Study Guides (238,252)
Canada (115,037)
Chemistry (130)
CHM135H1 (46)
all (8)

[Exam Tutorial] CHM139 Term Test 1 Fall 2011 Questions

4 Pages
Unlock Document

University of Toronto St. George

CHM139H (11F) TERM Test No.1 October 18, 2011 1. When an atom is represented by the symbols , what does A represent? a) A is the number of neutrons in the atom. b) A is the mass of the atom in atomic mass units. c) A is the total number of protons and neutrons in the atom. d) A is the number of protons in the atom e) A is none of these 2. What is the Si unit of density? a) g/m 3 3 b) g/cm c) g/mL d) kg/L 3 e) kg/m 3. Tale is a mineral that has many uses, ranging from cosmetics to high-tech ceramics. Elemental analysis shows that 14.35g of tale contains 7.264g of oxygen. Which of the following is the molecular formula of tale? a) Mg Si3O4(O10 2 b) Ca S3 O4(10) 2 c) Na S6 O4(10) 2 d) K Si O (OH) 6 4 10 2 4. Upon addition of 4.93g calcium hydroxide to 0.500L of a 0.0680M aqueous solution of H PO , 3 4 solid Ca3(PO 4 2nd water form. What is the theoretical yield of calcium phosphate in this reaction? a) 10.5g b) 5.27g c) 20.6g d) 26.8g e) 7.41g 5. A hydrogen atom in its ground state absorbs ultraviolet radiation having a frequency of 15 -1 2.94x10 s . What is the principal quantum number of the electron in the atom’s final state? a) n=3 b) n=4 c) n=5 d) n=7 e) n=9 6. Which element possesses all of the following characteristics i. The ground-state electron configuration of its atoms has two unpaired electrons; ii. Aqueous solution of its oxide are acidic; iii. Its atoms have a radius that is larger than that of krypton but smaller than that of xenon. a) Sn b) P c) Hf d) Se e) Sb 7. A sample of propane, C H , has a volume of 32.0L at 42 degree and 1.21 atm. What is its volume 3 3 at STP? a) 25.2L b) 30.6L c) 33.6L d) 37.0L e) 49.2L 8. Determine the root-mean-square speed of methane, CH (g), at 78 degree. 4 a) 23 m/s b) 348 m/s c) 550 m/s d) 667 m/s e) 739 m/s -3 9. Elemental rhodium is the world’s most expensive metal. It has density of 12.4g cm and adopts a face-centred cubic unit cell. Determine the volume of one unit cell of rhodium. a) 5.51x10 nm2 3 -15 3 b) 7.44x10 nm -6 3 c) 2.76x10 nm d) 8.48 nm 3 -2 3 e) 2.76x10 nm 10. Which of the following liquid substances would expect to have lowest surface tension? a) Pb b) CH -O-CH 3 3 c) HO-CH CH2-OH2 d) H O2 e) CH -3-OH 11. What is the mole fraction of NH in 3 16.0 mass % aqueous solution? a) 0.201 b) 0.01
More Less

Related notes for CHM135H1

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.