Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 14. Which of the following compounds would you expect to be ionic? A) SF6 B) H2O C) H2O2 D) CaO 15. Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g) + 3H2 (g) à 2NH3 (g) A 9.3-g sample of H2 requires ____________ g of N2 for a complete reaction. A) 43 B) 1.3 x 102 C) 3.9 x 102 D) 4.6 16. What is the frequency of light (s-1) that has a wavelength of 1.23 x 10-6 cm? A) 3.69 B) 2.44 x 1016 C) 4.10 x 10-17 D) 9.62 x 1012 17. Which sketch represents an orbital with the quantum numbers n = 3, l = 1, ml = 0? A) B) C) D) 18. What color of visible light has the longest wavelength? A) blue B) violet C) red D) yellow 19. According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both the position and the __________ of an electron. A) mass B) color C) momentum D) shape 20. The wavelength of a photon that has an energy of 5.25 x 10-19 J is ___________ m. A) 3.79 x 10-7 B) 2.64 x 106 C) 2.38 x 1023 D) 3.79 x 107 21. There are ___________ orbitals in the second shell. A) 2 B) 4 C) 9 D) 18

What is an ionic compound and how is it formed?

Ionic compounds are formed through the transfer of electrons between atoms, typically between a metal and a nonmetal, creating ions that are attracted to each other due to opposite charges.

What type of compound is CaO (Calcium oxide)?

CaO is an ionic compound because it forms from the transfer of electrons between calcium (a metal) and oxygen (a nonmetal).

What is the relationship between reactants and products in stoichiometry?

Stoichiometry involves calculating the quantitative relationships of the reactants and products in chemical reactions.

Given the balanced equation N2 + 3H2 → 2NH3, how many moles of N2 are needed for 4.6 moles of H2?

1.53 moles of N2 are needed for 4.6 moles of H2.

What is the speed of light in cm/s?

The speed of light is approximately 3.00 x 10^{10} cm/s.

How do you calculate frequency (ν) from wavelength (λ)?

Frequency (ν) can be calculated using the equation ν = c/λ, where c is the speed of light.

What shape does a p orbital have?

A p orbital has a dumbbell shape.

What color represents the longest wavelength in the visible light spectrum?

Red light has the longest wavelength in the visible spectrum.

What does the Heisenberg Uncertainty Principle state?

The Heisenberg Uncertainty Principle states that it is impossible to accurately determine both the position and momentum of a particle simultaneously.

What equation relates the energy of a photon to its wavelength?

The energy of a photon is given by the equation E = hc/λ.

How many orbitals are present in the second electron shell?

There are 4 orbitals in the second electron shell (1 s orbital and 3 p orbitals).