if 30 ml of 0.50 m oh- is added to 200 mls of a 1.5 m buffer (ph 7.4), what is the resulting ph in the buffer? the pka of the buffer is 8.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?