CHEM 221 Lecture 8: Scan from a McGill uPrint device (10)
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Related Questions
1. 1. What is themolar % composition of Cl in carbon tetrachloride?
Choose oneanswer.
A. 92.2% | ||
B. 23.0% | ||
C. 71.7 | ||
D. 46.1% | ||
E. 7.8% |
2. I2. n thecorrect Lewis structure for methane (CH4) molecule, howmany unshared electron pairs surround the carbon?
Choose oneanswer.
A. 4 | ||
B. 8 | ||
C. 2 | ||
D. 0 |
3. 3. Choose the correct order of elements from most to leastelectronegative.
Choose oneanswer.
A. Zr, Mo, Cd, As,Cl | ||
B. Cl, As, Cd, Mo,Zr | ||
C. Cl, As, Mo, Zr,Cd | ||
D. Cl, As, Zr, Mo,Cd |
4. 4. How many molecules are present in 0.85 moles ofcobalt nitrate?
Choose oneanswer.
A. 5.12 x 10^23 | ||
B. 6.02 x 10^23 | ||
C. 180.93 | ||
D. 2.55 x 10^23 |
5. I5. n ionicbonds, valence electrons are
Choose oneanswer.
A. ignored. | ||
B. unequallyshared. | ||
C. destroyed. | ||
D. transferred. | ||
E. equallyshared. |
6. 6. Place these elements in the order of smallest atomic radiusto largest atomic radius.
Choose oneanswer.
A. Cl, As, Cd, Mo, Zr,Cs | ||
B. K, Ca, Sc, Ti, V,Cr | ||
C. K, Ca, Sc, Ti, V,Cr | ||
D. Xe, Kr, Ar, Ne, He,H |
7. 7. Molecular Bonds may be produced by any of the followingprocesses involving electrons EXCEPT
Choose oneanswer.
A. gaining ofelectrons | ||
B. losing theelectrons | ||
C. splitting ofelectrons | ||
D. sharing theelectrons |
8. 8. Empirical formula C3H7 is found to have a molecular weightof 86 g/mole. What is the molecular formula? (Numbers on thefollowing choices are subscripts)
Choose oneanswer.
A. CH | ||
B. CH2 | ||
C. H2O | ||
D. C6H14 |