Which of the following describes nuclear fission?

it requires extremely high temperatures to begin the reaction.
it involves the combining of nuclei.
it involves bonding electrons.
its chain reactions can be initiated by neutrons.

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

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

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