Alkanes are hydrocarbons that contain what type of bonds?
a) single covalent bonds only
b) at least one double bond
c) at least one triple bond
d) ionic bonds

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.