Imma go with b : the evidence is in the text
True
the definition of matter is any substance that has mass and takes up space.
Yes a nucleus is located inside a cell.
<span>The answer is the H2CO. It has two sigma bonds ( the single bonds between each H and C) plus one pi bond and one sigma bond that consitute the double bond between C and O. The other compounds, CHCl3, H2S and HBr, only have single bonds which are sigma bonds.</span>
