题目内容

Calculate the molarity of a solution of 0.556 g PbCl2 in 125 mL of solution. Atomic mass: Pb = 207.2, Cl = 35.5 ( )

A. 4.45 M
B. 0.0160 M
C. 4.45 g/L
D. 1.60 x 10-5 M

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Calculate the molarity of a solution of 0.556 g PbCl2 in 125 mL of solution. Atomic mass: Pb = 207.2, Cl = 35.5 ( )

A. 4.45 M B. 0.0160 M C. 4.45 g/L D. 1.60 x 10-5 M

Which pair of reactants would you use to prepare manganese() sulfide by a reaction between ions in solution? ( )

Which sample of a gas would follow the ideal gas equation most closely? ( )

What is the approximate ratio of the effusion rates between O2 and H2 gas? ( )

Electrons are lost by the ( )

A. 4.45 M
B. 0.0160 M
C. 4.45 g/L
D. 1.60 x 10-5 M