If an object has a volume of 5 ml and a mass of 50 g, what is the density of the object?

0.10
10
40
250

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

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

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.