Cigarettes contain many chemicals. Which of the following chemicals is the addictive component to cigarettes?

a. tar

b. nicotine

c. carbon dioxide

d. carbon monoxide

The chemical messengers released into the spatial junctions between neurons are called

What are the products of a combustion reaction?

I am going to build a boat. My friend says I cannot put a refrigerator and a television in my boat because that would make it too heavy-and the boat might sink.

When a mixture of limestone and clay is heated in a rotary kiln cement is produced. Burning a mixture of methane and air heats the kiln. Carbon dioxide is one of the main gases give two reasons why.

Does the density of ice affect the melting rate of ice, or does adding objects affect melting rates? I'm going to need evidence of some kind. If not, that's okay.

Why are 3 ammonium groups needed for every 1 nitride ion?

How do you explain the relativity high conductivity of tap water compared to a low or zero conductivity for distilled water

According to Newtons's first law, which characteristic of a moving object would remain constant if there were no other force of acting of it? A. Size B. Mass C. Shape D. Speed

Standard reduction potentials are 1.455 V for the PbO2 (s) / Pb (s) couple, 1.82 V for Co3 (aq) / Co2 (aq), 3.06 V for F2 (g) / HF (aq), 1.07 V for Br2 (l) / Br - (aq), and 1.77 V for H2O2 (aq) / H2O (l).

Which compound is inorganic? a. glucose (c6hl2o6) b. carbon dioxide (co2) c. ethane (c2h6) d. stearic acid (cl8h36o2) ?