题目内容

The conjugate acid of HPO4-is ( )

A. PO43-
B. HPO42-
C. H2PO4-
D. H3PO4

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Which salt gives an acidic solution when dissolved in water ( )

A. Ba(NO3)2
B. NaNO2
C. KBr
D. NH4I

Determine the molecular geometry of XeF4. ( )

A. tetrahedral
B. trigonal bipyramidal
C. T-shaped
D. seesaw

If the plot of the reactant concentration versus time is nonlinear, but the concentration drops by 50% every 10 seconds, then the order of the reaction is ( )

A. zero order
B. first order
C. second order
D. third order

If the plot of the reactant concentration versus time is linear, then the order of the reaction is ( )

A. zero order
B. first order
C. second order
D. third order

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