Which compound has only 1 single bond?

Group of answer choices
N2
CO2
Br2

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

Which of the following molecules is polar? c3h7oh c2h5cooh