Individuals may have to do without health care during which business cycle scenario?

How is perchloric acid prepared?

a. By distilling a mixture of potassium perchlorate and sulfuric acid at less-than-atmospheric pressure b. By distilling a mixture of sodium hydroxide and sulfuric acid at less-than-atmospheric pressure c. By distilling a mixture of hydrochloric and sulfuric acid at less-than-atmospheric pressure d. It occurs naturally under the Earth's crust in mineral deposits

A __________ is placed over the tissues during surgery to guide the dentist in the placement of the implant

a. surgical stent template b. mouth mold c. neither a nor b d. both a and b