- When magnesium burns in air, it combines with oxygen to form magnesium oxide
according to the following equation.
2Mg(s) +02(g) —2MgO(s)

Omg imgonnafailnfiedkla use complete sentences to explain how the mass of hydrogen is conserved during cellular respiration.

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.