What does A pH of 10 denote?

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Which statement best describes what happens when molecular compounds melt