Practice midterm 1 spring 2008

Practice midterm 1 spring 2008 - I Chemistry 142A Seat(1...

Info icon This preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: I Chemistry 142A - Seat (1) Name ' V , Spring Quarter, 2008 — EXAM #1 ‘ Lab/Quiz Section (1) _ April, 25, 2008 VERSION A Lab/Quiz TA - ‘ ' (1) ,_. “W— 1. (8) Give the correct chemical name or chemical formula for each of the following Chemical compounds: (a) SHBI'4 - i (b) Calcium Nitride . (C) KOH M (d) Lithium _Iodite‘ A . ' ' _ (e) KHSOa M (f) Ammonium Dichromate m (g) H2304 '1 " f (h) Trinitrogen Pentoxide 2. (10) _ Short Answer Questions ' '(a) Give the chemical formulas of two polYatomic anions that contain sulfur. (b) What is the chemical formula of a 3' anion that contains phosphorous? Answer (c) The elements calcium ancl barium belong to which family or group of elements? Answer (d)‘ What would be the approximate molar mass of deutrated methane (CD4)? Answer (e) What is the molar mass of molecular sulfur? Answer I Chem 142A -— Spr. Qtr., 2008 —— Exam #1 7 v Page 2 3. (24) Complete and balance the following chemical and nuclear equations. Indicate the phases of the products in the Chemical equations (3, l, g, aq).v If no reaction occurs write N.R. (no reaction); I (a) __ Ca(s) + __ H200) -> (b) fgSr —> ,6". +____+ . (c)____lc5H,2(1) + 02 A I (d) 29325U+01n —> gBr+ +35n+Energy (e) 802(g) + H200) ‘—> . (f) 'ééDy ——> EC + _____+ Energy ~ (g) __‘Ba(0H)2(aq> + ._; HBr<aq) '—> (h) €sz -—> B“ + fi+ (i) __ Sc(s) + _ c12(g) X (i) ___ K(S) + ‘ 02(8) —’ (k) Ar(g) + F2(g) —’ N2(g) —’ ' (1) ___ Zr(S) + VERSION A Chem 142A — SEr. Qtr., 2008 —' Exam #1 . , '. . . ‘ Page 3 4. (9) ' ' Calculate the number of atoms of each element in 0.0185 nanograms of sodium dichromate. Na= I Cr= I . Of“— 5. (9) What is the poroentage composition of 3.50 g of ammoniumcarbonate? %N= ,%H= ',%'C= ' ,%O= VERSION A Chem 142A - Sgt. Qtr., 2008 —- Exam #1 I _ Page 4 6. (10) Calculate the mass of heptane (C7H16) burned in an excess of oxygen if 37.5 g of C02 were produced? ' ~ 7. (9) Calculate the nuc1ear binding energy per nucleon for 160Gd whose _—mass — 159. 927050 amu VERSION A Chem 142A — Spr. om, 2008 —- Exam #1 , ., r ' Page 5 8. (9) Calculate the empirical and molecular formulas of a compound containing C, H and 0 if its molecular mass is approximately 150 g/ml. Combustion of 7.36 g of the compound in anexeess- of oxygen yielded 13.3 g of 002 and 4.54 g of water. Empirical Formula = ' Molecular Formula # 9, (9) ‘ Calculate the mass of acrylonitrile (C3H3N) that could be produced by the reaction of 0.85.kg of propylene (C3-H5), 1.30 kg of ammonia, and 1.60 kg of oxygen ‘bythe equation below. 2c3H6-(g) + 2NH3(g) + 302(g) —> 2C3H3Nrg) + 6H20<g) .10. (5' Bonus Points) _ The Roman name for the element sodium is natn'um and was used to give the symbol Na. What is the modern name for element 1 1? _ Answer VERSION A ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern