Lauren wants to determine the density of a glass marble. First, she puts the marble on a digital scale which reads 10.2 g. She then puts the same glass marble in a graduated cylinder partially filled with water. The bottom of the meniscus in the cylinder rises from 31.5 mL to 34.5 mL. Determine the density of Lauren's marble.

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2