Which Statement describes the formation of stars. A. They begin in nebulas
B. Heat and gasses contract
C. Gravity causes stars to cluster
D. Dust and gasses contract

Nickel crystallizes in the face-centered cubic (fcc) lattice. the density of the metal is 8902 kg/m3. calculate the radius of a nickel atom.

What’s a special glass that most beakers are made of

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)