Get 2 days of premium access
Class Notes (1,000,000)
US (430,000)
LSU (7,000)
CHEM (100)
Hogan (1)
Lecture 1

CHEM 1201 Lecture Notes - Lecture 1: Scandium, Carbon Tetrachloride, Root Mean Square


Department
Chemistry
Course Code
CHEM 1201
Professor
Hogan
Lecture
1

This preview shows half of the first page. to view the full 3 pages of the document.
1. .0821 * L*atm/mol*kg * 1000ml/1L * 1cm^3/1L * 1^3m^3/100^3m^3 * 760 torr/1atm =
6.24*10^-2 Letter: C
2.
Na S O
Grams: 29 41 30
MM: 22.99 32.07 16
Mol: 1.261 1.278 1.875
Least mol: 1.261 1.261 1.261
Relative mol: 1 1.013 1.487
Na2 S2 O3
Letter: A
3. **know polyatomic ions** Sodium sulfate. M= mol/L… .5 mol Na2SO4 * 2 mol NA+/1
mol Na2SO4 * 1/1.3 L = .77 M Na+. Letter: E. .5 mol Na2SO4 * 1 mol SO4^2-/1 mol
Na2SO4 * 1/1.3 L = .38 M.
4. [Ar] 4s^2 3d^10 4p^1 Letter: B.
5. Ca+ (g) + e- : Letter: A. ** ionization is losing an electron**
6. **resonance means multiple equivalent structures** (drawn on back of Spring 2013)
Letter: B. ** can’t give third O a double bond because it’ll violate octet rule**
7. ** draw structures** (on back of Spring 2013) Letter: B.
8. **partial pressure= P=Cn** PV=nRT, P/n = C = RT/V: C= P total/n total. C= (.0821) (295
K)/.12 L = C= 201.8.
a. 15 g Xe * 1 mol/131.29 9 =.1143 mol Xe; P=Cn= (201.8) (.1143 mol Xe)= Pxe=
23.07 atm. Letter: B.
9. explained on back of Spring 2013. Letter: E.
10. M= mol solute/ L solute. M1= mol/L1. M2= mol/L2
a. M1L1=M2L2 (looking for M2)… M2= M1L1/L2… (plug it in) = 0.02016 M. Letter:
C.
11. ** reaction enthalpy** drawn on Spring 2013. [614 + 4(413)] + 3[495]  2[2(799)] +
2[2(463)] = 3751-5048= -1247. Letter: A.
12. P1V1/T1=P2V2/T2… V1=V2 so cancel V’s… P2=P1T2/T1= (2 atm)(306 K)/(293 K) = 2.089.
Letter: D.
13. Letter: E. ionic is metal+nonmetal, molecular is nonmetal+nonmetal.
14. combustion reaction. **balance elements that appear on multiple molecules LAST
(O)** 1 C4H10O + 6 O2  4 CO2 + 5 H2O. Letter: D.
15. **titration unit conversions w substance change** .0247 L HBr * 9.25*10^-5/1 L * 1
mol Y(OH)3/3 mol HBr * 1/.55 L = 1.39 * 10^-6 M. letter: D.
a. OH to H ratio.
16. Letter: B.
17.
NaCl MgCl2 MgBr2 NaBr
[+ and -] 1 2 2 1
Sum of shells 2+3=5 2+3=5 2+4=6 2+4=6
order 2 4 3 1
find more resources at oneclass.com
find more resources at oneclass.com
You're Reading a Preview

Unlock to view full version