nood5

What hybrid orbitals would be expected for the central atom in each of the following molecules or ions?

a. SI₂

b. HSiO_{3 -}

c. BeF₂

d. ClO₃ -

Describe the structural composition of water using valence bond theory 

A 2kg Cylinder has a radius of 20cm. It rolls without slippingalong a horizontal surface at a velocity of 12m/s.
A) What is the translational Kinetic Energy?
B) What is the Rotational Kinetic Energy?
C) What is the total Kinetic Energy?

I have the answers: a) 144J, B) 72J, C) 216J, but I do notunderstand how to get the answers. Please help, I need to see thework so I understand this. Thanks in advance.

A 1.07 kg rolling hoop with a radius of 10.0 \rm cm rolls without slipping. If the linear speed of the disk is 1.27 m/s, find the translational kinetic energy, rotational kinetic energy, and the total kinetic energy of the rolling hoop.

a body rolls over a horizontal surface without slipping .write translational K.E show that total kinetic energy(K.E)of the body is e(1+K2/R2) where K is radius of gyration & R radius of the body.using above relation find the total K.E of a circular disc

6. What was the main idea expressed in John Locke's two Treatises of Government?

7 What is the purpose of government according to John Lockes two Treatises of Government?

How to calculate K.E 

1. Which form of electromagnetic radiation has the longest wavelengths?

A) gamma rays

B) microwaves

C) radio waves

D) infrared radiation

E) x-rays

2. Which of the following frequencies corresponds to light with the longest wavelength?

A) 3.00 ´ 1013 s–1

B) 4.12 ´ 105 s–1

C) 8.50 ´ 1020 s–1

D) 9.12 ´ 1012 s–1

E) 3.20 ´ 109 s–1

3. What is the wavelength of a photon of red light (in nm) whose frequency is 4.55 ´ 1014 Hz?

A) 659 nm

B) 1.52 ´ 106 nm

C) 152 nm

D) 455 nm

E) none of these

4. How many electrons can be contained in all of the orbitals with n = 4?

A) 2

B) 8

C) 10

D) 18

E) 32

5. The electron configuration for the barium atom is:

A) 1s22s22p63s23p64s23d10

B) [Xe]6s2

C) 1s22s22p63s23p64s1

D) 1s22s22p63s23p64s2

E) none of these

6. The electron configuration for the carbon atom is:

A) 1s22s22p2

B) [He]2s4

C) [Ne]2s22p2

D) 1s22p4

E) none of these

7. Which of the following processes represents the ionization energy of bromine?

A) Br(s) mc007-1.jpg Br+(g) + e–

B) Br(l) mc007-2.jpg Br+(g) + e–

C) Br(g) mc007-3.jpg Br+(g) + e–

D) Br(s) mc007-4.jpg Br+(s) + e–

E) Br2(g) mc007-5.jpg Br2+(g) + e–

8. Order the elements S, Cl, and F in terms of increasing ionization energy.

A) S, Cl, F

B) Cl, F, S

C) F, S, Cl

D) F, Cl, S

E) S, F, Cl

9. Atoms having equal or nearly equal electronegativity’s are expected to form

A) no bonds

B) polar covalent bonds

C) nonpolar covalent bonds

D) ionic bonds

E) covalent bonds

10. Which of the following bonds is least polar?

A) C—O

B) H—C

C) S—Cl

D) Br—Br

E) They are all nonpolar.

11. In which case is the bond polarity incorrect?

A) d+H–Fd–

B) d+K–Od–

C) d+Mg–Hd–

D) d+Cl–Id–

E) d+Si–Sd–

12. Which of these is an isoelectronic series?

A) Na+, K+, Rb+, Cs+

B) K+, Ca2+, Ar, S2–

C) Na+, Mg2+, S2–, Cl–

D) Li, Be, B, C

E) none of these (A-D)

13. Which of the following has the smallest radius?

A) F–

B) Ne

C) O2–

D) Mg2+

E) Na+

14. Calculate the lattice energy for LiCl(s) given the following:

sublimation energy for Li(s)

+166 kJ/mol

DHf for Cl(g)

+119 kJ/mol

first ionization energy of Li(g)

+520. kJ/mol

electron affinity of Cl(g)

–349 kJ/mol

enthalpy of formation of LiCl(s)

–409 kJ/mol

A) 47 kJ/mol

B) 171 kJ/mol

C) –580 kJ/mol

D) –865 kJ/mol

E) none of these

Using the following electronegativity values:

C 2.5 Cl 3.0

H 2.1 O 3.5

select from the following group the molecule that fits the given statement:

a) CH3CHO

b) CO2

c) CH3Cl

d) C2H6

e) none

15. This molecule shows the smallest number of lone pairs in its Lewis structure.

A) CH3CHO

B) CO2

C) CH3Cl

D) C2H6

E) All have zero lone pairs.

16. Which of the following has an incomplete octet in its Lewis structure?

A) SO2

B) ICl

C) CO2

D) F2

E) NO

17. Which of the following exhibits resonance?

A) NH3

B) PCl5

C) H2O

D) O3

E) At least two of the molecules (A-D) exhibit resonance.

18. In the molecule C2H4 the valence orbitals of the carbon atoms are assumed to be

A) not hybridized

B) sp hybridized

C) sp2 hybridized

D) sp3 hybridized

E) dsp hybridized

19. Atoms that are sp2 hybridized form ____ pi bond(s).

A) 0

B) 1

C) 2

D) 3

E) 4

20. Consider the molecule:

mc020-1.jpg

Specify the hybridization of each carbon atom.

