What is another name for biomass energy

Ancient metalworkers in East Africa knew the secrets of strengthening their iron. They knew that if they melted their iron in a furnace fired with coal, then when it cooled and solidified it would be harder than the original iron.

Which two samples of gas at STP contain the same total number of molecules? (1) 1 L of CO (g) and 0.5 L of N2 (g) (2) 2 L of CO (g) and 0.5 L of NH3 (g) (3) 1 L of H2 (g) and 2 L of Cl2 (g) (4) 2 L of H2 (g) and 2 L of Cl2 (g)

At which type of boundary does a strike-slip fault occur? A) Transform B) Divergent C) Convergent D) Hotspot

To sterilize a 50.0-g glass baby bottle, we must raise its temperature from 22.0ºc to 95.0ºc. how much heat transfer is required?

Earthquakes happen when rocks bend and snap back in process called

Determine the name of the compound Li2O

Complete the reactions to show how butanoic acid may be converted to phenyl propyl ketone.

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary