Hematite and magnetite are important ore minerals of found in . a. zinc, hydrothermal deposits b. iron, banded iron formation (BIF) c. copper, secondary enrichment deposits d. aluminum, placer deposits

Predict the products butane (c4h10) + oxygen —>

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology