Which of these is a physical property? flammability malleability reactivity toxicity

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

What is the polyatamic ion of thiosulfate

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-