F02_E1 - ID Number: _ _ - _ _ _ _ (LAST six digits only!)...

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ID Number: _____ _____ - _____ _____ _____ _____ (LAST six digits only!) Page 1. (38 pts) Page 2. (26 pts) Page 3. (16 pts) Page 4. (20 pts) Bonus (below): (01 pts) Total: (100 pts) Bonus (01 pt): Imagine that the nuclide 14 O were to absorb an electron into the nucleus (rather than emit a beta particle). What nuclide would it form? _____________.
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Chemistry 111 Page 1 out of 6 Exam I / Fall 2002 ID Number: _____ _____ - _____ _____ _____ _____ Show all your work in the space provided in order to receive any credit at all! 1. What is the formula for potassium phosphate? (03 pts) 2. Determine the number of moles of oxygen atoms (O) in 25.0 grams of oxygen gas (O 2 ). (06 pts) 3. How many hydrogen (H) atoms are there in 32.1 g of aluminum hydroxide, Al(OH) 3 , MW = 75.98 ? (10 pts) 4. During a combustion of a 20.0 g sample of an unknown hydrocarbon (a compound that has carbon and hydrogen only), 31.0 g of water are formed. What is the mass percent of H in that hydrocarbon? (08 pts) 5. When you balance the following reaction without fractional coefficients, the coefficient in front of the KClO 3 is… (03 pts) KClO 3 KClO 4 + KCl 6. If the empirical formula for a compound is CH 2 and it has a molecular weight of 210, what is the molecular formula? (08 pts)
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F02_E1 - ID Number: _ _ - _ _ _ _ (LAST six digits only!)...

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