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Calculate the pH of a 0.02 M solution of HCN (Ka= 6.2×10-10). Express your answer numerically to 2 decimal places, be sure to show/explain all work to be considered for part credit. 

We measure a star’s  _________________   _______________ (two words) by using the lines that appear in its spectrum; it is related to surface temperature. These basic types are designated by letters (OBAFGKM, with O for the hottest stars and M for the coolest) and are subdivided with numbers from 0 through 9.

Algunas personas creen que _____________ es más importante que leer una variedad de literatura.

How many grams of water can be melted with [x] kJ of heat?  Hf = 334 J/g        Hv= 2260 J/g 

Completa con el imperfecto de subjuntivo: usa las dos terminaciones. Era preciso que nosotros (saber)_____________ la verdad.

Use this space to describe your work for potential partial credit.

The process that transports waste products, including many drugs, into the tubular fluid is called

A sample of copper has a density of 8.96 g/cm3.  How much would a [x] cm3 sample of copper weigh in grams? 

VOCABULARIO (20 puntos)

La rutina de escritura de Allende es muy relajada.