1303f18exam123forstudy1.pdf - 1 Exam I CHEM 1303.001 FALL 2018 Name(print legibly_Seat no On my honor I have neither given nor received unauthorized aid

1303f18exam123forstudy1.pdf - 1 Exam I CHEM 1303.001 FALL...

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1 Exam I CHEM 1303.001 FALL 2018 Name (print legibly)___________________________________________Seat no.__________ On my honor, I have neither given nor received unauthorized aid on this exam. Signed _______________Date September 19, 2018 Part 1. 40 pts 1. (14) pts. Calcium phosphide reacts with water to produce phosphine, PH 3 , and calcium hydroxide according the balanced equation below. Consider a reaction where 40.5 grams of PH 3 are produced, and 25.7 grams of Ca 3 P 2 remain unreacted. Needed molar masses for the problem are given below each formula. All table entries are in moles. Ca 3 P 2 ( s ) + 6 H 2 O( l ) à 2 PH 3 ( g ) + 3 Ca(OH) 2 ( s ) molar masses: 182 18.0 34.0 -- Initial (mol) Change (mol) Final (mol) a. Fill in all 9 table entries in moles . DO NOT CALCULATE AMOUNTS FOR Ca(OH) 2 . Show your work below for the entries above . b. The limiting reagent is ___________ c. Calculate how many grams of Ca 3 P 2 were present at the start of the reaction.
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2 2. Nomenclature. 12 pts. total. 2 pts. each. Fill in the names and formulas in the table below. Name Formula calcium dichromate lithium carbonate pentahydrate perbromic acid Se 4 F 6 VI 5 K 2 C 2 O 4 3. (8 pts) In this question, make sure to specify ( aq ), ( s ), ( l ), ( g ) for all species. Consider the reaction between acetic acid, CH 3 COOH, and Ba(OH) 2 , in aqueous solution. a. Write the balanced molecular equation. b. Write the ionic equation. Circle the spectator ion(s) in this reaction. c. Write the net ionic equation. 4. (6 pts) Write the names and formulas for the six strong acids. (6 pts for all correct. 5 pts for 5 correct. 4 pts for 4 correct. No pts for less than 4 correct. Name Formula
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3 Part 2. Multiple choice (use answer card). 60 pts. total. 3 pts. each. 20 questions. Indicate the BEST answer for the questions in this section by completely filling in the appropriate space on the answer card with a #2 pencil. Mark only one space per question. 1. Express the answer to the following operation with the correct units and number of significant figures. (8.862 x 10 –3 km + 3.351 x 10 –2 km) 2 –––––––––––––––––––––––––––––––––– = (8.022 x 10 –2 km/s) a. 2.238 x 10 –2 km s b. 0.5282 s c. 2.238 x 10 –2 km/s d. 7.573 x 10 –3 km s e. 0.5282 km s 2. The density of methanol, a colorless organic liquid used as solvent, 0.792 g/mL. Calculate the volume (in mL) of 15.0 g of the liquid. a. 18.9 b. 11.9 c. 10 d. 6.9 e. 1.00 3. 50.0 lb = ________ nanograms. (1.00 lb = 454 g) 4. Pb#$%##&%contains
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