C-1 C-2 C-3 C-4 C-5

A) sp2 sp2 sp2 sp3 sp

B) sp2 sp2 sp2 sp3 sp3

C) sp2 sp2 sp3 sp3 sp2

D) sp2 sp2 sp3 sp3 sp3

E) sp2 sp sp sp2 sp

1) The average bond energy of a C—H bond is:

a) 99 b) 83 c) 111 d) 93 e) 36 f) 104 g) 86 h) 176

2) The average bond energy of a C—O bond is:

a) 99 b) 83 c) 111 d) 93 e) 36 f) 104 g) 86 h) 176

3) The average bond energy of a C—C bond is:

a) 99 b) 83 c) 111 d) 93 e) 36 f) 104 g) 86 h) 176

4) The bond energy of a H—H bond is:

a) 99 b) 83 c) 111 d) 93 e) 36 f) 104 g) 86 h) 176

5) When in an organic structure, electrons can be delocalized,then:

a) the compound will be more stable than expected based uponvalence bond structure:

b) the compound will be less stable than expected based uponvalence bond structure:

c) depends upon the compound

d) have no idea what you are talking about (wrong answer, reviewthe podcasts)

e) why would a premed care? (wrong answer, review thepodcasts)

f) it depends upon who is teaching Ochem (wrong answer, reviewthe podcasts)

g) only if the number of electrons is equal to 2n + 2, where nis an integer

h) none of the above.

could someone tell me what is the 4.184 factor being used in this solution? https://imgur.com/a/cFZdR

I got the right answer by consider the bond energy fro the C-C bonds = 83 and for the C-H bonds = 99 only.

Could someone tell me if the answer is A,B,C or D? (I got D but I’m not sure)

Could someone tell me the order of these

Could someone tell me if I put these in the right order

Could someone check to see if this is right for me

Can someone check if this is right for me please

Can someone help me with this, i think it’s A but I’m not sure

I keep getting ALMOST the right answer, but it doesn't seem to be asig fig issue.

Here's the question: Calculate the pH of 0.105 M CCl3COOH(pKa=0.52).

The text says the answer is 1.08. I keep getting 1.05. I don'tthink it's a rounding issue.

So guys I actually did this problem, but Im having a hard time withthe final calculations. Id appreciate your help.

(My teacher has the answer down to be "2.52 x 10 ^-3 M" but thatsnot what Im getting)

How do you solve:
[square root sign] 4.13 x10^-2 = [square root sign all over](x)(x)/(.0124)^2

Please help!!

I dont have a problem that I need help with. I would just like some opinions on a situation I am having with my teacher. When I do a problem I am getting the right answer and I am setting it up right but my teacher marks it wrong because I am not putting the units the way he wants it in my calculations. For example I just put 4.70 atm but he marks it wrong because he wants it l/atm or I put 258k but he wants it mol/k. I know what I am doing. I think it is very unfair. I notice when I ask for a problem on this site and people respond they dont even mark the units. I think this is so petty. What does everyone think?

On a hot summer day, the temperature of air in Arizona reaches 101°F. What is the speed of sound in air at this temperature? (The speed of sound at 0°C is 331 m/s. Use the conversion 0°C = 273 K as necessary.)
 m/s

Two capacitors, one that has a capacitance of 6 µF and one that has a capacitance of 18 µF are first discharged and then are connected in series. The series combination is then connected across the terminals of a 12-V battery. Next, they are carefully disconnected so that they are not discharged and they are then reconnected to each other--positive plate to positive plate and negative plate to negative plate.

 A 15 mF capacitor and a 25 mF capacitor are connected in parallel, and charged to a potential difference of 60V. How much energy is then stored in this capacitor combination?

A parallel-plate capacitor has 1.00 cm² plates that are separated by 6.00 mm with air between them. If a 12.0 V battery is connected to this capacitor, how much energy does it store?

A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 2.55 μC.

(a) What is the potential difference between the plates?
(b) If the charge is kept constant, what will be the potential difference between the plates if the separation is doubled?
(c) How much work is required to double the separation?

 A parallel-plate capacitor has a capacitance of c₁ = 4.5 μF when filled with air and c₂ = 41 μF when filled with a dielecric oil at potential difference of 12V. Consider the vacuum permittivity to be μ0 = 8.85 × 10^-12 C²/Nm².

How much much charge Δq  in C does the capacitor hold when filled with oil relative to when it's filled with air?

When it comes to phonology, many language universals are reflected in child language production. Think of and describe two ways in which child language production mirrors language universals. Your description of each should make reference to a specific phonological process exhibited by children and compare it to a specific corresponding implicational universal or universal tendency.

 Air breaks down and conducts charge as a spark if the electric field magnitude exceeds   (a) Determine the maximum charge Qmax that can be stored on an air-filled parallel-plate capacitor with a plate area of  (b)   air-filled parallelplate capacitor stores charge Qmax. Find the potential difference across its plates. 

An ice chest at a beach party contains 12 cans of soda at 4°C. Each can of soda has a mass of 0.3 kg and a specific heat capacity of 3500J/(kg · C°). Someone adds a 6.4-kg watermelon at 29° C to the chest. The specific heat capacity of watermelon is nearly the same as that of water. Ignore the specific heat capacity of the chest and determine the final temperature T of the soda and watermelon.