What atomic or hybrid orbitals make up the sigma bond between si and h in silane, sih4?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors

Who examines and coordinates the cleanup of polluted sites?