) = 1/2 O2 (g) = H2O (g) delta H = -241.8 kJ; H2O (g) = H2O (l) delta H = -43.8 kJ. The enthapy for the oxidation of hydroquinone by hydrogen peroxide to produce water and quinone is _________kJ

Based on their position in the peeriodic table, which atom would you predict to form a compound with one chlorine atom and 2 bromine atoms respectively? a. potassium, magnesium b. carbon, lithium c. boron, sodium d. calcium, carbon e. aluminum, aluminum

General Chemistry

please write it by your own don't copy from the internet send it by email [email protected]

Analysis Based: [Any 2 in less than 200 words]

1. The sun emits a lot of heat and light, what kind of reaction happens in the sun.

2. List out 5 activities/phenomenon where you see the influence of chemistry your daily life

3. Has Chemistry benefitted Human Life? Support your view with 2 important incidents from history.

4. Research and write the incident/scientist [less than 200 words] that led to the discovery of

 Pencillin

 Radioactivity

 Insulin

Arrange the following gases in order of increasing rate of effusion at 298 deg K. (Hint:

Look up the correct chemical formulas of these.)   

a. Argon       b. Hydrogen bromide         c . Ethane (formula?)       d. Carbon monoxide

__________ ___________ ____________ _____________ Slowest      

2- a. Under what two circumstances is the ideal gas equation not obeyed by ordinary gases?

b. What is the importance of van der Waals equation?   

In a laboratory experiment, 2.0 g of aqueous lead (II) nitrate was mixed with 2.0 g of aqueous sodium chloride. Upon completion of the experiment, 0.65 g of lead (II) chloride were obtained.

a) Provide the balanced equation.

b) What is the limiting reactant?

c) What is the theoretical yield?

d) What is the percent yield?

4. which of the following is most likely to exhibit covalent bonding

a. MgCl2 b. NaCl c. OCs2 d. SO2 e. LiF

it is either c or d not sure which is most covalent

Is the world CHIRAL ?

-rationalize your idea

During an adiabatic expansion of an ideal gas, which stays constant?

a) U

b) H

c) S

Internal Energy stays constant?

Which one of the following is true?

a) The entropy of an isolated system can only stay constant or increase during a process

b) We can construct a heat engine that extracts heat from a hot reservoir and delivers an equal amount of work

c) We can construct a refrigerator whose sole effect is to transfer heat from a cooler object to a hotter one

Entropy of isolated system stays constant?

Thank you!

Experiment shows that the reaction 6I−(aq) + BrO3 −(aq) + 6H+(aq) ⟶ 3I2 (aq) + Br−(aq) + 3H2O(l) obeys this rate law: rate = k[I- ][BrO3 ][H+] 2 .

(a) What is the reaction order in each reactant and the overall reaction order?

(b)By what factor does the rate change if [I−] and [BrO3 −] are tripled and [H+] is doubled?

The second order reaction 2A₂B_{3 ----->} A₄B₆ has a rate constant, k, of 7.35 x 10^-3M^-1S-¹ at a certain temperature. If [A₂B₃]₀ = 1.32M, how much time (s) does it take to reduce the concentration to 27% of the original? (please explain)

The decomposition of hydrogen peroxide H₂O₂(l) ---> H₂(g) + O₂(g) has a rate constant of 1.06 x 10-3min^-1. how long (min) will it take for the concentration of H2O2 to decompose by 60%? (please explain)

the decomposition of M3X2(aq) <--> 3M(s) + X2(g) has an activation energy of 15- kJ/mol and (delta)H_rxn = -72kJ/mol, under specified conditions. what is the activation energy (kJ/mol) for the reverse reaction?

the equilibriium constant, Kp has a value of 6.5x10^-4 at 308 K for the reaction of nitrogen monoxide with chlorine.     2NO(g)+Cl₂(g) <---> 2NOCl(g)... at 308K what is the value of Kc? (please explain)