The correct name for MgF2 is ________.
A) monomagnesium difluoride
B) magnesium difluoride
C) manganese difluoride
D) manganese bifluoride
E) magnesium fluoride
Question 2
When the following equation is balanced, the coefficient of dinitrogen pentoxide is ________. N2O5 (g) + H2O (l) HNO3 (aq)
A) 1
B) 2
C) 3
D) 4
E) 5
Question 3
The correct result (indicating the proper number of significant figures) of the following calculation of the molecular mass for H2SO4 is ________.
4 15.9994 + 32.066 + 2 1.0079
A) 98.08
B) 98.079
C) 98.074
D) 98.838
E) 98.84
Question 4
The enthalpy change for the following reaction is -483.6 kJ: 2H2 (g) + O2 (g) 2H2O (g) Therefore, the enthalpy change for the following reaction is ________ kJ. 4H2 (g) + 2O2 (g) 4H2O (g)
A) -483.6
B) -967.2
C) 2.34 105
D) 483.6
E) 967.2
Question 5
One difference between first- and second-order reactions is that ________.
A) the half-life of a first-order reaction does not depend on A0; the half-life of a second-order reaction does depend on A0
B) the rate of both first-order and second-order reactions do not depend on reactant concentrations
C) the rate of a first-order reaction depends on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations
D) a first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed
E) None of the above are true.
magnesium
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