Which physical property of matter do these four objects have in common? Picture has: brass key, rubber band, plastic ping pong ball, glass marble
Options:
A- They are all non-magnetic.
B- They all sink in water.
C- They all have the same volume.
D- They all float in water.
Will give brainliest to whoever answers

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

Name the element in group 17, period 2. (periodic table)

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?