Page 134 - Chemistry eBook

chemical reactions?
o
(1) mass, charge, density
(2) mass, charge, energy
(3) charge, volume, density
(1) 7 electr (2) 17 neutr (3) a mass n (4) an atom
Which subs chemical ch
(1) ammoni (2) methan
At standard less soluble from 10.°C
(1) HCl (2) KCl
Which type the grams o the solution 1 000 000?
(1) molarity (2) parts pe
Which type random mo sample of ai
(1) chemica (2) electrica
Sample Regents Questions
(4) charge, volume, energy
11 Which phrase describes the distribution of charge and the polarity of a CH4 molecule?
(1) symmetrical and polar
(2) symmetrical and nonpolar (3) asymmetrical and polar
(4) asymmetrical and nonpolar
atom? (1) 0
(2) 􏰀2
13 Which ion has no electrons?
(1) H􏰁 (3) Na􏰁 (2) Li􏰁 (4) Rb􏰁
June 2012 #11
(3) 􏰁8 (4) 􏰁16
21
19
20
12 What is the charge of the nucleus of an oxygen
14 To break a chemical bond, energy must be
Answer
Choice #2
Explanation: If you draw the diagram of CH4, the C is in the center and the H’s
are each on one side of the C. This makes the molecule symmetrical. Symmetrical
molecules are n(o1n)poalbars.orbed (2) destroyed
(3) produced (4) released
22
15 Which Lewis electron-dot diagram represents a nitrogen atom in the ground state?
23
The tempe
134 © UNIT 4: BONDING
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