Examlex
A molecule that has an empirical formula of HO and a molar mass of 34.02 gram must have a molecular formula of H2O2.
Paraphyletic Group
A group of organisms that includes an ancestral species and some, but not all, of its descendants.
Common Ancestor
The most recent shared ancestor among different species or individuals from which they have descended.
Evolutionary Lines
Paths of descent or lineages that show the evolutionary history and relationships among organisms.
Genus
A rank in the biological classification system (taxonomy) that groups together species that are closely related.
Q3: Which molecule below would have a Lewis
Q10: The Lewis structure for O<sub>2</sub> contains a
Q34: The distance between the two hydrogen atoms
Q43: What is the molar mass of aluminum
Q52: The empirical formula mass must be 25.0
Q59: If 2.01 × <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6110/.jpg" alt="If 2.01
Q68: An aqueous solution is a homogeneous mixture
Q78: The possible values for the principal quantum
Q84: What is the name of Ca(NO<sub>3</sub>)<sub>2</sub>?<br>A)calcium dinitrite<br>B)calcium
Q109: Diatomic O<sub>2</sub> can react with the element