Empirical formula and formula unit of an ionic compound
A. are always similar
B. are always different
C. may be similar or different
D. ionic compounds don’t’ have any empirical formula
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A. are always similar
B. are always different
C. may be similar or different
D. ionic compounds don’t’ have any empirical formula
A. to carry out complete combustion
B. to reduce the economy of the process
C. to reduce the time for completion of the reaction
D. all of the above
A. 6
B. 5
C. 4
D. 3
A. 2 g
B. 20 g
C. 40 g
D. 80 g
A. a hypothesis
B. a fact
C. a law
D. an observation
A. CO is 1.25 times faster than CO2
B. CO is 3.75 times faster than CO2
C. CO is 1.25 times faster than CO
D. Both diffuse at the same rate
A. Hydrogen bonding
B. Vander Waals force
C. Forces among the polar molecules
D. Ionic bond