2017 Exam 1 blank and key.pdf - Name(PRINT CLEARLY Exam 1(100 points Chemistry 1303.002 Seat Number On my honor I have neither given nor received

2017 Exam 1 blank and key.pdf - Name(PRINT CLEARLY Exam...

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Name ( PRINT CLEARLY ) Seat Number Exam 1 (100 points) Chemistry 1303.002 September 20, 2017 On my honor, I have neither given nor received unauthorized aid on this exam. Signed Date Fill in the blanks with the appropriate word, phrase, number, or unit. 1. (3 points) The percent composition (by mass) of carbon in CO 2 is . 2. (4 points) If the compound Na 3 SbO 4 is correctly called "sodium antimonate", then what are the chemical formulas for the following compounds? antimonic acid sodium hydrogen antimonite 3. (6 points) Name the following compounds. P 4 S 10 Co(OCN) 2 CH 3 CH 3 4. (8 points) Write the formula for the following compounds. oxalic acid ammonium dichromate potassium phosphide cobalt (II) sulfate heptahydrate 5. (3 points) The properly BALANCED reaction for the complete combustion of C 4 H 10 is 6. (5 points) The number of oxygen atoms in a 131.4 g sample of Mg 3 (PO 4 ) 2 (molar mass 262.8) is . The number of cations in this sample is 7. (4 points) List the formulas of the six strong acids: . 8. (2 points) The molecular formula of a compound with the empirical formula C 2 H 5 N and a molecular mass of 129.1 g/mole is .
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page 2 9. (15 points) For the following three reactions, consider if the reactions will occur. If so, write the balanced MOLECULAR EQUATION and the NET IONIC EQUATION only. NOTE: You do NOT need to show the full ionic equation. HOWEVER, be sure to show the STATES for every substance (a) NH 4 NO 3 ( aq ) + Na 2 CrO 4 ( aq ) → (b) CrCl 3 ( aq ) + K 3 PO 4 ( aq ) → (c) HF ( aq ) + Ba(OH) 2 ( aq ) →
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page 3 10.
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