When oxygen is not bound to the iron molecule of hemoglobin, the iron molecule is in the ferrous (Fe2+) charge state, rather than when oxygen changes the charge of iron to the ferric (Fe3+) state. A dangerous form of hemoglobin that is unable to oxidize is:

You are visiting a friend's home and suddenly hear a child crying out in the kitchen. As you assess the scene you note kitchen cabinets are open with bottles tossed around. The child is holding her hand to her mouth. Your friend tells you that the child must have tasted something that she didn't like. Based on your scene assessment, you would:

a. agree with your friend and suggest that a cookie would take the bad taste away. b. ask your friend if she has Ipecac so you can make the child vomit. c. call 911 and try to identify which bottle the child may have been drinking from. d. offer the child a glass of milk to dilute any chemical he may have ingested.

The electrical resistance measured between opposite faces of a 1.00 cm cube of an aqueous solution at a specified temperature is termed:

A. Resistivity. B. Conductivity. C. Amperometry. D. Voltammetry.