Chemistry 1 18. Which of the following is a nonpolar molecule with polar bonds?

Question

Chemistry 1
18. Which of the following is a nonpolar molecule with polar bonds? a. son b. H d. CO2 e, NC1, c. H2O 19. Calculate the energy change when an electron moves from n-1 to n-4 in the hydrogen atom. a. -2.04 x 10 J b. -1.63 x 10 "J c, 2.04 x 10 J e 3.49 x 10 "J d. 1.36 x 10 19 J 20. How many moles of silver (Ag are there in 5.0 g of AgNOs? The molar mass of AgNOs- 170 g/mo d. 0.00112 e 34.0 b. 0.029c. 8.49 a, 5.00 21. Which of following are the correct ions in (NH,OSO42 c. NHA and so a. N', H", s and o b. NH22 and H2so. d. NHA and so. e.NH. and so, 22. What is the ground-state electron configuration for Mg2+? a. 1s22s22p63s23p6b. 1s22s22p63s2 e. 1s22s22p63s23p2 23. Which reaction below represents the second ionization of Sr? sr (g) Srt(g) e- c. b. Sr(g) Sr2 +(g) e. Sr (g) e Sr(g) a. srt(g) e- d. Sr2+(g) e- Sr (g) numbers" is known as the 24. "No two electrons in an atom can have the same four quantum uncertainty principle b. Hund's rule. c. Heisenberg a. Aufbau principle d. Pauli exclusion principle symbol) for Cl? 25. Which of the following represent the Lewis structure (Lewis d. Cl. 26. What is the capacity electrons in n 5, l 3? total of 32

Explanation / Answer

Answered first four problems, post one more question to get the remaining answers

18) The correct answer is Option D (CO2)

Since C=O is a polar bond but the net dipole moment will be zero

19)

Energy Change = E4 - E1

=> -13.6eV/4^2 + 13.6eV/1^2

=> 12.75 eV

Energy in Joules = 12.75 * 1.6 * 10^(-19) J = 2.04 * 10^(-18)J

Correct answer is Option C

20)

Number of moles = Mass/molar mass

=> 5/170

=>0.0294 mole

Hence the correct answer is Option B

21) NH4+ and SO4(2-) are the correct options

hence correct answer is Option C

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